The regulation on electrical low voltage plants.

Date-1998-11-06-1060 Ministry of Justice and emergency Ministry published in 1998 1654 (Guidance) (annex II) entry into force 01.01.1999 Recently changed-2005-06-30-744 Change FOR-1989-12-20-1430, FOR-1975-09-19-8612 applies to Norway Pursuant LAW-1929-05-24-4-section 2, FOR-2002-05-23-770,-2003-09-01-1161 Announced Directed 01.06.2016 (guidance section 10) short title regulations on electric low voltage system Chapter overview: Preface chapter I. Introductory provisions (sections 1-6) chapter II. Administrative provisions (§ § 7-11) chapter III. Documentation, information and message (§ § 12-15) chapter IV. Planning and execution (§ § 16-19) chapter V. Security requirements (§ § 20-38) Annex I annex II national customizations guidance to regulations on electrical low voltage plants.
Attachment in. Annex II.

Legal authority: established by the Product and electricity authority (now the Directorate for civil protection and emergency preparedness) 6. November 1998 under the legal authority of the Act 24. in May 1929, no. 4 about the supervision of electrical installations and electrical equipment section 2.
Changes: modified by regulations 12 nov 1999 Nr. 1155, 1 feb 2002 No. 127, 10 July 2002 No. 810, 6 nov 2003 Nr. 1316, 30 June 2005 Nr. 744. Corrections: 01.06.2016 (guidance section 10).

Preface the regulations laid down in pursuance of law 24. in May 1929, no. 4 about the supervision of electrical systems. The purpose of the regulation is to achieve the proper security by projecting, execution, changes and maintenance of electrical low voltage installations and by the use of equipment connected to such facilities.
The regulation replaces regulations for electrical building installations, etc. (feb) of 20. December 1989 Nr. 1430 and will take effect from the 1. January 1999.
The scope of the regulation is mainly the same as for regulations for electrical building installations, etc., i.e. It encompasses a wide range of different types of low voltage facility that is associated with an external supply system or for your own generator, solar panels, etc. Electrical low voltage plants are plants with the highest nominal voltage and with 1,000 V alternating current or direct current 1,500 V used in the.

-housing-places with commercial business (offices, shops, workshops, etc.)

-public sector-hospitals and other health institutions (private and public)-industry-agriculture and horticulture-prefabricated buildings-caravans, camping sites and corresponding-construction sites, exhibitions, fairs and other time-limited companies-marinas.

In addition, the Regulation provisions on plants that generators, emergency and reserve power supply etc. The list of active site are intended as examples and are not exhaustive.
Requirements to the design, execution and marketing of equipment and material that together make up the plant or to connect this is not regulated in this regulation and the norms that the regulation refers to. This is regulated in their own forskrifter1 which is based on EU directives. Regulations and the standards it refers to govern, however, the execution required from. the stresses that equipment and material are expected to be exposed to in the current facility.
The provisions of the regulations for electrical building installations, etc. that apply to electro-medical equipment expires and is covered by separate regulations. 2 facilities in health institutions such as the electro-equipment is connected to the covered by the regulations and the standards these regulations refers.
The regulation takes into account that since the regulations for electrical building installations, etc. came into effect, there has been a development in the laws that protect consumers in connection with the purchase of craftsman services and governing responsibility on disposal of real estate.
The regulation is a functional regulation regulation on systematically adapted to health, environment and security work in businesses (internal control regulations).
That regulation is functional implies that the regulation does not contain detailed technical requirements for the execution of the low voltage plant, but provides basic security requirements showing which hazards regulation aims to guard against. The regulation refers to the norms that describe how the security requirements can be met. Regulation with the guidance and the norms that are shown to, the overall it security level that is to be added to reason. However, it is only the regulations which are legally binding so that one can choose other solutions. By the choice of other solutions that could need to be documented. by analysis of the risk that at least equivalent security is achieved as if they are the standards the regulation refers to should be assumed. If it turns out that there is conflict between the security requirements the regulation sets and solutions as standards or any alternative solutions adds to the reason, is it forskriftens security requirements to be met.
Customization to the internal control regulations means that of the regulations is added to clarify responsibilities. An important change in relation to the regulations for electrical building installations, etc. is that the person responsible for the businesses that project, perform or own plant is responsible for that forskriftens requirements. However, taking into account that the regulations owners of private homes and holiday houses are not covered by the internal control regulation because they are not considered as businesses. On the other hand, agriculture and animal husbandry in this context businesses so that the plant used in such business is also covered by the internal control regulations.
The regulation puts responsibility on those who at any given time affects the security of the facility and equipment associated with this from the plans and works proceed and out the plant's lifetime. The regulation therefore operates with several that are imposed on the obligation to meet the forskriftens requirements:-engineers, eg. consulting engineers-the performing eg. installation-owner/Builder user.

In the regulations for electrical building installations, etc. is the responsibility of the facility's security satisfactory added on it that perform the plant, normally the installer. However, it has been shown that this has unfortunate consequences because the security level of the current plant already is added by the engineering. It is therefore necessary that those who plant project for the work attributed responsibility they perform on a par with those of the actual execution. Regulations to account for that in many cases, the (n) as the project and perform the plant be one and the same business.
The responsibility as the one who performs facility has for that it meets forskriftenes requirements are not changed in this regulation in relation to the regulations for electrical building installations, etc.
In relation to the regulations for electrical building installations, etc. are the Builder introduced as own duty subject on equal footing with the owner. The rationale for introducing the Builder as own duty subject is that it will put this able to better fulfill its obligations as a future owner of direct involvement in the decisions taken during the execution of the plant. During the performance of the facility will be the owner/Builder as the supervisory authority will targeting by an order directed to the execution of a concrete plant.
User will as of today be the that uses the facility i.e. equipment that is associated with the plant. User is not necessarily the owner of the plant, but can be the tenant.
Owner/builder and user can be businesses, and falls under the requirements, accordingly, that the internal control regulation provides the systematic adherence to regulations. In many case, however, will these be individuals and thus not subject to the requirements of internal sets.
In the regulations for electrical building installations, etc. is the requirement that the plant will be both forhåndsmeldes and reported as finished either to the Directorate for civil protection and emergency preparedness or the local eltilsyn (DLE). In this regulation is the requirement of the finished message, but it dropped to manage the execution of the plant have a duty to send a message before the work starts. The message's content is limited to the information that is required to exercise the public audit. The supervisory authority must out from an assessment of risk determine how authority should be exercised in each case.
It is introduced for any duty which is responsible for the engineering, construction or alteration of a facility to issue a statement that will be delivered owner that the plant is planned, conducted and controlled so that it meets the security requirements of the regulations. This duty is linked with a requirement that it should be worked out technical documentation and a description of the plant. The requirement description Specifies the minimum information that should be released with respect to how the plant is carried out. Such a description will have practical importance eg. When another installer from the one that has carried out the facility to make maintenance, expansion of the plant and the like. Especially important is it to have such documentation available when the now separated from the regulation description of procedures, choice of solutions, etc. and allows for the use of alternative solutions. Owners of the plant have a duty to keep the updated documentation of the facility.
The regulation requires that the planning of the facility should be made a total review of all matters pertaining to the resort's area of application to ensure that it is fit for purpose. The choice of solution for the plant to be based on the assessment of the risks associated with the current facility. The result of this review the documentation to be submitted for the plant visit.
Product and electricity authority 1. July 1998.

