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

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Killer Heat

Last month's column discussed getting the most out your conductor ampacity, but the article did not really report the importance that wire terminations have on the final ampere rating of a conductor; many designers and electricians forget to consider the rating of the conductor versus the ability of

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Illuminated Fountains, Voltage Drop and More

Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC and NNS; Article 422—Appliances; Article 440—Air Conditioning and Refrigerating Equipment; Article 647—Sensitive Electronic Equipment; Article 680—Swimming Pools, Fountains and Simi

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Branch-Circuit, Feeder and Service Calculations, Part X

Maximum Loads: Last month’s Code in Focus concluded by covering loads for additions to existing installations; this month, the discussion continues with maximum loads as specified in 220.18.

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Twist-Lock Receptacles, Conductors and More

Included articles: Article 210—Branch Circuits; Article 230—Services; Article 250—Grounding and Bonding; Article 300—Wiring Methods; Article 310—Conductors for General Wiring; Article 314—Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures; Article 320—Armored

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Danger: High Voltage

Applying caution to electrical inspection: I could not do my job as an inspector if I couldn’t open doors and covers of energized equipment; when I came aboard, they gave me a screwdriver and a flashlight and turned me loose.

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Getting Started in Security

Bill yourself as code-compliant and follow the rules: Electronic security systems forecasts show continued industry growth; In fact, some studies indicate this $16 billion market will grow at an annual rate approaching 7 percent.

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Change of Plans

The price of copper has been increasing at an incredible rate over the past few years; the reasons for the increase is not an issue that will be discussed here, but the resulting price escalation affects the electrical industry since many of the electrical conductors used in construction are copper

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