Course on Basics in Safety in Electrical Installations and Services

The objective of the course is to provide basic knowledge on notions of electricity and electrical hazards, measures to prevent and protect against shocks and burns, emergency procedures and first aid, in addition to addressing the applicable standards and regulations, such as NR-10 itself and other relevant ones. Aiming to make workers aware of the importance of electrical safety, enabling them to identify, avoid and protect themselves against hazards encountered in electrically hazardous environments, even if they do not directly perform electrical tasks.

What is De-energized Installation?

De-energized installation is a condition in which an electrical installation is completely disconnected from any electrical power source, whether external or internal. Some important features of a de-energized installation:

Absence of electrical voltage: All active parts (live conductors) of the electrical installation must be completely disconnected from any power source, so that no voltage is present.

Shutdown of all circuits: All electrical circuits must be turned off, in order to completely stop the flow of electrical current.

Grounding: After disconnecting the power supply, the metal parts of the installation must be grounded in order to avoid dangerous voltages.

Lockout and signalling: The de-energized installation must be locked and signalled, so as to prevent anyone from accidentally restarting it while work is being carried out.

This de-energized installation condition is essential to allow work to be carried out safely, as it eliminates the risk of electric shocks, burns, and other accidents arising from contact with live parts. Only after confirmation has been made that the facility is completely de-energized and grounded can authorized workers begin maintenance, repairs, or modifications, minimizing electrical hazards.

What is the importance of electrical testing?

Electrical testing is critical to safety in installations and services with electricity, as it performs several important functions:

Verification of absence of voltage: Before starting the work, it is essential to carry out tests to prove that the installation is effectively de-energized. This check prevents accidents due to contact with live parts.

Grounding Integrity Assessment: Grounding continuity and resistance testing are crucial to ensure that the grounding system is functioning properly. Proper grounding is essential for the safety of workers.

Identification of insulation faults: Electrical insulation tests allow you to detect problems in the insulation of equipment and facilities. This prevents short circuits and electric shocks from occurring.

Current leakage detection: Tests with leakage current (DR) devices verify that these protective equipment are working properly. This check is important to avoid electric shock.

Electrical power quality analysis: Testing of electrical parameters, such as voltage, current, frequency, and distortions, allows you to identify problems in the electrical supply. This helps prevent damage to equipment and facilities.

Certification of conformity: The tests certify that the electrical installation complies with the applicable technical standards and regulations.

SCOPE:

Introduction to Electrical Safety: Introduces the basic concepts about the importance of safety in installations and services with electricity;

Basic Concepts of Electricity: Covers fundamental notions about electricity, such as voltage, current, resistance, and power, so that workers understand the risks involved;

Risks in Electrical Installations: Details the main risks, such as electric shock, burns, fires, explosions and falls, and their mechanisms of occurrence;

Physiological Effects of Electricity: Explains how electricity affects the human body, causing damage such as cardiac arrest, muscle contraction, and injury;

Factors influencing Electric Shock: Identifies factors that can aggravate the effects of shock, such as duration of exposure, current intensity, and humidity;

First Aid and Emergency Procedures: Teaches how to proceed in case of electrical accidents, including resuscitation techniques, removal of victims, and activation of emergency services;

Electrical Grounding, Bonding and Sectioning: Explains the importance of these protection mechanisms for the safety of workers;

Isolation, Barriers, Blockages and Signaling: Presents the measures to control the electrical risk through the isolation of live parts, use of barriers and adequate signage;

Collective and Individual Protective Equipment: Details the types of EPC and PPE necessary for the protection of workers in environments with electrical risk;

Work Procedures and Documentation: Addresses the minimum safety requirements, inspections, verifications and the documentation necessary to carry out work on electrical installations;

Hazardous Areas: Explains what hazardous areas are, the types of explosive atmospheres, and the precautions required when working in these places;

Additional Risks: Addresses other hazards that may be present, such as working at heights, in confined spaces, in humid environments, or with adverse weather conditions.

Fire Protection: Deals with the basics of prevention, extinguishing methods and procedures to be adopted in case of fire;

Accidents of Electrical Origin: Analyzes the main direct and indirect causes of electrical accidents, with discussion of real cases;

Accident Statistics and Analysis: Presents statistical data on accidents involving electricity and discusses the importance of analyzing these events;

Related Regulatory Standards (NRs): Addresses the main Regulatory Standards of the Ministry of Labor and Employment that apply to safety in electrical installations and services;

Applicable Brazilian Technical Standards (NBRs): Explains the main technical standards of ABNT that establish electrical safety requirements;

Workers' Responsibilities: Clarifies the duties and responsibilities of workers in relation to safety in installations and services with electricity;

Qualification, Qualification and Authorization: Discusses the qualification, qualification, training and authorization requirements of workers to perform electrical tasks;

Relevant Legislation and Regulations: Presents an overview of the legislation and regulations applicable to electrical safety, in addition to NR-10;

Types of Grounding: Details the different grounding systems (TN, TT, and IT) and their characteristics, emphasizing the importance of proper grounding;

Leakage Current Devices: Explains the operation and application of residual current (DR) devices for protection against electric shocks;

Extra Low Voltage: Addresses the use of extra low voltage as a safety measure, presenting its benefits and limitations;

Electrical Insulation: Discusses the different levels of insulation, such as basic insulation, double insulation, and reinforced insulation, and their relevance to safety;

Putting Out of Reach: Explains the importance of keeping energized parts out of the reach of workers, using structures and barriers;

Electrical Separation: Addresses the separation of circuits as a protective measure, preventing the propagation of electrical faults;

Inspection and Preventive Maintenance: Highlights the importance of carrying out periodic inspections and preventive maintenance on electrical installations;

Risk and Hazard Analysis: Teaches techniques for identifying, evaluating, and controlling electrical hazards, such as fault tree analysis;

Release and Lockout Procedures: Explains the procedures for de-energizing, blocking, and releasing electrical installations to carry out work;

Ergonomics and Behavioral Aspects: Discusses the importance of ergonomic factors and safe behavior of workers for the prevention of accidents.

The pedagogical team has the important task of ensuring that courses, training, technical reports, projects and other services are always up to date and in compliance with the relevant legislation. Therefore, it is natural that modifications may occur in the syllabus, including updates, additions or deletions. These changes always aim to improve and adapt the services offered to the needs of contractors and the market in general. 

It is important to note that the responsibility for complying with all relevant legislation lies with the contractor. The pedagogical team is always available to guide and clarify doubts about the updates made to the contracted services. We believe that transparency and dialogue are essential for us to maintain a relationship of trust and respect with our customers. We are committed to offering a quality service, always seeking excellence and satisfaction from our contractors.

TECHNICAL MANAGER

As one of those responsible for the didactic material of this course, I would like to express my satisfaction in being able to offer our students quality content that is relevant to their training.

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MULTIDISCIPLINARY COORDINATOR

Our team worked with dedication and commitment to develop a complete material, ranging from basic concepts to more advanced topics, always with a clear and objective approach.

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TRAINING INSTRUCTOR

We seek to include practical examples and exercises that stimulate learning and application of the knowledge acquired. We hope that this material will be useful and contribute to the success of our students in their academic and professional journey. We are available to answer questions and receive feedback to further improve our work.