Codes & Standards

 

Essential to the work of the electrical contractor is knowledge of the National Electrical Code, the National Electrical Installation Standards and additional standards and codes administered by the National Fire Protection Association, the Occupational Safety and Health Administration and others. Here is a list of all our articles on codes and standards listed chronologically by issue date. 

Jim Dollard has an extensive background in codes and standards. If you have a query about the National Electrical Code (NEC), Jim will help you solve it. Questions can be sent to codefaqs@gmail.com. Answers are based on the 2014 NEC.
 Pull-through angle connectors?


Some photovoltaic (PV) inverter manufacturers have designed and built transformer-less inverters to add to their existing line of transformer-type inverters for installation in the United States. Transformer-less inverters have been popular in Europe for quite some time.

Article 430 of the National Electrical Code (NEC) covers motors, motor branch-circuit and feeder conductors, motor branch-circuit and feeder protection, motor-overload protection, motor-control circuits, motor controllers, and motor-control centers.

During a recent National Electrical Code (NEC) training program, inquiries about ground-fault protection of equipment (GFPE) were raised.

More on Codes & Standards

 
Derating Parallel Conductors
by Staff |

Few topics considered in NECA’s on-line “Code Question of the Day” have kindled more fiery disagreement than that of this month’s article.

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Grounded Conductor ID, Outside Branch Circuits and Feeders, Services, Lighting Fixtures, and More
by Staff |

CODE CITATIONS Article 200—Use and Indentification of Grounded Conductors; Article 225—Outside Branch Circuits and Feeders; Article 230—Services; Article 250—Grounding; Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles;

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Splices and Conductor Fill in Enclosures and Wireways
by Staff |

The conductor fill requirements for a conduit or an outlet box are calculated in the field on a regular basis.

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NEC and OSHA Add to Confusion about GFCIs
by Staff |

Ground fault circuit interrupters (GFCIs) have been around since the early 60s, yet there is much confusion about their use and how they operate.

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Flexible Metal Conduit Length, Use of the Term 'Tap' Conductor for High-temp Wires
by Staff |

Since the 1940 National Electrical Code (NEC), there has been a requirement that recessed incandescent fixtures be connected by wire having insulation suitable for the temperature.

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Overcurrent Protection for Motor Installations, Part II
by Staff |

This month’s column will continue with questions and answers relating to overcurrent protection for conductors in motor and controller circuits and overload protection for motors.

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