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 110 in the National Electrical Code (NEC) contains general requirements for electrical installations. Some of the topics covered include examination and approval, installation and use, and access to and spaces about electrical conductors and equipment.


A caller recently asked if all 125-volt (V), 15- and 20-ampere (A) receptacles in a commercial kitchen were required to be ground-fault circuit interrupter (GFCI) protected, even where part of a listed assembly.

The decision to install and operate an ungrounded system is typically a combined effort that includes a design or engineering team, the owner, the operators and sometimes the authority having jurisdiction.

Slash-rated breakers on 480V ungrounded delta?


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.
 Slash-rated breakers on 480V ungrounded delta?


More on Codes & Standards

 
Can I Really Do That?

There has been a substantial controversy raging throughout the electrical industry for a considerable time now, and hopefully, changes made for the 2008 National Electrical Code (NEC) will finally resolve this debate.


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Caution: Hazards Ahead

Recently, an electrical contractor and his foreman visited my office to talk about electrical equipment installed in hazardous locations, specifically about explosion-proof, intrinsically safe and nonincendive equipment as well as purged and pressurized systems.


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Developing 'World Class' Fire Alarm Technicians

Almost every owner or manager of a contracting firm brings up the challenging problem of finding and keeping qualified technicians. Some of the old-timers complain they can’t seem to figure out what motivates the younger technicians entering today’s marketplace.


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Function Follows Form

Members of a workshop I instructed on the National Electrical Code (NEC) asked me how to determine the ampacities of conductors based on how they are used in the electrical system.


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Kitchen Exhaust Fans, Baseboard Heaters and More

Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 250—Grounding and Bonding; Article 300—Wiring Methods; Article 356—Liquidtight Flexible Nonmetallic Conduit: Type LFNC; Article 358—Electrical Metallic Tubing: Type EMT; Article 424—Fixed Electric Space Heating Equipment Groun


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