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. 

Point of supply


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.
 Point of supply


The model building code treats campus dormitories as residential occupancies. However, a dorm does not function the same as a commercial apartment building. In some cases, the architect has created a physical design to accommodate as many students as possible.

Are multiwire branch circuits becoming antiquated for most new installations, or are they still being used in most circuit applications?

The National Electrical Code (NEC) is divided into an introduction and nine chapters with 10 informational annexes. As specified in 90.5(D), the informative annexes are not part of the NEC’s enforceable requirements but are included for informational purposes only.

Electrical Contractor Magazine

More on Codes & Standards

 
Identification of Disconnecting Means

One of the most important NEC requirements (and yet one most often ignored) is 110.22: Identification of Disconnecting Means. It reads: “Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so the purpose is evident.

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Certification as Separation

Photovoltaic (PV) modules convert sunlight into electrical energy that can be used to provide power for specific loads within a building in a standalone system or as a supplement to the building’s utility power supply in an integrated system.

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The Ins and Outs of AFCI Protection

The arc-fault circuit-interrupter (AFCI) has been around for three National Electrical Code (NEC) cycles and, with the advent of the new 2005 NEC, will have been present in three editions, although with various changes within each edition.

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Liability Risks in Healthcare Facilities

Contractors need to develop highly specialized knowledge Healthcare facilities present the potential for financial gain for properly qualified electrical contractors. These projects also present a downside of risk of increased liability due to the nature of the projects and potential damages.

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A Question of Protection

In many conversations with electrical inspectors on the subject of arc-fault circuit-interrupters (AFCIs), I find them variously questioning, doubtful, confused, bewildered and puzzled concerning the application of 210.12.

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Wall Space in Dwelling Units, Bonding Metal Water and More

CODE CITATIONS Article 110 Requirements for Electrical Installations Article 210 Branch Circuits Article 250 Grounding Article 310 Conductors for General Wiring Article 314 Outlet, Device, Pull and Junction Boxes; Conduit Bodies; Fittings; and Manholes Article 410 Luminaires (Lighting Fixtures), Lam

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Extra Credit

Owners often contact contractors to install fire alarm systems in existing buildings. And, just as often, the Code does not require these installations. Rather, the building owner simply wants a fire alarm system installed for his or her own peace of mind.

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