1 regulations on electrical equipment, regulations about equipment and safety system for use in an explosive area.

2 regulations on the use and maintenance of electro-medical equipment.

Chapter I. Introductory provisions


§ 1. Purpose the purpose of the regulation is to achieve proper electrical safety by projecting, execution, changes and maintenance of electrical low voltage installations and by the use of electrical equipment connected to such facilities.

§ 2. Scope the regulation applies to the design, execution, modification and maintenance of electrical low voltage installations, including the low voltage plant for the main, reserve and emergency power supply. The regulation also applies to the use of electrical equipment, including high-voltage equipment, connected to low-voltage systems.
The regulation does not apply to:-electrical supply facility comprehensive electrical systems for the production, transmission and distribution of electric energy as well as certain electrical systems in force and transformatorstasjoner as well as high-voltage plants in industrial companies and the like,-electrical systems aboard the ship and sea implements, including removable drilling platforms and the like,-electrical systems at facilities that are used for survey and exploration drilling in the petroleum business,-electrical systems in aircraft, or electronic telecommunication and information systems.

§ 3. Definitions Electric low voltage conditioning plant with highest nominal voltage and with 1,000 V alternating current or direct current 1,500 V.

§ 4. Coercive Find central supervisory authority that the electrical system which is subject to supervision is not done in the proper manner-or-in accordance with the regulations or is inadequately maintained, or-by the way is in such condition that it after Central Supervisory Government opinion offering danger for human lives, livestock or for property damage, the central supervisory authority take such action as mentioned in law 24. in May 1929, no. 4 about the supervision of electrical installations and electrical equipment section 6 and section 7.

§ 5. The penalty provision in violation of these regulations or decisions made in pursuance of this punishable according to the law 24. in May 1929, no. 4 about the supervision of electrical installations and electrical equipment section 14.

section 6. The entry into force. Repeal of other regulations. Transitional provisions this Regulation shall enter into force 1. January 1999.
From the same date of revocation regulations of 20. December 1989 Nr. 1430 for electrical building installations, etc., except for the provisions in section 810.
Low voltage systems can still plans and works proceed after the technical provisions of the regulations for electrical building installations, etc. up to 1. July 1999.

Chapter II. Administrative provisions section 7. Supervision Central supervisory authority or the central supervisory authority authoring, oversees observance of this regulation.

section 8. Complaint access Central Supervisory Authority is the appeal authority for decisions made by the authority subject to the central supervisory authority.
The Ministry's complaint authority for decisions made by the central supervisory authority.

§ 9. Responsibility-who addresses the regulation the owner and user of the facilities covered by this Regulation shall ensure that it is made necessary inspection and maintenance so that the plant at all times meets the requirements of chapter V. By the use and connection of electrical equipment to the plant should see due care so that it does not occur risk to life or property.
Any project, perform, modify, or make maintenance of facilities, is responsible for ensuring that the work undertaken is in accordance with the forskriftens requirements.
The who perform or change facilities are responsible for ensuring that the message being sent as discussed in section 14.

§ 10. Fulfillment of the safety requirements the regulations, supplemented with related guidance and norms, the overall it security level that is to be added to reason. Guidance and normenes detailed recommendations, however, is not legally binding, so that other solutions can be selected. When selecting another solution to the documented that corresponding security level is achieved.
In the Guide to these regulations is the specified norms that describe how the security requirements can be met.
Combinations of parts of norms should be avoided unless it can be documented that it achieved a similar level of security.

section 11. An exemption can provide Central Supervisory Authority written exemption from this regulation if the particular circumstances warrant.

Chapter III. Documentation, information and message section 12. Control. Declaration of conformity. Documentation before the new facility is taken into use and after each change to the person responsible for the performance or the change of the plant to make sure it is checked and tested to ensure that it satisfies forskriftens requirements.
Anyone who is responsible for the engineering, construction or alteration of facilities will issue the Declaration of conformity with the safety requirements in chapter v. underpinning such statement shall be prepared documentation that makes it possible to assess whether the plant is in compliance with forskriftens requirements.
Declaration of conformity and documentation should be handed the owner of the facility.
If it has been necessary to take special precautions in the plant in order to meet the requirements of the electromagnetic compatibility, it should that project or perform the plant making the instruction for use and maintenance of these measures.

section 13. Storage of documentation the owner of the facility shall at all times keep the Declaration of conformity and updated documentation as specified in section 12.
Anyone who according to § 12 is required to issue the Declaration to keep the copy of the Declaration for at least five years from the day the Declaration of conformity is dated.

section 14. Message Before execution and modification of electrical systems begin to send message to the central supervisory authority or the the authoring. For minor changes required there is no message.
The message should at least include:-owner's/building master's name and address as well as the address of the facility,-power consumption expected,-use of the plant,-name of the installer, interface between the performing of any shared contracts and assumed time for completion.

Exempt from the message, the following facilities, as long as they are not placed in the explosive range:-plant with nominal voltage not higher than 50 V alternating current and direct current 120 V.

plant in caravans, campers, etc.

-Power generators with benefits exceeding 10 kVA.

section 15. Message of accidents/accident personal injury or damage to the facility or property that is caused by electricity, shall in each case be filed as soon as possible to the central supervisory authority.

Chapter IV. Planning and conduct section 16. Planning and assessment of risk electrical systems should be planned and carried out so that people, domestic animals and property are protected against danger and damage normal use and so that the plant is suitable for the required use.

§ 17. The availability of maintenance facility will be planned and executed so that it is available for inspection, maintenance, repair, operation and testing services-there is sufficient space to replace and assemble individual entities, and that such work can be done without the risk of it who do the work.

§ 18. Distribution system Facility to be scheduled and carried out so that the distribution system used for all or part of the plant along with the security measures that are required for the different distribution systems, does not cause-dangerous power review,-for high temperatures which may cause burns, fire or other harmful effects, that could lead to disruption risk for people, pets or property,-harmful influence of other parts of the plant or equipment in or connected to this.

§ 19. Earthing systems at the planning and execution of the plant to ensure that the earthing system is adapted to the distribution system that is selected for all or part of the plant, so that it does not occur dangerous current flow or high temperatures which may cause burns or fire.

Chapter v. Protection security requirements and other safeguards section 20. Protection against electric shock in normal use people and livestock should be protected from the danger that may occur by direct touching of voltage before the end parts of the plant and equipment.

§ 21. Protection against electric shock by the wrong People and livestock should be protected from the danger that may occur by touching the exposed parts that have been the voltage before end as a result of error (indirect touch).

§ 22. Protection against harmful thermal effects electrical systems should be so carried out that there is no danger of ignition of flammable materials due to too high a temperature or electric arc. During normal operation it should also not be any danger to people or livestock can be exposed to combustion.

§ 23. Protection against overstrøm People, domestic animals and property should be protected against damage from high temperature or electromechanical stresses caused by some form of foreseeable flood in the energized conductors.

section 24. Protection against wrong currents other leaders than energized leaders and any other part intended to cause an error power as a result of insulation failure or error, should be able to cause this error to assume power without too high a temperature.

