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 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.

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.

More on Codes & Standards

 
Down to Earth About Grounding

Ben Franklin already knew enough about grounding to keep the portion of the kite string he was holding dry. Otherwise when the lightning streaked down the wet part of the line and hit the key, he might have received more than a mild shcok when he moved his hand near the key.

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Editors' Pick
2014 NEC Outlook, Part II

Part I of this series reviewed some Code-wide revisions and some of the significant changes in Chapter 1 of the National Electrical Code (NEC). This segment takes a look at some significant revisions in chapters 2 and 3 (with the comment or proposal number cited after each listing).

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Know Your Type: Branch-circuit wiring in patient care areas


Someone recently inquired about the proper wiring methods in a patient care location of a healthcare facility. A few factors relate to this determination.

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NM Cable In A Drop Ceiling, Terminals For Multiple Conductors And More

Editor’s note: Charlie Trout is moving on to retirement. This edition of Code FAQs will be the last collection of questions and answers he will provide. For the next few months, tune in for a “best of” series of Code Questions of the Day by Charlie. A new writer will be introduced in January.

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Editors' Pick
2014 NEC Outlook

It seems like just yesterday that the NFPA Standards Council issued the 2011 National Electrical Code (NEC). However, we’ve moved on to the next one; the 2014 edition was up for approval in August.

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Sizing Conductors, Part XXVIII

There is more to sizing a conductor than just selecting a conductor from Table 310.15(B)(16) (formerly Table 310.16) in the National Electrical Code (NEC).

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Often Misunderstood

“Motor contribution” is only used in 240.86(C) in the National Electrical Code (NEC), but the NEC does not define it anywhere. A full explanation of this important electrical application is located in other publications, such as fuse and circuit-breaker protection books and articles.

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