Technical Name: TRAINING COURSE NR 10 – SEP (SAFETY IN ELECTRICAL POWER SYSTEMS (SEP) AND NEARBY AREAS) – TAUGHT IN ENGLISH
Reference: 10714
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NR 10 SEP Course in English
The NR 10 SEP Course in English trains professionals to work safely in electrical power systems and their surroundings, in accordance with NR 10. We deliver the training in technical English, ensuring practical mastery, precise communication, and compliance with international standards. In addition, the course covers live-line working techniques, risk analysis, proper use of PPE and collective protection equipment (CPE), installation release procedures, and prevention of complex electrical accidents.
The training is mandatory for those working with medium and high voltage, as specified in item 10.8 of the standard. Unlike the NR 10 SEP Course in English, which focuses on low voltage, the SEP course targets critical environments such as substations, transmission lines, and operation centers. The program includes issuance of ART (Technical Responsibility Annotation), ensuring full legal validity and technical credibility.

Working at height on an energized line requires specific SEP training, use of certified PPE, and application of live-line working techniques, as defined by NR 10.
When is the SEP training required according to NR 10?
According to NR 10, item 10.8.8, SEP training is mandatory for all workers who perform activities directly or indirectly in electrical installations of the Power System (SEP) and in its proximity, especially in the following scenarios:
Transmission and sub-transmission lines;
Medium and high-voltage substations;
Distribution networks;
Operation and maintenance centers with voltage above 1000V;
Environments involving live-line work, whether or not the power supply is interrupted.
Furthermore, workers must complete this training prior to starting their activities, and renew it every two years, or whenever there is a change in job role, return from leave, or modification in the electrical installations.
NR 10 SEP Course in English: Where are arc flash risks most critical in the SEP?
Arc flash risks are most critical in substations, medium and high-voltage panels, energized enclosures, and confined spaces. In these locations, the combination of stored energy, lack of insulation, and operational failures can trigger instantaneous thermal explosions, reaching temperatures above 19,000°C.
Within the SEP context, this risk increases due to the continuous energization of equipment, demanding specific techniques, high-performance PPE, and specialized training.
How is risk analysis applied within the SEP context?
In SEP environments, we apply risk analysis with technical accuracy and real-time context awareness. We identify hazards such as induction, energized components, and grounding failures, using tools like Preliminary Risk Analysis (PRA), risk matrices, and formal work permits.
We evaluate each variable based on technical data, exposure time, and actual site conditions.
What is the difference between the Basic NR 10 course and the SEP course?
The difference between the Basic NR 10 Course and the NR 10 – SEP Course lies in the technical complexity, level of risk involved, and required competencies.
Practical and Normative Comparison:
| Aspect | Basic NR 10 | NR 10 – SEP |
|---|---|---|
| Voltage range | Low voltage (LV) | Medium and high voltage (MV and HV) |
| Application | Residential, commercial, and basic industrial installations | Power systems, substations, transmission lines |
| Training duration | Minimum 40 hours | Additional 40 hours |
| Content | Electrical safety fundamentals, PPE/CPE, first aid | Live-line work techniques, induction risks, electromagnetic fields, energized lines, system release procedures |
| Mandatory | For any electrical activity | Mandatory for workers in SEP environments or nearby |
| Technical Responsibility (ART) | Not always required | Always required for critical operations with defined technical responsibility |
Conclusion: Basic NR 10 training is not sufficient to authorize a worker to operate in SEP environments. Failing to distinguish between these trainings transfers the technical and legal risk directly to the organization.

Qualified technician performs inspection on a medium-voltage panel according to NR 10 – SEP, applying standardized procedures and digital technical analysis.
NR 10 SEP Course in English: What is the importance of communication and signaling in the SEP?
Clear communication and visible signaling are essential lines of defense against fatal accidents in the SEP. In high-complexity operations, any miscommunication between teams can lead to unexpected energization, failure in system release, or simultaneous action on an energized circuit. The standard requires the use of tags, lockout devices, signs, radios, and formal verbal protocols to prevent human error.
In the SEP, communication failures are costly. A single misinterpreted command can interrupt a life, or an entire system.
Why is training in English a strategic advantage?
Because delivering training in technical English eliminates the risk of misinterpretation in critical environments, where each term holds operational and legal significance. In international projects, external audits, or bilingual partnerships, professionals trained in this language operate with confidence, read manuals, interpret schematics, and respond with precision.
Furthermore, offering the course in English with ART (Technical Responsibility Annotation) shows that the company values real competence, not just a translated certificate. It reflects positioning, compliance, and technical authority in a single move.
Click the Link: Criteria for Certificate Issuance According to Standards
Certificado de conclusão
NR 10 SEP Course in English
NR 10 SEP Course in English



