Law 31/1995 of 8 November on the Prevention of Occupational Risks determines the basic body of guarantees and precise responsibilities to establish an adequate level of protection of workers ' health against the risks arising from working conditions, in the framework of a coherent, coordinated and effective policy. According to Article 6 of the Directive, the regulatory standards will be those which will be laid down and the most technical aspects of preventive measures.

Thus, it is the regulatory development rules that should set the minimum measures to be taken for the proper protection of workers. These include those aimed at ensuring the protection of workers from electrical risk.

Likewise, the safety and health of workers have been the subject of various International Labor Organization Conventions ratified by Spain and which, therefore, are part of our legal system. It stresses, as a general rule, the Convention No. 155 of 22 June 1981 on the safety and health of workers and the working environment, ratified by Spain on 26 July 1985. In the same sense, in the field of the European Union, criteria of a general nature on the actions in the field of safety and health at work have been established, as well as specific criteria relating to measures to protect against accidents and risk situations.

The objective of this standard is to update the regulations applicable to works with electrical risk, while the repeal of Chapter VI of the General Ordinance on Safety and Hygiene at Work, approved by Order of 9 March 1971, replacing it with a regulation in accordance with the new legal framework for the prevention of occupational risks, consistent with the European rules to which reference has been made and in line with the current reality of relations labor.

Under Article 6 of Law 31/1995 of 8 November on the Prevention of Occupational Risks, on the proposal of the Ministers of Labour and Social Affairs, Health and Consumer Affairs and Science and Technology, The most representative business and trade union organizations, the National Committee on Safety and Health at Work, have been consulted in agreement with the Council of State and after deliberation by the Council of Ministers at its meeting on 8 March. June 2001,

DISPONGO:

Article 1. Object, scope, and definitions.

1. This Royal Decree establishes, within the framework of Law 31/1995 of 8 November, the Prevention of Occupational Risks, the minimum safety requirements for the protection of workers from the electrical risk in the places of job.

2. This Royal Decree applies to the electrical installations of the workplaces and to the techniques and procedures to work on them, or in their vicinity.

3. The provisions of Royal Decree 39/1997 of 17 January 1997 on the Regulation of the Prevention Services shall apply in full to the whole of the field referred to in the preceding paragraphs, without prejudice to the provisions of this Regulation. specific contained in this Royal Decree.

4. For the purposes of this Royal Decree the definitions laid down in Annex I shall apply.

Article 2. Obligations of the employer.

1. The employer must take the necessary measures to ensure that the use or presence of electrical energy in the workplace does not lead to risks to the health and safety of workers or, if this is not possible, to such risks are reduced to a minimum. The adoption of these measures shall be based on the assessment of the risks referred to in Article 16 of the Occupational Risk Prevention Act and Section 1.^a of Chapter II of the Prevention Services Regulation.

2. In any case, for the purpose of preventing electrical risk:

(a) The characteristics, form of use and maintenance of the electrical installations of the workplaces must comply with the provisions of Article 3 of this Royal Decree and, in particular, the provisions to which it is refers to in paragraph 4 of the same.

(b) The techniques and procedures for working in, or in close proximity to, electrical installations shall comply with the provisions of Article 4 of this Royal Decree.

Article 3. Electrical installations.

1. The type of electrical installation of a place of work and the characteristics of its components must be adapted to the specific conditions of the place itself, the activity developed in it and the electrical equipment (receivers) which will be be used.

To this end, account must be taken of factors such as the driving characteristics of the workplace (possible presence of very conductive surfaces, water or humidity), the presence of explosive atmospheres, flammable materials or corrosive environments and any other factors that may significantly increase the electrical risk.

2. Only electrical equipment for which the system or mode of protection provided by its manufacturer is compatible with the existing type of electrical installation and the factors referred to in paragraph 1 may be used in the workplace. previous.

3. The electrical installations of the workplaces shall be used and maintained in the appropriate manner and the operation of the protection systems shall be regularly monitored, in accordance with the instructions of their manufacturers and installers, if exist, and to the exploiter's own experience.

4. In any case, the electrical installations of the workplaces and their use and maintenance must comply with the requirements of the electrotechnical regulation, the general safety and health regulations on workplaces, work equipment and signage at work, as well as any other specific regulations that apply to them.

