Technical Name: NR 10 BASIC TRAINING COURSE SAFETY IN ELECTRICITY INSTALLATIONS AND SERVICES
Reference: 167222
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What is the objective of the NR 10 Basic Course?
The NR 10 Basic Course aims to train workers who operate directly or indirectly with electricity, promoting a comprehensive understanding of electrical risks, control measures, and mandatory procedures established by the regulation. Thus, the training focuses on accident prevention, legal compliance, and reducing human errors in the workplace.
Therefore, this course is mandatory for any employee who comes into contact with electrical installations or services, even indirectly. It provides a solid technical foundation on de-energization, signage, risk analysis, use of PPE and collective protection equipment, while also emphasizing the importance of legal documentation in the safe management of electrical energy.
What are the technical criteria for authorizing a worker to perform electrical tasks?
Authorizing a worker to perform electrical work depends on three regulatory pillars required by NR 10: specific training, medical fitness, and formal documentation. Therefore, the company must issue a written authorization and maintain records of the technical training, including its program content, duration, and evaluation.
Mandatory technical criteria:
Completion of Basic NR 10 Training (or Supplementary SEP, if applicable);
Updated occupational health certificate;
Internal formal authorization document, signed by the employer;
Record of the worker’s qualification and the ART (Technical Responsibility Annotation) issued by a legally qualified professional.
What are the most common mistakes in the application of NR 10?
The most frequent mistake is treating NR 10 as just a course instead of a documented and continuous electrical safety management system. As a result, many companies overlook critical elements such as issuing ARTs, updating the electrical dossier (PIE), or formally releasing energized services.
Other recurring mistakes include:
Lack of periodic inspections in electrical systems;
Failure to implement lockout and proper signage during maintenance;
Use of inadequate or expired PPE;
Performing work without risk analysis or formal work release;
Failure to carry out mandatory refresher training every two years.
NR 10 Basic Course: Does NR 10 also apply to photovoltaic systems and solar panels?
Yes. NR 10 fully applies to photovoltaic systems, as they involve the generation, conversion, and distribution of electrical energy. The entire electrical infrastructure associated with solar panels—including inverters, circuit breakers, and cabling requires adherence to the control measures established by the standard.
In addition, photovoltaic installations often operate with high DC voltages, which increase complexity and risk. Compliance with NR 10 is mandatory for both residential and industrial projects. It is also recommended to complement NR 10 with ABNT NBR 16690, which specifically covers photovoltaic electrical installations.
Does NR 10 require periodic inspections of electrical installations? How often?
Yes. NR 10 mandates that all electrical installations be periodically inspected, tested, and documented. The exact frequency depends on system criticality, the operational environment, and the technical assessment outlined in the maintenance plan.
Inspection frequency guidelines:
Critical installations: every 6 to 12 months;
Aggressive or humid environments: semiannually;
Protective equipment: as per manufacturer’s recommendations or usage intensity;
Technical reports: updated after modifications or when the PIE expires (usually every 2 years).
What is the difference between the hazard zone and the controlled zone in NR 10?
According to NR 10, the hazard zone is the area where there is a real possibility of contact with energized parts, defined as voltages above 50V AC or 120V DC. The controlled zone, on the other hand, is a restricted access area surrounding the electrical installation, requiring proper authorization, signage, and PPE usage.
Technical summary:
| Zone | Technical Definition | Requirements |
|---|---|---|
| Hazard Zone | Area with the potential for electric shock | Lockout, PPE, authorized and trained personnel |
| Controlled Zone | Safety perimeter around the installation | Signage, restricted access, formal authorization |
NR 10 Basic Course: When is the Electrical Installation Dossier (PIE) legally required?
The PIE is mandatory for all companies with low or medium voltage electrical installations, as defined in item 10.2.4 of NR 10. It must be available on-site and updated whenever modifications, inspections, or renovations occur.
At a minimum, the PIE must include:
The single-line diagram of the electrical installation;
Technical reports and inspection certificates;
Specifications of protective equipment;
Operational procedures and safety instructions;
Records of worker training and formal authorizations.
Without the PIE, the company cannot demonstrate technical compliance, exposing itself to legal and operational penalties.
How do the technical documents required by NR 10 support the company’s legal defense?
The technical documentation required by NR 10 serves as formal evidence of the company’s diligence in managing electrical risks. In the event of an accident, inspection, or labor lawsuit, these documents prove that the organization has implemented the required control measures and properly trained its workers.
Documents with high legal value include:
The ART (Technical Responsibility Annotation) issued by the certified professional in charge of the electrical system;
An up-to-date PIE with inspection and maintenance records;
Attendance sheets for trainings and formal worker authorizations;
Signed operational procedures and safety instructions.
Therefore, without these records, the company not only weakens its legal position but also becomes vulnerable to liability for technical negligence.
Click the Link: Criteria for Certificate Issuance According to Standards
Certificate of Completion