§ 25. Protection against surges of people, livestock and property shall be protected against:-adverse effects of isolation failure or error between power circuits with different voltages, and damage caused by other unwanted high voltages, such as atmospheric discharges or koblingsoverspenninger.

§ 26. Protection against the base voltage People, domestic animals and property should be protected from danger or damage that is caused when the voltage comes back after the whole or in part the outcome of tension. If the gjeninnkobling of the policy may create a dangerous situation, should not gjeninnkobling happen automatically.

§ 27. Protection against voltage drop in the consumer's facility should be planned and executed so that the voltage drop in the plant does not preclude that the equipment gets the thrill it is intended for.


section 28. Protection against external influences the plant and the materials and equipment that are included in this should be adapted to the external influences that can be expected to be exposed to.
If a device is made so that it will not withstand the rigors of the current environment, it can still be used if a suitable and sufficient additional protection.

section 29. Nødutkobling in facilities where it is needed with fast shut-off (manual) to avoid the risk, should it be installed equipment for nødutkobling. Such equipment should be well visible and easily accessible, and to be able to be operated without danger.

section 30. Equipment for disconnecting it should be installed equipment for the disconnection of the facility, rates or individual pieces of equipment, so that maintenance, testing, troubleshooting and repair can be done without risk.

Interruption section 31. The interruption of power supply installation where an interruption in the power supply may cause danger to persons, domestic animals or property shall be planned and carried out so that the maintenance, replacement and more can happen without that risk occurs.
If unexpected power interruption will be able to cause danger to persons, domestic animals or the environment, the need for independent power supply be considered.

Labelling section 32. Marking of cables, protection and other materials That will be in the required degree are made so that the marking cables, equipment, protection and other materials can be identified and, incidentally, to the extent it is necessary to avoid the danger.

Electromagnetic and other electrical influences of the environment § 33. Electrical and electromagnetic interference the plant should be planned and carried out, and shall be maintained so that it produces electrical and electromagnetic disturbances that exceed a level where radio and telecommunication appliances and other appliances or facilities not work according to his purpose.
The facility and the equipment that are included in this to have enough inner electromagnetic immunity so that the outer influence the plant can function securely and according to his purpose.

section 34. Protection against internal malicious influences between the electrical and non-electrical systems (fixed part) electrical system should be made so that it does not occur between harmful influences between electric and non-electric fixed parts.

The preservation of structural properties section 35. Building konstruksjonens mechanical and fire safety properties must be such as Plant carried out that building and fire safety konstruksjonens mechanical properties are not impaired.

Electrical equipment connected to low-voltage systems § 36. Conditioning and connection electrical equipment that is part of or should be connected to a facility to when it is installed and maintained according to the manufacturer's instructions and used according to their purpose, do not bring security in danger to persons, domestic animals or property.

section 37. Properties All electrical equipment and materials which are included in or will be connected on a plant should-have such properties that it is adapted to the plant's purpose and function and be adapted to the external influences that can be expected from the environment.

If a device is not made so that it will withstand the rigors of the current environment, it can still be used if it is in the finished plant will get a suitable and sufficient additional protection.

section 38. Connection with moving cables Moving cord with Earth conductor should have earthing plug. Mobile wire without Earth conductor to have the plugin without earthing contact.
Pivoting cord for equipment class II should not have Earth conductor, but may have earthing plug.
Mobile wire should be connected in the room where its equipment is used. This does not apply to equipment designed to be moved during use.
Transition from fixed misplaced cable to the moving cord for removable equipment should in General take place at outlet and plug. Is the outlet connection is not appropriate, equipment with pivoting cord be connected in box with strain relief.

Attachment in. This appendix includes National adaptations the customizations that are required for the standards the regulations refer to, can be added to the reason for the fulfillment of the security requirements, see. forskriftens § 10.

1. Electrical low voltage installations Permitted voltage systems 1. The following AC systems can be used on the following conditions: TN-S: For all purposes up to and including 230/400 V except in areas for medical use or for emergency power supply.
For facilities in the industry and for special purposes as well with nominal voltage 690 and 1,000 V, but not for light, room heating and conditioning for the control flows and the like.
TN-C-S: For the supply of plant with nominal voltage up to and including 230/400 V as TN-C system until the first distribution. After the first distribution is used the TN-S system.
For facilities in the industry and for special purposes as well with nominal voltage 690 and 1,000 V, but not for light, room heating and conditioning for the control flows and the like.
TN-C system is used not for distribution in building installations.
TN-C system is not allowed in the explosive area.
TT: For all purposes with nominal voltage up to and including 230 V, except for medical use or for emergency power supply.
It: For all purposes with nominal voltage up to and including 230 V. For facilities in the industry and for special purposes as well with nominal voltage 400, 690 and 1,000 V, but not for light, room heating and conditioning for the control flows and the like. 
2. Also can be the following direct current systems are used: TN and TT: For all purposes with nominal voltage up to and including 230 V, with grounded center point up to and including 400 V. For special purposes in facilities in the industry, eg. electrolysis, and for the electrical path up to the plant, and with 1,500 V. IT: For all purposes with nominal voltage up to and including 230 V. For special industrial purposes up to and including 1,500 V.

Load of the PVC-insulated cable By use of PVC-insulated cable with small cross section to the protection against overload is selected so that the highest power-try the vernets in ₂ does not exceed the maximum cable strømføringsevne Iz or-vernets highest try power in does not exceed the highest ₂ try power that is used for the material in the circuit.

With small cross section cross section up to the means and with 4 mm ².

It system, the use of N-leader in the IT system be used not N-leader in Norway, this is highly recommended also in IEC/TR3 61200-413 Electrical installation guide-Clause 413: Explanatory notes to measures of protection against indirect contact by automatic disconnect of supply.

TT-system, the use of protection in order to achieve the necessary protection against electric shock in case of error, in the TT-system in practice only be used power controlled soil protection. errors

Need power supply, supply Separate "independent" supplies from the normal system of supply is considered not suitable for emergency power source.

Need power supply, security measures against electric shock safety measures against electrical shock should not be based on automatic disconnection at the first error.

The cable plant in escape routes this section defines the conditions that are attached to the interface with the planning and building Act (and its associated regulations and guides) provisions on technical facilities in escape routes.
The cable system shall preferably not be misplaced in the escape roads. If such laying on cannot be avoided, should the line be equipped with cloak or enclosure that cannot contribute to or spread the fire or assume such a temperature that the surrounding material can ignite within a time period set out for escape routes.
Cables should not be added behind the ceiling or corresponding cavities in the escape route with smaller cables represent the small fire load-the cables are led in your own shaft with shaft walls that have fire resistance equivalent branncellebegrensende building part-the ceiling fire resistance have corresponding branncellebegrensende building part-cavity is sprinklet.

The cable plant in the escape routes to misplaced lie out of reach, or be equipped with protection against mechanical damage that could possibly arise during the escape. Any cable plant in an escape route should be as short as possible.
In General, it is recommended to use cables with insulation that does not emit harmful amounts of toxic gases during fire.
Cladding or enclosure using combustible material covered with brannbeskyttende paint does not meet the requirements of this provision.

