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.
 Kitchen countertop receptacle height


Many of the articles I write for ELECTRICAL CONTRACTOR originate as questions from people who read my columns or attend my workshops.

Article 210 in the National Electrical Code (NEC) covers branch circuits, with the exception of circuits that supply motor loads only. Article 430 covers these branch circuits, and Part II covers motor-circuit conductors.

A reader wrote in that an inspector had turned down one of his projects, citing the installation was in violation of National Electrical Code (NEC) 517.13(A) and (B) because Type MC cable was installed in the patient-care areas.

More on Codes & Standards

 
From Installer to Specifier

It’s hard to believe that electrical contractors still carry the “installer of product” stigma—especially when an ELECTRICAL CONTRACTOR report indicates that design/build projects account for 46 percent of contractor revenue.

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Out of the Shadows

Imagine an electrical contractor meeting a homebuyer at the builder’s sales office. The contractor walks through the plans for the new house and asks the homeowner for a description of his lifestyle, the way he wants to use his home, what he expects it to be able to do.

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From Concept to Punch List

Design/build has grown from 5 percent of nonresidential construction 20 years ago to more than 40 percent today.

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Protection for MC Cable, Receptacles in Patient Care Areas and More

Protection for Type MC cable Q:Why does the National Electrical Code (NEC) require physical protection for Type MC cable where installed less than 1.25 inches from the surface for runs that are parallel to metal framing members, but this clearance is not required where the cable is pulled through pr

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Design/Build in the Public Sector

The use of design/build as a project delivery system continues to grow in the United States. However, the adoption of design/build in the public sector has lagged the private sector since its rediscovery in the 1990s.

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A Brilliant Future

The U.S. market for ballasts ranges from about 77 to 100 million units for electronic and magnetic fluorescent devices.

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Branch-Circuit, Feeder and Service Calculations, Part VI

220.14 Other Loads—All Occupancies Load calculation requirements are in Article 220 of the National Electrical Code (NEC). This article provides requirements for calculating branch-circuit, feeder and service loads. Article 220 is divided into five parts.

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