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. 

Article 210 in the National Electrical Code (NEC) covers branch circuits, except when they supply only motor loads, which Article 430 covers. When sizing conductors for branch circuits, it is necessary to comply with the provisions in Article 210.

My last article provided a history and background on Article 400, dealing with flexible cords and cables. This month, I delve further into whether flexible cords and cables could or should be installed in concealed locations.

In a recent training presentation, a question came up about the new identification requirements for automatically controlled receptacles. Does the marking need to be on the receptacle face, or is a marking on the faceplate in compliance?

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.
 GFCI protection of dishwashers 
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More on Codes & Standards

 
What Is A 'Ufer' Ground?

At a recent seminar, one of the attendees asked, “What is a ‘Ufer’ ground?” This is a common question. A “Ufer” ground is slang for what the National Electrical Code (NEC) addresses as a concrete-encased grounding electrode.

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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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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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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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