The grounding of the piping systems Metallic piping systems shall not be used as Earth electrode. Such systems (hovedvannledninger, hovedrør for central heating systems, piping systems for flammable liquids or gases and the like) should be connected to the earthing plant via the leveling compounds.
When it comes to drain lines of insulating material, it should if the dangerous potential differences can occur between the drain and other leading parts, anordnes satisfying electrically conductive connection to the inside of the drainage pipe or drain. So leveling connection is not required if it can danger [2] may occur that do not. In TN-system it can be assumed that such danger normally does not occur.

Disconnection in TN-C systems to PEN-leader could only be disconnected or switched at the same time with all the phase conductors. Phase leaders should not be able to connect without at the same time the connection of PEN-leader.
In TN-S systems applies the same requirements to disconnect and shut-off of the N-leader as for the phase conductors.

Electric heating system with forced air circulation Electrical heating system with forced air circulation (electric hot air heat recovery unit) will be in place for two independent thermostats have the thermostat and termoutløser. These should be independent of each other, connect the heating elements allpolig out in the event of high temperature in the air channels. Termoutløseren should not have automatically gjeninnkopling.

Access to overstrømsvern Overstrømsvern should be mounted on the Tablet, stand, closet or similar.

Access to the boards, racks and distribution cabinets


Apparattavler, machine stands and distribution cabinets should be just clear and be easily accessible. They shall be carried out by ubrennbart and mechanical resistant material, or of other material approved for the purpose, or be placed in their own fire cell at least of the class B 30.
In the machine room should not occur any unauthorized pipe for water, steam, gas or the like.

Marking of the PE and N-PE-N leaders and managers should be labeled according to IEC 60 446.
Insulated PEN-leaders should be labeled green/yellow through the whole length with the addition of light blue markings at the termination points.

Selection of the control devices for the link in case of emergency (including emergency stop) Control device (handle, push button and the like) for nødutkobling should be clearly marked red against a yellow background. It will be shown by the way to the Authority's regulations that implement similar provisions from the machine directive.

Earth leaders in Earth Soil misplaced leaders misplaced in the soil should be of copper with the smallest cross-section 25 mm ² or of hot galvanized steel with minimum cross section 50 mm ².
Joints that cannot be inspected shall be permanent and be protected against corrosion with a suitable method.

Medical sites-power supply and distribution system in medical areas Group 1 and group 2 to at least the following rates be provided from the IT system:-All rates calculated on connection of electro-medical equipment.

-rates for operations and research, etc., nominal voltage lamps with higher than 25 V alternating current or 60 V ripple-free direct current.

In medical areas Group 1 and group 2 should all sockets to be associated with the IT system. If this is not the case, the outlets be specially marked.
TN and TT system is allowed for the following Exchange rates, under the assumption that the interruption of treatment, examination or monitoring can take place without danger or significant disadvantage for the patient:-Rates only for the connection of the x-ray equipment.

-Quotes intended for equipment with power needs of 5 kW.

-Rates that are not intended for connection of electro-medical equipment, and where connected equipment may not come within the "patient environment".

TN-system to be TN-S system, as far as possible from the transformer or generator.
Equipment that cannot be used within the patient environment must normally be hard-wired, or at least stationary.

Medical sites-Protection by automatic disconnection of the power supply in the TN system rates that supplies equipment in areas for medical use Group 1 and group 2 within the patient environment to have selective protection with earth fault or equivalent protection with the following utløsestrøm:-most 30 mA for rates with overstrømsvern with the brand power up to and including 63 A.

-most 300 mA for rates with overstrømsvern with the brand power of 63 A.

Medical sites-protection against electrostatic discharge in the room where electrostatic discharge is associated with risk of patient and/or environments, to room have suitable anti-static flooring. Resistansen in the floor to meet the following conditions:-greater than 50 kΩ (when the nominal voltage of the plant are not over 500 V)-larger than 100 kΩ (when the nominal voltage is above 500 V)-Resistansen shall not exceed 25 MΩ.

Measurements should be made in the patient environment and other relevant areas. If this measure is used as protection against ignition of flammable anesthetics, to electro-medical equipment used be of type AP or APG.

2. Electrical installations in hazardous areas (other than mines) the use of pipe systems the use of pipe installations in hazardous areas are not considered to meet the forskriftens safety requirements.

Annex II, Attachment content does not render here. It can be obtained by contacting the Directorate for civil protection and emergency preparedness, PO box 2040, 3103 Tønsberg, Tel. 33412500, fax 33310660.

Guide to the regulations for electrical low voltage plants.

Established by the Product and electricity authority (now the Directorate for civil protection and emergency preparedness) 6. November 1998 under the legal authority of the Act 24. in May 1929, no. 4 about the supervision of electrical installations and electrical equipment section 2. Up to date with the change last 6 nov 2003 Nr. 1316. Preface the regulation is set out in pursuance of law 24. in May 1929, no. 4 about the supervision of electrical installations and electrical equipment. The purpose of the regulation is to achieve the proper security by projecting, execution, changes and maintenance of electrical low voltage installations and by the use of equipment connected to such facilities.
The regulation replaces regulations for electrical building installations and more of 20. December 1989 and will take effect from the 1. January 1999.
The scope of the regulation is mainly the same as for regulations for electrical building installations m. m, i.e. It encompasses a wide range of different types of low voltage facility that is associated with an external supply system or for your own generator, solar panels, etc. Electrical low voltage plants are plants with the highest nominal voltage and 1000 V alternating current or direct current 1500 V used in the.

-housing-places with commercial business (offices, shops, workshops, etc.)

-public sector-hospitals and other health institutions (private and public)-industry-agriculture and horticulture-prefabricated buildings-caravans, camping sites and corresponding-construction sites, exhibitions, fairs and other time-limited companies-marinas.

In addition, the Regulation provisions on plants that generators, emergency and reserve power supply etc. The list of active site are intended as examples and are not exhaustive.
Requirements to the design, execution and marketing of equipment and material that together make up the plant or to connect this is not regulated in this regulation and the norms that the regulation refers to. This is regulated in their own forskrifter1 which is based on EU directives. Regulations and the standards it refers to govern, however, the execution required from. the stresses that equipment and material are expected to be exposed to in the current facility.
The provisions of the regulations for electrical building installations and more applicable to electro-medical equipment expires and is covered by their own forskrifter2. Facilities in health institutions such as the electro-equipment is connected to the covered by the regulations and the standards these regulations refers.
The regulation takes into account that since the regulations for electrical building installations and more came into effect has been a development in the laws that protect consumers in connection with the purchase of craftsman services and governing responsibility on disposal of real estate.
The regulation is a functional regulation regulation on systematically adapted to health, environment and security work in businesses (internal control regulations).
That regulation is functional implies that the regulation does not contain detailed technical requirements for the execution of the low voltage plant, but provides basic security requirements showing which hazards regulation aims to guard against. The regulation refers to the norms that describe how the security requirements can be met. Regulation with the guidance and the norms that are shown to, the overall it security level that is to be added to reason. However, it is only the regulations which are legally binding so that one can choose other solutions. By the choice of other solutions that could need to be documented. by analysis of the risk that at least equivalent security is achieved as if they are the standards the regulation refers to should be assumed. If it turns out that there is conflict between the security requirements the regulation sets and solutions as standards or any alternative solutions adds to the reason, is it forskriftens security requirements to be met.
Customization to the internal control regulations means that of the regulations is added to clarify responsibilities. An important change in relation to the regulations for electrical building installations and more is that the person responsible for the businesses that project, perform or own plant is responsible for that forskriftens requirements. However, taking into account that the regulations owners of private homes and holiday houses are not covered by the internal control regulation because they are not to look at the businesses. On the other hand, agriculture and animal husbandry in this context businesses so that the plant used in such business is also covered by the internal control regulations.
The regulation puts responsibility on those who at any given time affects the security of the facility and equipment associated with this from the plans and works proceed and out the plant's lifetime. The regulation therefore operates with several that are imposed on the obligation to meet the forskriftens requirements:-engineers, eg. consulting engineers-the performing, eg. installation-owner/Builder user.