Article 4. Work techniques and procedures.

1. The techniques and procedures used to work in or in the vicinity of electrical installations shall be established taking into account:

(a) The assessment of the risks that the work may entail, taking into account the characteristics of the facilities, the work itself and the environment in which it is to be carried out.

(b) The requirements set out in the other paragraphs of this Article.

2. Any work in an electrical installation, or in its proximity, which carries an electrical risk shall be carried out without tension, except in the cases referred to in paragraphs 3 and 4 of this Article.

To leave the electrical installation without tension, before performing the work, and for the replacement of the voltage, upon completion, the general provisions laid down in Annex II.A and, where applicable, the provisions shall be followed. particulars set out in Annex II.B.

3. May be performed with the installation in tension:

(a) Elementary operations, such as for example connecting and disconnecting, in low voltage installations with electrical equipment designed for immediate and non-risk use by the general public. In any event, these operations shall be carried out by the normal procedure provided by the manufacturer and after verification of the good condition of the material handled.

(b) Work in installations with safety stresses, provided that there is no possibility of confusion in the identification of the same and that the intensities of a possible short circuit do not pose a risk of burn. Otherwise, the established working procedure shall ensure the correct identification of the installation and avoid short circuits when it is not possible to protect the worker from the installation.

4. They may also be performed with the installation in tension:

(a) Manoeuvres, measurements, tests and verifications whose nature so requires, such as the opening and closing of switches or dryers, the measurement of an intensity, the carrying out of tests electrical isolation, or the verification of phase agreement.

(b) Work in, or in proximity to, facilities whose operating conditions or continuity of supply so require.

5. Except in the cases referred to in paragraph 3 of this Article, the procedure used for the performance of stress work shall comply with the general requirements laid down in Annex III.A and, in the case of high voltage work, the additional requirements set out in Annex III.B.

6. The manoeuvres, measurements, tests and electrical checks shall be carried out in accordance with the general provisions laid down in Annex IV.A and, where applicable, the special provisions laid down in Annex IV.B.

If, during the performance of these operations, the danger zones of surrounding tension elements are to be dealt with or may be accidentally invaded, the provisions of paragraphs 5 or 7 shall apply as appropriate. of this Article.

7. Work carried out in the vicinity of voltage elements shall be carried out in accordance with the provisions of Annex V, or shall be considered as stress work and the provisions corresponding to this type of work shall apply.

8. Without prejudice to the provisions of the previous paragraphs of this Article, work carried out at sites at risk of fire or explosion, as well as processes in which a dangerous accumulation of load may occur electrostatic, shall be carried out in accordance with Annex VI.

Article 5. Training and information for workers.

In accordance with Articles 18 and 19 of the Law on the Prevention of Occupational Risks, the employer must ensure that workers and workers ' representatives receive adequate training and information on the the electrical risk, as well as the prevention and protection measures to be taken pursuant to this Royal Decree.

Article 6. Consultation and participation of workers.

The consultation and participation of workers or their representatives on the matters referred to in this Royal Decree shall be carried out in accordance with the provisions of Article 18 (2) of the Law on the Prevention of Occupational Risks.

Single repeal provision. Regulatory repeal.

The provisions of the same or lower rank shall be repealed as set out in this Royal Decree and, expressly, Chapter VI of Title II of the General Ordinance on Safety and Hygiene at Work, approved by Order of 9 March 1971.

Final disposition first. Technical Guide.

The National Institute of Safety and Hygiene at Work, in accordance with the provisions of Article 5 (3) of Royal Decree 39/1997 of 17 January, approving the Regulation of the Prevention Services, develop and keep up to date a non-binding technical guide for the assessment and prevention of the electrical risk in the work carried out in the electrical installations of the workplaces, or in the vicinity of the same.

Final disposition second. Faculty of development.

The Minister of Labor and Social Affairs is authorized, after a favorable report by the Ministry of Health and Consumer Affairs and Science and Technology, and after the report of the National Commission on Safety and Health at Work, to be issued any provisions necessary for the implementation and development of this Royal Decree, as well as for the strictly technical adaptations of its Annexes, in the light of technical progress and the evolution of the rules or international specifications or knowledge on the subject of protection against electrical risk.

