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10.5.2 The installation status should be kept energized by the commitment to restoring power, should be re-energized in the same sequence of the following:

a) removal of tools, fixtures and equipment; b) withdrawal of the controlled area of all workers not involved in the process of restoring power; c) removing the temporary grounding of Electrical safety and additional protections; d) removal of the signs of being unable to re-energizing; e) unlocking, if any, and reconnection of isolation devices.

10.5.3 The measures contained in paragraphs set out in 10.5.1 and 10.5.2 items can be changed, replaced, extended or eliminated, depending on the peculiarities of each situation, by a legally qualified technical justification and approved by formalized previously provided to maintain the same level of security originally envisaged.

10.5.4 The services to be performed on electrical installations off, but with the possibility of energizing, by any means or reason, must respond to establishing the provisions of item 10.6.


10.6.1 Interventions in electrical installations with voltage less than 50 Volts AC or exceeding 120 volts direct current can only be performed by workers who attend to what establishes the item 10.8 of the Standard. The workers that the preceding item should receive safety training for work with live electrical installations, with minimum curriculum, workload and other provisions set forth in Annex I of NR. The elementary operations such as connect and disconnect electrical circuits carried out at low voltage, with materials and electrical equipment in perfect condition, suitable for operation, can be performed by anyone not warned.

10.6.2 The jobs that require entry into the controlled area must be conducted through procedures respecting the specific distances in Annex I.

10.6.3 The services installations energized, or in its vicinity should be withdrawn immediately in imminent occurrence that may put workers in danger.

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10.6.4 Where innovations are implemented and for entry into operation of new installations or electrical appliances should be previously developed risk assessments, developed with de-energized circuits, and their working procedures.

10.6.5 The person responsible for implementation of the service should suspend activities when checking status or condition unanticipated risk, the elimination or neutralization is not possible immediately.


10.7.1 Workers involved in electrical installations energized with high voltage, exercising its activities within the limits established as risk-controlled areas and, according to Annex I, must respond to provided in Section 10.8 of this NR.

10.7.2 The employees mentioned in item 10.7.1 should receive safety training, in particular Safety in Electric Power System (EPS) and its vicinity, with a minimum curriculum, workload and other provisions set forth in Annex I of NR.

10.7.3 The services on live electrical installations in HV, as well as those executed in the Electric System Power – (in portuguese – SEP), can not be achieved individually.

10.7.4 All work on live electrical installations in HV, as well as those that interact with the SEP, can only be accomplished by order of service for specific time and place, signed by more than responsible for the area.

10.7.5 Before starting work on energized circuits in HV, the supervisor and the team responsible for performance of service, shall conduct a preliminary evaluation, study and plan the activities and actions to be developed to meet the basic technical principles and best technical security applicable to the electricity service.

10.7.6 The services on live electrical installations in HV can only be achieved when there specific procedures, detailed and signed by licensed professional.

10.7.7 The intervention on live electrical installations in HV within the limits established as a zone of risk, according to

Annex I of the NR, can only be achieved through the deactivation, also known as blockade, the sets and automatic reclosing devices on the circuit, system or equipment. The equipment and devices shall be marked off with identification of the condition deactivation as specific standard working procedure.

10.7.8 The equipment, tools and devices equipped with insulators or insulating materials, for the work in high voltage, must be subjected to electrical tests or laboratory tests Periodicals obeying the manufacturer's specifications, company procedures and in the absence of these annually.

10.7.9 Each employee on live electrical installations in HV, as well as those involved in activities the SEP must have equipment that allows communication with other team members or with the operation center during the delivery of service.


10.8.1 It is considered a skilled worker who demonstrate completion of specific courses in the electrical recognized by the official educational system. 10.8.2 It is considered a legally qualified employee previously qualified and registered at competent counsel in class. 10.8.3 It is considered skilled worker who meets the following conditions simultaneously:

a) receive training under the guidance and responsibility of a qualified professional and authoritative, and b) work under the supervision of a qualified professional and approved. The qualification is only valid for the company that trained and conditions established by authorized and qualified professional responsible for training.

10.8.4 shall be considered authorized or qualified skilled workers and skilled professionals, formal agreement with the company.

10.8.5 The Company shall establish identification system enabling any time know the extent the authorization for each worker, according to item 10.8.4.

10.8.6 Employees authorized to work in electrical installations should be recorded in this condition registration system employee.

10.8.7 Employees authorized to intervene in electrical installations should undergo health check consistent with the activities to be developed, carried out in accordance with NR 7 and registered in your medical records.

10.8.8 Employees authorized to intervene in electrical installations must have specific training on risks resulting from the use of electricity and the main measures for preventing accidents electrical installations in accordance with the rovisions of Annex I of NR. The Company will grant permission in the form of NR workers trained or qualified to skilled professionals who have participated in evaluation and satisfactory utilization of the courses listed in Annex I of NR. There must be a refresher training every two years and whenever any of the above situations following:

Page 5 of 12 a) return of function or change of company; b) return to work or removal of inactivity for a period exceeding three months; c) significant changes in the electrical installation or exchange of methods, processes and work organization. The workload of the training syllabus and recycling used in the treatment of paragraphs "a", "b" and "c" of paragraph must meet the needs of the situation that motivated him. Work in hazardous areas should be preceded by specific training according to risk involved.

10.8.9 Employees with activities not related to the electrical installations developed in the free zone and in vicinity of the controlled area, as defined by this NR are to be formally educated with knowledge to identify and assess their potential risks and take reasonable precautions.


10.9.1 Areas where there are installations or electrical equipment shall be provided with fire protection and explosion, as does the NR 23 - Fire Protection.

10.9.2 The materials, parts, appliances, equipment and systems for use in electrical installations environments with potentially explosive atmospheres must be assessed for compliance under Brazilian Certification System.

10.9.3 The processes and equipment which may generate or accumulate static electricity must have specific protection devices and electrical discharge.

10.9.4 In the electrical installations in hazardous areas or subjected to extreme risk of fire or explosions, should be adopted protective devices such as alarm and automatic sectioning to prevent surges, faults, fault isolation, heating or other abnormal conditions of operation.

10.9.5 The services on electrical installations in hazardous areas may only be achieved by ermission to work with formal release, as established in item 10.5 or suppression agent risk that determines the classification of the area.


10.10.1 In installations and electrical work must adopt adequate safety signage, for the warning and identification, according to the provisions of NR-26 - Signaling Security in order to attend, among others, the following situations:

a) identification of electrical circuits; b) lock-ups and blocks devices and switching systems and controls; c) restrictions and impediments to access; d) delimitation of areas; e) signs of circulation areas, public roads, vehicles and cargo handling; f) signaling prevented from energizing; g) identification of equipment or circuit prevented.


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