Protective Devices and Safety
A hands-on, video-led course on electrical hazards, safe working practices, and the protective devices — fuses, MCBs, overload relays, RCDs, earthing and surge protection — that keep people…
About This Course
This course teaches mechatronics technicians how electrical systems injure people and damage equipment, and how the family of protective devices is selected, installed, tested and maintained to prevent those failures. It moves from the human side of electrical safety — shock, burns, arc flash and safe isolation — into the operating principles of every common protective device: fuses (rewireable, cartridge and HRC), miniature and moulded-case circuit breakers, thermal overload relays, residual current devices (RCDs/ELCBs), earthing and equipotential bonding, and surge protection devices.
Practical workshops emphasise reading a distribution board, sizing and selecting protection, carrying out a safe lockout-tagout isolation, and verifying installations with an insulation tester and an earth-resistance tester. The content is grounded in IEC 60364 (low-voltage installations), IEC 60947 (low-voltage switchgear) and the Nigerian IEE Wiring Regulations, preparing students for entry-to-intermediate maintenance roles in manufacturing, oil and gas, and building services.
Course Content
Electrical Hazards and Safe Working Practices
Overcurrent Protection – Fuses, Circuit Breakers and Overloads
Earthing and Earth-Fault Protection
Surge Protection, Testing and Maintenance
Final Examination
Resources & Further Reading
Assignments
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