Final disposition third. Entry into force.

This Royal Decree will enter into force two months after its publication in the "Official Gazette of the State".

Given in Madrid to June 8, 2001.

JOHN CARLOS R.

The Minister of the Presidency,

JUAN JOSE LUCAS GIMENEZ

ANNEX I

Definitions

For the purposes of the provisions of this Royal Decree, it is understood as:

1. Electrical risk: risk caused by electrical energy. The risks of:

are specifically included.

a) Electrical shock by contact with elements in voltage (direct electrical contact), or with masses accidentally put into stress (indirect electrical contact).

b) Burns by electric shock, or by electric arc.

c) Fall or strokes as a result of shock or electric arc.

d) Fire or explosions caused by electricity.

2. Place of work: any place that the worker can access, due to his or her work.

3. Electrical installation: the assembly of the materials and equipment of a place of work by which the electrical energy is generated, converted, transformed, transported, distributed or used; the batteries, the capacitors and any other equipment that stores electrical energy.

4. Working procedure: sequence of the operations to be carried out to carry out a specific work, including the material (work or protection) and human means (qualification or training of the staff) necessary to bring it to

5. High voltage. Low voltage. Security tensions: those defined as such in the electrotechnical regulations.

6. Non-voltage work: works on electrical installations that are carried out after taking all the necessary measures to maintain the installation without tension.

7. Danger zone or zone of work in tension: space around the elements in tension in which the presence of an unprotected worker poses a serious and imminent risk of an electric arc, or a direct contact with the element in tension, taking into account the normal gestures or movements that the worker can make without moving.

Where a physical barrier is not interposed to ensure protection against that risk, the distance from the voltage element to the outer boundary of this area shall be as shown in Table 1.

8. Stress work: work during which a worker comes into contact with elements in tension, or enters the danger zone, either with a part of his body, or with the tools, equipment, devices or materials he manipulates. The manoeuvres and measurements, tests and verifications defined below are not considered to be in tension.

9. Maneuver: intervention designed to change the electrical state of an electrical installation by not involving assembly or disassembly of any element.

10. Measurements, tests and verifications: activities designed to verify compliance with the technical and safety specifications or conditions necessary for the proper operation of an electrical installation, including those intended to check their electrical, mechanical or thermal status, effectiveness of protection, safety or maneuver circuits, etc.

11. Proximity area: space around the danger zone, from which the worker can accidentally invade the area. Where a physical barrier is not interposed to ensure protection against electrical risk, the distance from the voltage element to the outer boundary of this area shall be as shown in Table 1.

12. Work in proximity: work during which the worker enters, or can enter, in the area of proximity, without entering the danger zone, either with a part of his or her body, or with the tools, equipment, devices or materials that manipulates.

13. Authorized worker: worker who has been authorized by the employer to carry out certain works with electrical risk, based on his ability to make them correctly, according to the procedures established in this Royal Decree.

14. Qualified worker: an approved worker who has expertise in the field of electrical installations, due to his or her accredited, professional or university background, or certified experience of two or more years.

15. Head of work: person appointed by the employer to take effective responsibility for the work.

Table 1. Limit distances from work zones *

n	DPEL-1	DPEL-2	PROX-1	DPROX-2
	≤ 1	50	50	70	300
3	62	52	112	300
		62	53	112	300
65		55	115	300
15	66	57	116	300
	20	72	60	122	300
30	82	66	132	300
45	98	73	148	300
	66	120	85	170	300
110	160	100	210	500
	180	110	330	500
	220	260	160	410	500
	390	250	540	700

* The distances for intermediate voltage values will be calculated by linear interpolation.

U_n = installation nominal voltage (kV).

D_PEL-1 = distance to the outer boundary of the danger zone when there is a risk of lightning surge (cm).

D_PEL-2 = distance to the outer boundary of the danger zone when there is no risk of lightning surge (cm).

D_PROX-1 = distance to the outer boundary of the proximity zone when it is possible to precisely delimit the work zone and control that the work zone is not exceeded during the work area (cm).

D_PROX-2 = distance to the outer boundary of the proximity zone when it is not possible to precisely delimit the work zone and control that the work zone is not exceeded during the completion of the work zone (cm).

