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.
 Threadless couplings


Article 110 in the National Electrical Code (NEC) covers general requirements for the examination and approval, installation and use, access to and spaces about electrical conductors and equipment; enclosures intended for personnel entry; and tunnel installations (110.1).

My daughter, Trina Bogart, is an emergency department doctor. She recently emailed me a seemingly simple question. However, when I went to the 2014 National Electrical Code (NEC), I realized it was actually more complicated.

Service equipment must have an interrupting rating or short-circuit current (SCC) rating equal to or greater than the amount of available fault current supplied.

Electrical Contractor Magazine

More on Codes & Standards

 
Sizing Conductors, Part XXII

While selecting the correct size conductor is not difficult, more is involved than selecting a conductor based solely on the ampacity shown in Table 310.15(B)(16) in the National Electrical Code (NEC).

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Tapping In: Understanding Feeder Taps, Transformer Secondary Rules

Over the years, there always seemed to be a lack of understanding of the requirements for feeder taps as well as transformer primary and secondary overcurrent protection.

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What Constitutes Grouping?

A long-standing requirement in the National Electrical Code (NEC) is to provide a service disconnecting means for each building or structure served by electricity.

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Letter Codes, Feeder Conductor Size And More

If you have a problem related to the National Electrical Code (NEC), are experiencing difficulty in understanding a Code requirement, or are wondering why or if such a requirement exists, ask Charlie, and he will let the Code decide. Questions can be sent to codefaqs@earthlink.net.

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No Such Thing as A Silly Question?

A contractor installed a new fire alarm system in a college dormitory and asked the owner, “How thoroughly do you want me to test the fire alarm system?” I was there to witness the system’s pre-acceptance test before we called the authority having jurisdiction (AHJ) to arrange for the final acceptan

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The New Cycle Of Fire Protection

The beginning of 2013 is a good time to review what is happening with codes and standards that affect fire protection.

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Sizing Conductors, Part XXI

The rating of the overcurrent device must be considered when sizing a conductor.

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