NEC - National Electrical Code

The National Electrical Code (NEC), or NFPA 70 sets the foundation for electrical safety in residential, commercial, and industrial occupancies in the United States. It is part of the National Fire Codes series published by the National Fire Protection Association (NFPA), a private trade association.

NEC - National Electrical Code

The National Electrical Code (NEC), or NFPA 70 sets the foundation for electrical safety in residential, commercial, and industrial occupancies in the United States. It is part of the National Fire Codes series published by the National Fire Protection Association (NFPA), a private trade association.

Overview

The NEC provides:

  • Safety standards for electrical installation
  • Guidelines for residential, commercial, and industrial applications
  • Best practices for electrical systems and equipment
  • Requirements for grounding and bonding
  • Protection against electrical hazards
Code SectionTopicDescription
Article 110General RequirementsRequirements for electrical equipment and its approval, listing, labeling, and installation
Article 200Use and Identification of Grounded ConductorsRequirements for identification of grounded conductors
Article 210Branch CircuitsRequirements for branch circuits including rating and protection
Article 220Branch Circuit, Feeder, and Service CalculationsLoad calculation methods and requirements
Article 230ServicesRequirements for service entrance conductors and equipment
Article 240Overcurrent ProtectionRequirements for fuses and circuit breakers
Article 250Grounding and BondingGrounding requirements for safety
Article 300Wiring Methods and MaterialsGeneral requirements for all wiring methods
Article 400Flexible Cords and CablesRequirements for cord and cable usage
Article 430Motors, Motor Circuits, and ControllersMotor installation and protection requirements
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