ANNEX II

No-voltage jobs

A. General provisions

Operations and maneuvers to leave without tension a facility, before starting the "work without tension", and the replacement of the voltage, when finished, will be carried out by authorized workers who, in the case of installations of high voltage, must be skilled workers.

A. 1 Suppression of the voltage.

Once the zone and the elements of the installation where the job is to be performed are identified, and unless there are essential reasons to do otherwise, the process described below will follow, develops sequentially in five stages:

1. Unplug.

2. First Prevent any possible feedback.

3. Verify the absence of tension.

4. Put to ground and short circuit.

5. Protect against upcoming items in tension, if any, and set up security signage to delimit the work zone.

Until the five stages have not been completed, the start of the work may not be allowed without tension and the part of the affected installation will be considered in tension. However, in order to establish the safety signalling indicated in the fifth stage, the installation can be considered without tension if the previous four stages have been completed and no danger zones of nearby elements can be invaded. voltage.

1. Disconnect.

The part of the installation on which the job is to be performed must be isolated from all power supplies. The insulation shall be constituted by an air distance, or the interposition of an insulator, sufficient to ensure electrically such insulation.

Capacitors or other elements of the installation that maintain tension after disconnection shall be unloaded by appropriate devices.

2. Prevent any possible feedback.

The manoeuvring devices used to disconnect the installation must be secured against any possible reconnection, preferably by blocking the mechanism of manoeuvre, and must be placed, where necessary, a signs to prohibit the maneuver. In the absence of a mechanical lock, equivalent protective measures shall be taken. When using telemandated devices, the wrong maneuver of the devices should be prevented from the telematic system.

When a source of auxiliary power is required to maneuver a cutting device, it shall be deactivated or must be actuated in the elements of the installation so that the separation between the device and the source is insured.

3. Verify the absence of tension.

The absence of tension shall be verified in all the active elements of the electrical installation in, or as closely as possible, the working area. In the case of high voltage, the correct operation of the stress-absence verification devices shall be checked before and after such verification.

To verify the absence of tension in insulated cables or conductors that may be confused with other existing ones in the work zone, devices that act directly on the conductors (pinca-wires or cables) will be used. (a), or other methods shall be used, following a procedure which ensures, in any case, the protection of the worker against the electrical risk.

The telemarketing devices used to verify that an installation is without tension shall be safely operated and its position on the telematic must be clearly indicated.

4. Grounding and shorting.

The parts of the installation where you are going to work should be grounded and short-circuited:

a) In high voltage installations.

b) In low voltage facilities which, by induction, or for other reasons, may be accidentally put into stress.

Grounding and short circuit equipment or devices must first connect to the grounding and then the elements to be grounded, and must be visible from the work zone. If the latter is not possible, grounding connections should be placed as close to the work zone as possible.

If drivers need to be cut or connected in the course of the work and there is a danger of potential differences in the installation, protective measures such as bridges or bridges should be taken. land in the work area, before proceeding to the cut or connection of these drivers.

The drivers used to make the grounding, short circuit and, where appropriate, the bridge, must be suitable and have the section sufficient for the short circuit current of the installation in which they are placed.

Precautions will be taken to ensure that the grounding remains properly connected during the time the work is performed. When they have to be disconnected for measurement or testing, additional appropriate preventive measures shall be taken.

The telematic devices used for the grounding and short circuit of a facility shall be safely operated and their position in the telematic system shall be clearly indicated.

5. Protect against the next elements in tension and establish a security signaling to delimit the work zone.

If there are elements of a facility close to the work zone that have to remain in tension, additional protective measures must be taken, which will be applied before the work is started, as provided for in the Article 4 (7) of this Royal Decree.

A. 2 Reposition of the voltage.

The replacement of the voltage will only begin, after the end of the job, after all the workers who are not indispensable have been removed and the tools and tools have been collected from the work area. equipment used.

The stress replacement process will comprise:

1. The withdrawal, if any, of the additional protections and signaling that indicates the boundaries of the work zone.

2. The removal, if any, of the grounding and short circuit.

3. Unblocking and/or removing the signage from the cutting devices.

4. The closing of the circuits to replenish the voltage.

From the moment that one of the measures initially taken to perform the work without tension is removed under security conditions, the part of the affected installation will be considered in tension.