In the regulations for electrical building installations, etc. is the responsibility of the facility's security satisfactory added on it that perform the plant, normally the installer. However, it has been shown that this has unfortunate consequences because the security level of the current plant already is added by the engineering. It is therefore necessary that those who plant project for the work attributed responsibility they perform on a par with those of the actual execution. Regulations to account for that in many cases, the (n) that project and carry out plants will be one and the same business.
The responsibility as the one who performs facility has for that it meets forskriftenes requirements are not changed in this regulation in relation to the regulations for electrical building installations, etc.

In relation to the regulations for electrical building installations and more is the Builder introduced as own duty subject on equal footing with the owner. The rationale for introducing the Builder as own duty subject is that it will put this able to better fulfill its obligations as a future owner of direct involvement in the decisions taken during the execution of the plant. During the performance of the facility will be the owner/Builder as the supervisory authority will targeting by an order directed to the execution of a concrete plant.
User will as of today be the that uses the facility i.e. equipment that is associated with the plant. User is not necessarily the owner of the plant, but can be the tenant.
Owner/builder and user can be businesses, and falls under the requirements, accordingly, that the internal control regulation provides the systematic adherence to regulations. In many case, however, will these be individuals and thus not subject to the requirements of internal sets.
In the regulations for electrical building installations and more is the requirement that the plant will be both forhåndsmeldes and either to be reported as finished Product and electricity authority (now the Directorate for civil protection and emergency preparedness) or the local eltilsyn (DLE). In this regulation is the requirement of the finished message, but it dropped to manage the execution of the plant have a duty to send a message before the work starts. The message's content is limited to the information that is required to exercise the public audit. The supervisory authority must out from an assessment of risk determine how authority should be exercised in each case.
It is introduced for any duty which is responsible for the engineering, construction or alteration of a facility to issue a statement that will be delivered owner that the plant is planned, conducted and controlled so that it meets the security requirements of the regulations. This duty is linked with a requirement that it should be worked out technical documentation and a description of the plant. The requirement description Specifies the minimum information that should be released with respect to how the plant is carried out. Such a description will have practical importance eg. When another installer from the one that has carried out the facility to make maintenance, expansion of the plant and the like. Especially important is it to have such documentation available when the now separated from the regulation description of procedures, choice of solutions, etc. and allows for the use of alternative solutions. Owners of the plant have a duty to keep the updated documentation of the facility.
The regulation requires that the planning of the facility should be made a total review of all matters pertaining to the resort's area of application to ensure that it is fit for purpose. The choice of solution for the plant to be based on the assessment of the risks associated with the current facility. The result of this review the documentation to be submitted for the plant visit.
Product and electricity authority 6. November 1998 Guidance to § 1 electrical safety includes the identification that electricity represents in itself, as berøringsfare and fire, the safety conditions related to the use of electricity and electrical equipment. Electrical safety include the following:-protection against berøringsfare,-protection against arc/varmgang (personal injury, fire, explosions),-protection against lightning,-protection against electrostatic discharge,-protection against that electricity is causing unwanted chemical processes (such as links),-protection against that electromagnetic fields get harmful impact on people and animals,-safe execution, Assembly and maintenance of electrical equipment,-safe system solution, execution, use, and maintenance of electrical systems,-ensure procedures and security measures when working on or near electrical systems ,-electromagnetic compatibility (compatibility), reliability in the power supply,-quality of power supply,-consequence-/consequential damages.

But the safety of materials and equipment is covered in separate regulations.
Engineering is a comprehensive term that can cover everything from the detail planning, preparation of the description and drawings to facilities in larger buildings to the simple planning of a single course.

Guidance to § 2 high voltage equipment that can be connected to the low voltage plant is eg. discharge lamps, støvutskillere and more. The interface between the low voltage plant (this Regulation) and electrical supply facility is the intake for the low voltage plant, that's where your own energy supply to the plant's owner.
The regulation also includes low-voltage systems in motor vehicles (electric engine warmer, plants in caravans, mobile homes as well as in other vehicles for special purposes) that is not covered by the provisions of the State's managed roads, public roads.
Guidance on the conditions that the regulation does not apply to: Electrical supply system are covered by separate regulations set forth by the Product and electricity authority (fea-f) electrical systems aboard the ship and sea tools ...
Covered by the tradition established by the Product and electricity authority (fea-m) electrical systems at facilities in the petroleum business is managed by the Norwegian Petroleum Directorate electrical systems in the aircraft is managed by the FAA Electronic telecommunications and information systems managed by the Post and telecommunications authority Guide to section 6, If the engineering has been started before the regulation enters ikraft, but the end is brought after, in the 01.07.99 minimum requirements in this section 12 forskriftens for control , Declaration of conformity and documentation be met.
Last paragraph of section 10 deals with the combination of the parts of the norms. This is not, however, preclude that, if the requirements of the facility or any part of it is better covered in NEK 400 than in part 2-8 of the regulations for electrical building installations, etc. that the requirements of the NEK 400 can be added to reason. For example, the chapters on protection against overvoltages and electromagnetic interference, the requirements for grounding of equipment for electronic data processing.

Guide to the section 7 owners of distribution network is imposed by the Directorate for civil protection and emergency preparedness to oversee the electrical systems that are associated with the person in question supply facility. Businesses that are imposed such liability is governed by the Directorate for civil protection and emergency response control authority.

Guide to section 8 according to law 10. February 1967 on administrative matters concerning kap. WE, is the deadline to complain about 3 weeks from the time of notification of the decision is reached to the concerned party. The complaint shall be filed for the Government agency that has hit the decision.

Guidance to § 9 of the design and the execution phase of a facility is considered the Builder to be the owner of the plant.
Owner's/user's responsibility for the maintenance involves a duty to ensure that the facility at all times meets the requirements of chapter V. how extensive this will be depends on how complicated the plant is and the type of risk that is associated with the facility and the equipment that is associated with it. For example, to charge in a home could involve:-to be aware of the warning signs that occurs, as heat fuses and Sockets, lysbuer/sparks or near-miss to lysbuer,-to get controlled the plant on the basis of such danger signals, and to get rectified the deficiencies that are uncovered.

