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.
 Communications cable and 300.4(E)


Understanding the third article of the National Electrical Code (NEC), Article 110, Requirements for Electrical Installations, is essential to having a Code-compliant installation of the electrical system. 


In March, I attended a Central Arizona Chapter International Association of Electrical Inspectors (IAEI) meeting. A discussion ensued about the growing number of improperly installed and uncertified light-emitting diode (LED) retrofit lighting kits.

The National Electrical Code (NEC) contains the minimum requirements for a safe installation. One must do at least that much when installing electrical equipment and systems. This means understanding how to size electrical conductors of circuits, including the equipment grounding conductors (EGCs).

More on Codes & Standards

 
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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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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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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