B. Special provisions

The particular provisions set out below for certain types of work shall be considered as complementary to those set out in Part A of this Annex, except in cases where they are amended. explicitly.

B. 1 Fuse reposition.

In the particular case of the replacement of fuses in the facilities referred to in the first subparagraph of paragraph 4 of Part A. 1 of this Annex:

1. No grounding and short circuit shall be required when disconnection devices on both sides of the fuse are in the view of the worker, the cut is visible or the device provides security guarantees. equivalent, and there is no possibility of an unsound closure.

2. ° When the fuses are directly connected to the primary of a transformer, it shall be sufficient for the grounding and short-circuit of the high voltage side, between the fuses and the transformer.

B. 2 Work on overhead lines and high voltage conductors.

1. In the works on bare lines and naked high voltage conductors, the ground and short circuit are to be placed on both sides of the working area, and on each of the drivers entering this zone; at least one of the equipment or grounding devices and in short circuit should be visible from the work area. These rules have the following exceptions:

1. For specific jobs where there is no cutting of drivers during work, it is permissible to install a single grounding and short circuit equipment in the work area.

2. When it is not possible to see, from the limits of the work area, the equipment or devices from grounding and in short circuit, a local grounding equipment, or an additional device of signaling, or any other equivalent identification.

When the work is performed on a single driver of a high voltage overhead line, short circuit is not required in the work area, provided the following conditions are met:

a) At the points of the disconnect, all drivers are grounded and in short circuit according to the above.

(b) The driver on which the work is carried out and all the conductive elements-except for the other phases-within the working area are electrically linked to each other and placed on the ground by a team or appropriate device.

(c) The grounding conductor, the work area and the worker are outside the danger zone determined by the other drivers of the same electrical installation.

2. In the work on isolated overhead lines, cables or other insulated, high voltage, ground and short-circuit conductors shall be placed on the bare elements of the opening points of the installation or as close as possible to those points, on each side of the work zone.

B. 3 Work in installations with capacitors that allow for a hazardous accumulation of energy.

To leave without voltage an electrical installation with capacitors whose capacity and voltage allow a hazardous accumulation of electrical energy the following process will be followed:

(a) The separation of the potential sources of tension by disconnection, either with visible cut or reliable stress-absence witnesses, shall be carried out and ensured.

(b) A discharge circuit shall be applied to the terminals of the capacitors, which may be the grounding and short circuit circuit referred to in the following paragraph when it includes a ground section, and wait for the time required for the download.

c) The grounding and short circuit of the capacitors shall be carried out. When there are semi-conductor elements, fuses or automatic switches between the latter and the cutting means, the operation shall be carried out on the terminals of the capacitors.

B. 4 Jobs in transformers and in high voltage machines.

1. To work without tension in a power or voltage transformer all circuits of the primary and all circuits of the secondary shall be left without tension. If the characteristics of the cutting means permit, the separation of the lower voltage circuits shall be carried out first. For the replacement of the voltage shall be inversely carried out.

To work without tension in a transformer of intensity, or on the circuits it feeds, the primary will be left without tension. The opening of the circuits connected to the secondary is prohibited when the primary is in tension, unless it is necessary for some cause, in which case the bornes of the secondary shall be short-circuited.

2. Before handling inside an electric motor or generator it shall be checked:

a) That the machine is completely stopped.

b) That feeds are disconnected.

c) That the bornes are in short circuit and land.

d) That fire protection is blocked.

e) That the atmosphere is not harmful, toxic or flammable.

ANNEX III

Jobs in Tension

A. General provisions

1. The stress work must be carried out by qualified workers, following a previously studied procedure and, where its complexity or novelty requires it, tested without tension, which meets the requirements set out below. Work in places where communication is difficult, by its orography, confinement or other circumstances, must be carried out by at least two workers with first aid training.

2. The working method used and the equipment and materials used must ensure the protection of the worker against the electrical risk, ensuring in particular that the worker is not able to contact any other element accidentally. potential other than yours.