In an industry business will it could be many other factors that also need to be taken into consideration, depending on the nature of business.
For businesses that are covered by the regulations on the systematic health, environmental and safety work in businesses (internal control regulations) will routines to ensure this responsibility be included in that person's internal control.
Who can make intervention in a facility regulated by the regulations on the qualifications for electrical professionals. For ordinary consumers, and others who do not have the required qualifications involves the responsibility for maintenance, thus that one engages electrical subjects people who can make the inspection and any fixes.
In addition to the maintenance on the basis of the danger signal or damage, it should also be made a regular inspection of the plant e.g. every ten years in housing and other facilities with similar levels of risk. In businesses (industry, agriculture, etc.) may be required with the far more frequent inspection.
Beyond the owner's/user's general responsibility is any that make planning/engineering, construction, maintenance, development, etc. of a system responsible for ensuring that the specific work undertaken meets the current safety requirements. The person in charge will normally be a company/business, but individuals may be responsible, eg. If you are qualified to perform facility in your own home.

Guidance to § 10 Norm which describes how the security requirements in chapter V can be met:-NEK 400 low-voltage Electrical installations, part 2-8, with the changes that are specified in Annex i to this regulation.

-NEK 420 electrical installations in hazardous areas For the routing of cables please refer also to the NEN 62.75 Power cables-load tables.
For the execution of electrical distributions please refer to NEK 439 Lavspenningstavler and channel rail systems.
It is assumed that at any given time is used the latest edition of the specified standards. The references are therefore undated and without reference to which edition that added to the reason.
"Norm" and "default" are synonymous terms. In this regulation be used consistently the term "norm".

Guide to section 11 The security requirements that are designed in the regulations is the Directorate of security for the social and emergency response opinion so basic that it is only in very special cases, be appropriate to provide an exemption from them.

Guidance to § 12 Liability in relation to the electrical systems is regulated in section 9.

The regulation does not specify specifically which parts of the documentation, however, responsible for the RESP engineering and responsible for the execution to deliver owner. Where engineering and workmanship is distributed on several players it must therefore be a coordination between these so that the overall documentation provided the owner meets the regulations.
The provision does not preclude that there be issued a joint statement that includes both planning and execution and that must be signed by all involved actors.
Declaration of conformity must contain the following:-name and address of the responsible for the design, construction or modification of the facility.

-Identification of the plant, including the address.

-Designation of the norms used in whole or in part, or other technical specifications as the facility is based on in the case of norms is not used.

-assurance that the facility meets the requirements for safety in this regulation.

-signature of the person responsible for the engineering, construction or modification of the facility.

-the date of the statement.

In annex II, it is shown example of such statements of conformity.
Documentation that is the substrate to be able to issue a declaration of conformity must. include the following:-a description of the plant of which the following should be noted in particular:-the Type and composition of circuits (type of outlet that supplied, the number of managers and head cross section, the distribution way).

-Principled structure of the circuits with the reference system, operating and fixed tagging. Circuit form should provide complete information about the connection between components/armaments and describe the behavior.

-Data necessary to identify the policy, frakoblings-and bryterutstyr and such komponenters location.

For simple systems can this description instead consist of a course record or the like.

-a list of spent and optionally a description norms of solutions that are chosen to meet the overall requirements in the regulations when the norms are not used.

-the results of the calculations and risk assessment etc, cf. section 16 with the guidance, report from the control as mentioned in the first paragraph.

At the change of the need for the facility will have to made up the preparation of the new documentation be considered specific. By minor changes, it can be sufficient to make plots, correction etc. on existing documentation.
NEK has released the norms that are relevant for the design of documentation.
Elektrotekniske calculations are necessary if the fulfillment of forskriftens security requirements can not be verified in any other way. Scope of the risk assessment is strongly associated with the plant's complexity and the assumed risk, for simple systems with low risk is considered such reviews not required.

Guide to the section 13 the provision to ensure that updated documentation is available and can be added to the reason for the inspection, maintenance, development, and other changes.
The provision in the second paragraph about the duty of the storage of the Declaration for at least five years corresponds to the maximum time limit for returns and exchanges according to the law on craftsmanship and more for consumers and the law on the disposal of fixed eigedom.

Guide to section 14 For the facilities associated with a supply facility that is subject to the supervisory responsibilities (see section 7 of guidance) message is sent to the person concerned the electricity works.
With "minor modifications" refers to changes that do not affect the protection against overstrøm including protection against overload and short circuit.
With the "use of the facility" means the description for what purpose the plant to use (residential, school, industry, agriculture, etc). If the plant or parts of it is exposed to special external influences is indicated eg. with the code indicated in table 51 400 NEK.
Fixed facility that supplied from a power generator is the message even if subject to the aggregate performance lower than 10 have kVA.
Facilities that are exempt from the message, e.g. 12 V solar plant, to meet the requirements of security anyway in this regulation.

Guide to the section 15 Report duty by accidents/mishaps intends to contribute to the cause can be found, and thereby to help to prevent further damage and new accidents. It is important that the message be given quickly, eg. by telephone, fax or electronic mail, so that the necessary measures can be taken to ensure that the information that may be of importance to clarify the cause will not be damaged or removed.
Messages that are sent by fax or electronic mail will be confirmed by the Directorate for civil protection and emergency preparedness.
For the message of the accidents with personal injuries have the Directorate for civil protection and emergency prepared a form "report on elulykke with personal injury."

Guide to section 16 Elsikkerhetsbegrepet (see Guide to section 1) implies. a total assessment of the conditions pertaining to the resort's area of application to ensure that it is fit for purpose.
The choice of solution for the plant together with the necessary protection and other protective measures requires the assessment of the risks associated with the current facility. This also implies that the facility should have satisfactory reliability in electricity supply by giving effect to the protection against disruption and selectivity for the protection.
Examples of places where it is needed with special consideration of risk is the plant in-hospital,-hazardous sites, hotels,-agriculture,-industrial companies and other business activities.

Guidance to § 17 By planning and execution is an assessment of the frequency and extent of the maintenance of the facility that can reasonably be expected. In this review, it must be taken into account. that-any periodic inspection, testing, repair, etc. that are needed must be carried out safely and easily, and that the effectiveness of security measures-are secured.

Guidance to § 18 in order to achieve a secure facility, it is provided that the various distribution systems must be equipped with protective measures adapted to the characteristics of each type of distribution system (TN, TT and IT). For example, in a distribution system with grounded zero point (TN, TT) by soil inference of stage managers (L1, L2 and L3) result in as great power that it will be necessary with fast shut-off to protect against dangerous current flow and for high temperatures (fire). In the system with isolated zero point (IT) will not be required with the shut-off at the first jordfeil, but adequate measures must be taken to uncover and remove such errors within a reasonable time. By overstrøm is assumed it normal that protection (fuses) is triggered regardless of the distribution system.
If the disruption by mistake can lead to danger for people, pets or property must system with isolated zero point is used if no other equal measures, cf. section 31. Example where such mistakes can lead to danger, the room its group 2 in medical areas.
In systems using combined neutral leader and protective leader (TN-C-system), is the PEN-leader energized and is believed to have the potential difference in relation to the soil. This stream may also contain overharmoniske components and often have undefined returvei to the transformer's neutral point. TN-C system is considered therefore not as suitable distribution system in a low-voltage system. TN-C system can, however, be used up to the building's first distribution.
See also annex I guidance to section 20 Protection can be achieved by-to prevent people and animals are exposed to current flow, or by-to limit such power to the harmless size.

Guidance to § 21 Protection can be achieved by-to prevent people and animals are exposed to current flow, or by-to limit such power to the harmless size, or by-to make sure the automatic shut-off of the power supply when there is a failure that can lead to dangerous current flow for people or pets that are in touch with the exposed parts.

