Practice Tests
Test your knowledge with 90 free NEC exam questions. Choose a topic below to start practising with instant feedback and detailed explanations.
Chapter 1
Definitions
Essential definitions used throughout the NEC, including terms for circuits, equipment, grounding, and wiring methods that form the foundation of electrical code interpretation.
Chapter 1
General Requirements
Fundamental requirements for electrical installations including examination of equipment, installation and use, spaces about equipment, and electrical connections.
Chapter 2
Wiring and Protection
Requirements for branch circuits, feeders, services, overcurrent protection, grounding, and surge protection to ensure safe electrical distribution.
Chapter 3
Wiring Methods and Materials
Covers conductor types, cable assemblies, raceways, boxes, conduit bodies, and fittings used in electrical installations.
Chapter 4
Equipment for General Use
Installation requirements for switches, receptacles, lighting, appliances, motors, transformers, and other common electrical equipment.
Chapter 5
Special Occupancies
Electrical requirements for hazardous locations, healthcare facilities, assembly occupancies, theaters, carnivals, marinas, and agricultural buildings.
Chapter 6
Special Equipment
Requirements for electric signs, manufactured buildings, swimming pools, solar PV systems, generators, fire pumps, elevators, and electric vehicle charging.
Chapter 7
Special Conditions
Covers emergency systems, legally required standby systems, optional standby systems, interconnected electric power production sources, and energy storage systems.
Chapter 8
Communications Systems
Requirements for communications circuits, radio and television equipment, CATV systems, network-powered broadband, and premises-powered broadband.
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