Among the equipment and materials cited are:

a) Insulating accessories (screens, covers, pods, etc.) for the coating of active parts or masses.

b) The insulative or insulated useful (tools, tweezers, test tips, etc.).

c) Insulating pertigas.

d) Insulating or isolated devices (sidewalks, carpets, work platforms, etc.).

e) Personal protective equipment against electrical hazards (gloves, goggles, helmets, etc.).

3. For the purposes of the preceding paragraph, equipment and materials for the performance of stress work shall be chosen from among those designed for this purpose, taking into account the characteristics of the work and of the workers and, The service voltage, and shall be used, maintained and reviewed in accordance with the instructions of the manufacturer.

In any case, equipment and materials for the performance of stress-related work shall comply with the specific regulations applicable to them.

4. Workers must have a sound and stable support, which enables them to have their hands free, and to provide them with lighting to enable them to carry out their work under appropriate conditions of visibility. Workers shall not bear conductive objects, such as wristbands, watches, chains or metal zip closures that may be accidentally contacted with elements in tension.

5. The work area shall be appropriately marked and/or demarcated, provided that there is a possibility for other workers or persons outside the area to enter the area and to access elements in tension.

6. Preventive measures for the conduct of outdoor work must take into account the possible unfavourable environmental conditions, so that the worker is protected at all times; the work will be prohibited or suspended in case storm, heavy rain or wind, snow, or any other unfavorable environmental condition that makes it difficult to visibility, or the manipulation of tools. Work on indoor installations directly connected to electrical overhead lines shall be interrupted in the event of a storm.

B. Additional provisions for high voltage jobs

1. The work shall be carried out under the direction and supervision of a head of work, who shall be the qualified worker who assumes direct responsibility for the work; if the extent of the work area does not permit adequate surveillance, he shall require the help of another skilled worker.

The head of work will communicate with the person responsible for the installation where the work is done, in order to adapt the conditions of the installation to the requirements of the work.

2. Qualified workers must be authorised in writing by the employer to carry out the type of work to be carried out, after verifying their ability to do so correctly, in accordance with the procedure laid down, which must be be defined in writing and include the sequence of the operations to be performed, indicating in each case:

a) The security measures to be taken.

b) The material and means of protection to be used and, if necessary, the instructions for use and for the verification of their good condition.

c) The circumstances that might require the interruption of the job.

3. The authorisation will have to be renewed, following a further verification of the worker's ability to properly follow the established working procedure, when the worker has changed significantly, or when the worker has stopped performing the type of work in question for a period of more than one year.

The authorisation must be withdrawn when the worker is observed to be in breach of the safety rules, or where health surveillance shows that the state or the temporary situation of the worker is not in line with the psycho-physical requirements required by the type of work to be developed.

C. Special provisions

The particular provisions set out below for certain types of work shall be considered as complementary to those set out in the preceding parts of this Annex, except in cases where they are amended. explicitly.

C. 1 Fuse reposition.

(a) In low-voltage installations, the replacement of fuses shall not be required by a qualified worker, which may be carried out by an authorised worker, when the manoeuvring of the fuse-holder is carried out by the disconnection from the fuse and the material of the fuse provides complete protection against direct contacts and the effects of a possible electric arc.

(b) In high voltage installations, it is not necessary to comply with the provisions of Part B of this Annex when the manoeuvring of the fuse device is carried out at a distance, using pertigas to ensure an adequate level of isolation and protective measures are taken against the effects of a possible short circuit or direct electrical contact.

ANNEX IV

Manoeuvres, measurements, tests and verifications

A. General provisions.

1. Local manoeuvres and measurements, tests and checks may only be carried out by authorised workers. In the case of measurements, tests and verifications in high voltage installations, they shall be qualified workers, and may be assisted by authorised workers, under their supervision and control.

2. The working method used and the work equipment and materials used shall protect the worker from the risk of electrical contact, electric arc, explosion or material projection.

Among the protection equipment and materials cited are:

a) Insulating accessories (screens, covers, pods, etc.) for the coating of active parts or masses.

b) The insulative or insulated useful (tools, tweezers, test tips, etc.).

c) Insulating pertigas.

d) Insulating or isolated devices (sidewalks, carpets, work platforms, etc.).

e) Personal protective equipment (screens, gloves, goggles, helmets, etc.).