The provision entails in practice that in the TT-system can only be met by the use of power-driven soil protection error.

Guidance to § 22 it must be taken especially into account the danger of high transition resistance in the termination points of the cables/wires. This could lead to dangerous heat development and in some cases fire. Such danger situations can occur as a result of unsatisfactory fastening of the management or permanent strain of the cable/wire up against cable retainer to maximum strømføringsevne.
Engineers/Executive must be especially aware that such abnormal heat generation in the contact points can cause the insulation material emits gases that are corrosive and may affect the transition resistance over time. To prevent such danger occurs must coordination between overload protection and cable strømføringsevne be carefully considered.
By avmantling of insulation it is especially important to use suitable tools that do not damage the cable/cable retainer leader material.

Guidance to § 23 Overstrøm for managers is any power higher than the allowed strømføringsevne, eg. as a result of overload, short circuit etc. Protection can be achieved by-to make sure the automatic shut-off of so overstrøm before this guess dangerous size, duration, considering, or by-to limit such overstrøm to the harmless size and duration.

It will be shown by the way to the guidance in section 22.

Guidance to § 25 The 2. paragraph shall apply the protection against conditions that are caused by:-transferred surges in the allocation online due to atmospheric discharges-that occurs in surges the low voltage plant due to the input and disconnection of equipment in or associated with the plant-other surges, eg. as a result of jordfeil in the high voltage system.

To reduce the likelihood of injury due to surges so-that it is achieved an acceptable level of security for people, domestic animals and property and that the requirements for the desired operational security can be met, there must be an assessment of the surges that can-act at the low voltage plant's intake,


-the expected Thunder aloft frequency and location and properties of the equipment to protect against power surges.

The number of injuries related to the frequency of atmospheric discharges can often be higher in Norway than in the Central European countries. This is due to natural conditions. As a result of the international norms do not take into account this can be required with additional protection against surges after assessment of the local conditions.

Guidance to § 26 Engines. by unexpectedly starting can cause hazard for service or for the plant's security, must have zero voltage disconnection unless there is a particular disadvantage for the operation. It must then meet measures other protection against danger.

Guidance to § 27 Clause means that the plant must be dimensioned so that the voltage drop under normal conditions is not greater than that specified for the individual equipment which are included in or are connected to the facility. For equipment that has a high innkoblingsstrøm and/or short-lived high charges, it must at the same time be considered on other equipment can be exposed to unwanted influence.

Guide to the section 31 examples of systems where interrupts can cause hazard, facilities in-hospital-major hotels-industrial agriculture and industrial companies.

By the use of life support equipment, electro-medical in private homes and care institutions will interruptions in the power supply to the equipment cause danger.
Separate "independent" supplies from the normal supply are not considered suitable for emergency power source.

Guidance to § 32 By on/off switches and control devices, it must be clear and permanent marking that specifies which parts of the plant they serve, if there is a risk of confusion.
When the sequence of operation of the switches and control equipment cannot be observed by the making service and this can cause hazard, it must, visible from the control site, be appropriate job selection/indication according to the current regulations/standards.
Cables and conductors must be so installed and/or the brand that they can be identified by supervision, testing, troubleshooting, repair and by changes in the plant. Land managers and neutral leaders must be able to be identified by all the connections, using the prescribed marking. In moving the wires must be labeled such leaders throughout its length.
Land managers must be selected in the entire its length when it is not obvious that the leader is an Earth conductor and that it thus could be broken accidentally.

Guide to the section 33 For the requirements of the electromagnetic compatibility (EMC) to be met there must at the planning and execution of a plant be taken into consideration the instructions that the manufacturer of each part have given with regard to EMC. Also that equipment, material etc that are used and the fixed way is adapted to the special conditions in the specific plant. Special EMC problems that occur in a facility must often be solved jointly by the people involved, such as equipment manufacturers, engineers and the performing parties.
Facility that is not designed to be moved, that facilities in the buildings, etc., are not to be CE marked. It is also not necessary with special declaration for the fulfillment of EMC-requirements or the use of a competent organ.
Facility that is designed to be moved and used various locations (e.g. vehicles for radio/television transmission), can both be subjected to and cause changes in the electromagnetic environment. Because these can operate within the whole European economic area, they shall meet the EMC policies also with regard to CE marking, Declaration and any use of the competent authority.
If the plant that can be moved is designed to replace or extend a stationary facility (e.g. for the production of electricity), it is considered as a part of the desktop system.

Guidance to § 34 provision has. intended to prevent non-electric fixed parts are the voltage put on because of how electrical equipment or materials is carried out, placed and mounted and that it is sufficient to distinguish between established fire electrical equipment and flammable parts of the building surface.

Guidance to § 35 planning and building Act and the associated regulations have supplementary provisions on this.

Guidance to § 36 execution and sales of electrical equipment is regulated in separate regulations.
The provision means. that the equipment should be connected to and used to manufacturer's instructions prescribes. Equipment that is intended to be connected by ordinary consumers can emit heat. This is the case. lighting equipment, radio, tv, etc. These must be placed so that the ventilation is not obstructed. Certain types of lighting equipment that so called taunting, give off excessive heat. By burning-lighting fixtures it must therefore be made assessment of the fire safety properties.

Guidance to § 38 With equipment designed to be moved during use will mean usage AIDS. vacuum cleaner and electric hand tools.

Attachment In.

National adaptations this appendix includes the customizations that are required for the standards the regulations refer to, can be added to the reason for the fulfillment of the security requirements, cf. forskriftens § 10.

Allowable voltage systems the following AC systems can be used on the following conditions: TN-S: For all purposes up to and including 230/400 V except in areas for medical use or for emergency power supply.
For facilities in the industry and for special purposes as well with nominal voltage 690 and 1,000 V, but not for light, room heating and conditioning for the control streams, etc.
TN-C-S: For the supply of plant with nominal voltage up to and including 230/400 V as TN-C system until the first distribution. To the distribution used the TN-S system.
For facilities in the industry and for special purposes as well with nominal voltage 690 and 1,000 V, but not for light, room heating and conditioning for the control streams, etc.
TN-C system is used not for distribution in building installations.
TN-C system is not allowed in the explosive area.
TT: For all purposes with nominal voltage up to and including 230 V, except for medical use or for emergency power supply.
It: For all purposes with nominal voltage up to and including 230 V. For facilities in the industry and for special purposes as well with nominal voltage 400, 690 and 1,000 V, but not for light, room heating and conditioning for the control streams, etc.
Also, the following direct current systems are used: TN and TT: For all purposes with nominal voltage up to and including 220 V, with grounded center point up to and including 400 V. For special purposes in facilities in the industry, eg. electrolysis, and for the electrical path up to the plant, and with 1,500 V. IT: For all purposes with nominal voltage up to and including 220 V. For special industrial purposes up to and including 1,500 v. (NEK 400:312) Strain of the PVC-insulated cable By use of PVC-insulated cable with small cross section to the protection against overload is selected so that the highest power-try the vernets I2 does not exceed the maximum cable strømføringsevne IZ or-vernets highest try does not exceed the highest power I2 try power that is used for the material in the circuit.

