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.
 Small generators can’t handle the load


I recently was asked to review a series of emails from a colleague about equipment requirements for ready access or, as defined in Article 100 and used within text in the National Electrical Code (NEC), as “readily accessible.” This phrase is used to describe the location of circuit breakers, for ex

What does the National Electrical Code (NEC) require when installing isolated/insulated grounding-type receptacles and auxiliary grounding electrodes?

Most of Article 240 in the National Electrical Code (NEC) provides general requirements for overcurrent protection and overcurrent protective devices not more than 1,000 volts (V), nominal. As a general rule, the overcurrent device rating shall not exceed the ampacity of a conductor.

More on Codes & Standards

 
Field Marking of Arc Flash Hazards

Whenever energized electrical equipment is being examined, serviced, maintained or adjusted in any way, there is always the potential for an electrical explosion to occur, resulting in injury to the electrical worker and damage to the equipment.

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Generators, Fire Pumps, General Wiring, and More

CODE CITATIONS Article 100—Definitions Article 225—Outside Branch Circuits and Feeders Article 230—Services Article 250—Grounding Article 310—Conductors for General Wiring Article 320—Armored Cable: Type AC Article 430—Motors, Motor Circuits, and Controllers Article 445—Generators Article 518—Places

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Revisions Address Grounding Separately Derived Systems
by Staff |

There are a number of substantial changes in Article 250 of the 2002 National Electrical Code (NEC) covering grounding and bonding.

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Getting Well-grounded in Grounding Systems
by Staff |

We are often left in the air about exact meanings of grounding problems. This article simplifies the differences between the grounded and grounding conductor. The two aspects of grounding are system grounding and equipment grounding. This article concerns the former.

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Getting Well-grounded in Grounding Systems
by Staff |

We are often left in the air about exact meanings of grounding problems. This article simplifies the differences between the grounded and grounding conductor. The two aspects of grounding are system grounding and equipment grounding. This article concerns the former.

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Article 210 - Branch Circuits
by Staff |

For tables, please see refer to Electrical Contractor magazine. 210.8(A) Dwelling Units

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Power Supply for a Fire Pump, Stranded Conductors on Receptacles, Kitchen Light Switches, and More
by Staff |

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 210—Branch Circuits Article 230—Services Article 250—Grounding Article 408—Switchboards and Panelboards Article 430—Motors, Motor Circuits, and Controllers Article 695—Fire Pumps

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