3. For the purposes of the preceding paragraph, the equipment and the work or protective equipment used for the performance of such operations shall be chosen from among those designed for that purpose, taking into account the characteristics of the work and, in particular, the service voltage, and shall be used, maintained and reviewed in accordance with the instructions of the manufacturer.

In any case, equipment and materials for the performance of these operations shall be in accordance with the specific rules applicable to them.

4. Workers must have strong and stable support, allowing them to have their hands free, and to provide them with lighting that enables them to perform their work under appropriate conditions of visibility.

5. The work area shall be appropriately marked and/or demarcated, provided that there is a possibility for other workers or persons outside the area to enter the area and to access elements in tension.

6. Preventive measures for the conduct of such outdoor operations shall take into account any adverse environmental conditions, so that the worker is protected at all times.

B. Special provisions

The particular provisions set out below for certain types of intervention shall be considered as complementary to those set out in the preceding part of this Annex, except in cases where they are amended. explicitly.

1. In local manoeuvres with switches or dryers:

1. The working method used should provide for both the reasonably possible defects of the apparatus, and the possibility of mismanoeuvres (opening of load dryers, or closing of sectionators in the short circuit).

2. For the protection against the risk of electric arc, explosion or projection of materials, the use of protective equipment will not be obligatory when the place from where the maneuver is performed is totally protected in the face of such risks by removal or interposition of obstacles.

2. For measurements, tests and verifications:

1. In cases where it is necessary to remove any grounding device placed in the operations performed to leave the installation without tension, the necessary precautions shall be taken to avoid refeeding. This is not the case.

2. When it is necessary to use a source of external tension, precautions will be taken to ensure that:

a) The installation cannot be repowered by another source of tension other than the intended one.

b) The cut-off points have sufficient insulation to resist the simultaneous application of the test voltage on one side and the service voltage on the other.

c) Prevention measures taken against electrical risk, short circuit or electric arc shall be adapted to the voltage level used.

ANNEX V

Jobs in proximity

A. General provisions

In all work in the vicinity of elements in tension, the worker must remain outside the danger zone and the furthest away from it that the work permits.

A. 1 Preparing the job.

1. Before starting work in the vicinity of stress elements, an authorised worker, in the case of low-voltage work, or a qualified worker, in the case of high voltage work, shall determine the feasibility of the work, taking into account the provisions of the preceding paragraph and the other provisions of this Annex are included.

2. If the work is feasible, the necessary safety measures must be taken to minimise the following:

a) The number of elements in tension.

(b) The danger zones of the elements which remain in tension, by the placement of screens, barriers, envelopes or insulators whose characteristics (mechanical and electrical) and form of installation ensure their protective efficacy.

3. If, despite the measures taken, there are still elements in tension whose danger zones are accessible, it should be:

(a) demarcate the area of work in respect of the danger zones; the delimitation shall be effective with respect to each danger zone and shall be made with the appropriate material.

(b) Inform workers directly or indirectly involved, of the existing risks, the situation of the elements under stress, the limits of the working area and how many precautions and safety measures they need to take to not to encroach on the danger zone, in addition to the need for them, in turn, to report on any circumstances showing the inadequacy of the measures taken.

4. Without prejudice to the provisions of the foregoing paragraphs, in undertakings whose usual activities involve the carrying out of work in the vicinity of elements in tension, particularly if they take place outside the working centre, the employer must ensure that workers have knowledge that enables them to identify electrical installations, identify potential risks and work accordingly.

A. 2 Realization of the job.

1. Where the measures taken pursuant to paragraph A. 1.2 are not sufficient to protect workers from the electrical risk, the work shall be carried out after the delimitation and information measures have been taken. referred to in paragraph A. 1.3, by authorised workers, or under the supervision of one of them.

2. In the performance of their surveillance function, authorised workers shall ensure compliance with security measures and control in particular the movement of workers and objects in the work area, taking into account their characteristics, their possible accidental displacements and any other circumstances that could alter the conditions under which the planning of the work has been based. Surveillance shall not be required when the work is carried out outside the proximity zone or in low voltage facilities.

B. Special provisions

B. 1 Access to service enclosures and electric material wrappers.

1. Access to independent enclosures for electrical service or to the performance of electrical tests or tests (power stations, substations, processing centres, control rooms or laboratories) shall be restricted to workers. authorised, or to staff, under the continued monitoring of these, which has been previously informed of the risks and precautions to be taken.