With small cross section cross section up to the means and with 4 mm2. (NEK 400:433.2)

It system, the use of N-leader in the IT system be used not N-leader in Norway, this is highly recommended also in IEC/TR3 61200-413 Electrical installation guide-Clause 413: Explanatory notes to measures of protection against indirect contact by automatic disconnect of supply. (NEK 400:312.2.3, etc.)

TT-system, the use of protection in order to achieve the necessary protection against electric shock in case of error, in the TT-system in practice only be used power controlled soil protection. errors (NEK 400:413.1.4.4)

Need power supply, supply Separate "independent" supplies from the normal system of supply is considered not suitable for emergency power source. (NEK 400:351)

Need power supply, security measures against electric shock safety measures against electrical shock should not be based on automatic disconnection at the first error. (NEK 400:561.2)

The cable plant in escape routes this section defines the conditions that are attached to the interface with the planning and building Act (and its associated regulations and guides) provisions on technical facilities in escape routes.
The cable system shall preferably not be misplaced in the escape roads. If such laying on cannot be avoided, should the line be equipped with cloak or enclosure that cannot contribute to or spread the fire or assume such a temperature that the surrounding material can ignite within a time period set out for escape routes.
Cables should not be added behind the ceiling or corresponding cavities in the escape route with smaller cables represent the small fire load-the cables are led in your own shaft with shaft walls that have fire resistance equivalent branncellebegrensende building part-the ceiling fire resistance have corresponding branncellebegrensende building part-cavity is sprinklet.

The cable plant in the escape routes to misplaced lie out of reach, or be equipped with protection against mechanical damage that could possibly arise during the escape. Any cable plant in an escape route should be as short as possible.
Cladding or enclosure using combustible material covered with brannbeskyttende paint does not meet the requirements of this provision. (NEK 400:482)

The grounding of the piping systems Metallic piping systems shall not be used as Earth electrode. Such systems (hovedvannledninger, hovedrør for central heating systems, piping systems for flammable liquids or gases and the like) should be connected to the earthing plant via the leveling compounds.
When it comes to drain lines of insulating material, it should if the dangerous potential differences can occur between the drain and other leading parts, anordnes satisfying electrically conductive connection to the inside of the drainage pipe or drain. So leveling connection is not required if it can danger [2] may occur that do not. (NEK 400:542.2.1)

Disconnection


In TN-C systems to PEN-leader could only be disconnected or switched at the same time with all the phase conductors. Phase leaders should not be able to connect without at the same time the connection of PEN-leader. It is not recommended to disconnect the PEN-head when this also has function as protective leader.
In TN-S systems applies the same requirements to disconnect and shut-off of the N-leader as for the phase conductors. (NEK 400:461.2)

Electric heating system with forced air circulation Electrical heating system with forced air circulation (electric hot air heat recovery unit) will be in place for two independent thermostats have the thermostat and termoutløser. These should be independent of each other, connect the heating elements allpolig out in the event of high temperature in the air channels. Termoutløseren should not have automatically gjeninnkopling. (NEK 400:424.1.1)

Access to overstrømsvern Overstrømsvern should be mounted on the Tablet, stand, closet or similar. (NEK 400:513)

Access to the boards, racks and cabinets, device allocation Apparattavler racks and distribution cabinets should be just clear and be easily accessible. They shall be carried out by ubrennbart and mechanical resistant material, or of other material approved for the purpose, or be placed in their own fire cell at least of the class B 30.
In the machine room should not occur any unauthorized pipe for water, steam, gas or the like. (NEK 400:513)

Marking of the PE and N-PE-N leaders and managers should be labeled according to IEC 60 446.
Insulated PEN-leaders should be labeled green/yellow through the whole length with the addition of light blue markings at the termination points. (NEK 400:514.3)

Selection of the control devices for the link in case of emergency (including emergency stop) Control device (handle, push button and the like) for nødutkobling should be clearly marked red against a yellow background. It will be shown by the way to the Authority's regulations that implement similar provisions from the machine directive. (NEK 400:537.4.4)

Earth leaders in Earth Soil misplaced leaders misplaced in the soil should be of copper with the smallest cross-section 25 mm2 or of hot galvanized steel with minimum cross section 50 mm2.
Joints that cannot be inspected shall be welded with suitable method. It should be taken into account in particular the danger of corrosion. (NEK 400: Chapter 54)

Medical sites-power supply and distribution system in medical areas Group 1 and group 2 to at least the following rates be provided from the IT system:-All rates calculated on connection of electro-medical equipment.

-rates for operations and research, etc., nominal voltage lamps with higher than 25 V alternating current or 60 V ripple-free direct current.

In medical areas Group 1 and group 2 should all sockets to be associated with the IT system. If this is not the case, the outlets be specially marked.
TN and TT system is still allowed for the following Exchange rates, under the assumption that the interruption of treatment, examination or monitoring can take place without danger or significant disadvantage for the patient:-Rates only for the connection of the x-ray equipment.

-Quotes intended for equipment with power needs of 5 kW.

-Rates that are not intended for connection of electro-medical equipment, and where connected equipment may not come within the "patient environment".

TN-system to be TN-S system, as far as possible from the transformer or generator.
Equipment that cannot be used within the patient environment must normally be hard-wired, or at least stationary. (NEK 400:710)

Medical sites-Protection by automatic disconnection of the power supply in the TN system rates that supplies equipment in areas for medical use Group 1 and group 2 within the patient environment to have selective protection with earth fault or equivalent protection with the following utløsestrøm: most 30 mA for rates with overstrømsvern with the brand power up to and including 63 a. Most 300 mA for rates with overstrømsvern with the brand power of 63 a. (NEK 400 : 710) medical sites-protection against electrostatic discharge in the room where electrostatic discharge is associated with risk of patient and/or environments, to room have suitable anti-static flooring. Resistansen in the floor to meet the following conditions: greater than 50 k Ω (when the nominal voltage of the plant are not over 500 V) greater than 100 k Ω (when the nominal voltage is above 500 V) Resistansen shall not exceed 25 M Ω. Measurements shall be made in the patient environment and other relevant areas. If this measure is used as protection against ignition of flammable anesthetics, to electro-medical equipment used be of type AP or APG. (NEK 400:710)

NEK a 60079-14 electrical installations in hazardous areas (other than mines) the use of pipe systems the use of pipe installations in hazardous areas are not considered to meet the forskriftens safety requirements.
(Section 9.4 and 10.5)

Annex II.

Statement that the execution is in accordance with the regulations for electrical low voltage installations (see section 12) Installer: address: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Type of plants: address: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Spent norms (see forskriftens, section 10): Nr Name Any other technical specifications: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ the undersigned declare that the plant is controlled and meets the security requirements in chapter V forskriftens. Documentation according to § 12 is handed over ownership of the plant. 

Place/date Signature/company's stamp Given name: position: (block letters) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ statement that engineering is in accordance with the regulations for electrical low voltage installations (see section 12) Projected by: address: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Type of plants: address: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Spent norms (see forskriftens, section 10): Nr Name Any other technical specifications: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ the undersigned declare that the plant is planned to meet the security requirements in chapter V forskriftens. Documentation according to § 12 is handed over ownership of the plant. 

Place/date Signature/company's stamp Given name: position: (block letters) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _