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 310 in the National Electrical Code (NEC) covers general requirements for conductors and their type designations, insulations, markings, mechanical strengths, ampacity ratings and uses.

A recent change in the 2014 National Electrical Code (NEC) creates a new method for determining the size of service and feeder conductors for 120/240-volt (V), single-phase services for one-family, individual units of two-family dwellings, and individual units for multifamily dwellings.

The 2014 National Electrical Code (NEC) has new requirements for field-applied hazard warning markings, signs and labels. Throughout the NEC, rules that required signs, labels and other markings also required a specific signal word be included in the sign, label or marking.

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.
 Previous use of gray conductors


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CSI MasterFormat 2004 Part II

Most electrical contractors are so busy making the payroll and payables each week, they don’t pay much attention to changes coming their way until they are hit in the wallet.

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Parallel Conductors, Bathroom Circuits and More

Q: Does the National Electrical Code permit Class 2, Class 3 and telephone conductors to be installed in the same bored hole in a wooden stud with Type NM or Type AC cable operating at 120V?

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Pull and Junction Box Calculations

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Unplugging Fluorescents

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