The doors of these enclosures must be signposted indicating the entry ban on unauthorized personnel. Where there are no service personnel in the enclosure, the doors shall be closed in such a way as to prevent unauthorised personnel from entering.

2. The opening of cells, closets and other electrical equipment shall be restricted to authorised workers

3. Access to the premises and the opening of the envelopes by authorized workers may be carried out only if the employer for whom they work and the owner of the installation are not the same person, with the knowledge and permission of the latter.

B. 2 Works and other activities in which movements or movements of equipment or materials occur in the vicinity of overhead lines, underground or other electrical installations.

For the prevention of electrical risk in activities in which movements or movements of equipment or materials occur in the vicinity of overhead lines, underground or other electrical installations (as is often the case, for example, in building, public works or certain agricultural or forestry work), the following shall be done:

1. Before the start of the activity, the possible overhead lines, underground or other electrical installations in the work area, or in the vicinity, shall be identified.

2. If, in any of the phases of the activity, there is a risk that an underground line or some other element in protected tension can be reached, with possible rupture of its isolation, the necessary preventive measures must be taken to avoid such circumstance.

3. If, in any of the phases of the activity, the presence of airlines or of any other element in unprotected tension, it may pose an electrical risk to the workers and, for the reasons set out in Article 4.4 of this Royal Decree, such lines or elements cannot be diverted or left without tension, the provisions of Part A of this Annex shall apply.

For the purposes of determining the areas of danger and proximity, and of the consequent delimitation of the work area and routes of movement, particular account should be taken of:

a) The elements in tension without protecting them to be closer in each case or circumstance.

b) Foreseeable movements or movements (transport, elevation and any other type of movement) of equipment or materials.

ANNEX VI

Jobs in sites at risk of fire or explosion. Static electricity

The electrical installation and equipment shall be in conformity with the particular requirements for premises of premises with fire or explosion risk as indicated in the electrotechnical regulation.

A. Work on sites at risk of fire or explosion.

1. Work on electrical installations at sites at risk of fire or explosion shall be carried out in accordance with a procedure which minimises these risks; this shall be limited and shall, as far as possible, monitor the presence of substances. Flammable in the working area and the occurrence of ignition bulbs shall be avoided, in particular in the case where there is, or may be, an explosive atmosphere. In such a case the performance of works or operations (change of lamps, fuses, etc.) shall be prohibited, except in the case of installations and equipment designed to operate under these conditions, which comply with the specific rules applicable.

2. Before the work is carried out, the availability, suitability for the foreseeable type of fire and good state of the media and equipment of extinction will be verified. If a fire occurs, the parts of the installation which may be affected shall be disconnected unless it is necessary to leave them in tension to act against the fire, or to cause the disconnection to cause potentially more serious hazards than those which can be derived from the fire itself.

3. The work shall be carried out by authorised workers; when they are to be carried out in an explosive atmosphere, they shall be carried out by qualified workers and must follow a procedure previously studied.

B. Static electricity.

1. In any place or process where an accumulation of electrostatic charges may occur, the necessary preventive measures must be taken to avoid dangerous discharges and, in particular, the production of sparks at sites at risk of fire or explosion. To this end, special attention must be paid to:

a) Processes where continuous friction of insulating or isolated materials occurs.

(b) Processes in which a vaporisation or spraying occurs and the storage, transport or transfer of liquids or materials in the form of dust, in particular, in the case of flammable substances.

2. In order to avoid the accumulation of electrostatic charges, one of the following measures, or a combination thereof, shall be taken according to the specific circumstances and circumstances of each case:

a) Removing or reducing friction processes.

b) Avoid, as far as possible, processes that produce spray, spray, or free fall.

c) Use of antistatic materials (pulleys, moquettes, footwear, etc.) or increase in conductivity (by increasing relative humidity, use of additives or any other means).

(d) Connection to land, and to each other where necessary, of materials capable of acquiring load, in particular, of insulated conductors or metallic elements.

e) Use of specific devices for the removal of electrostatic charges. In this case the installation must not expose the workers to dangerous radiation.

f) Any other measure for a particular process that ensures the non-accumulation of electrostatic charges.