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.
 Electrical systems expansion


Historically, the National Electrical Code (NEC) has required much of the electrical equipment, wiring methods and other electrical parts used in the electrical industry to be listed.

Section 110.26 of the National Electrical Code (NEC) requires specific minimums for working space around electrical equipment. Section 110.26 is divided into six subsections, and some of them contain even more subsections.


Every three years, the National Electrical Code (NEC) is revised and often expanded. As the 2017 NEC development cycle comes to a close, the final stages of the process unfold.

More on Codes & Standards

 
Working Space

How to determine requirements—part 2: To be on the safe side, the working space and space around electrical equipment should always be clear per 110.26(A), if possible.


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Grounding-Electrode Conductor Sizes, Disconnects and More

Article 210—Branch Circuits; Article 250—Grounding and Bonding; Article 320—Armored Cable: Type AC; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC and NMS; Article 430—Motors, Motor Circuits and Controllers; Article 440—Air-Conditioning and Refrigeration Equipment; Article 702—Optional Standb


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NFPA Moves to Streamline National Electrical Code Process

The National Fire Protection Association (NFPA) has revised its procedures to streamline approval of the National Electrical Code (NEC) at the association’s annual meeting, scheduled for June 4–7, 2007, in Boston.


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NECA Electrical Symbols Standard Now CAD-Compatible

"NECA 100-2006, Standard for Symbols for Electrical Construction Drawings” has been revised and updated. This ANSI-approved standard describes graphic symbols used to represent electrical wiring and equipment on construction drawings.


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At the Service Entrance

There are some issues involving installations in the National Electrical Code (NEC) that regularly generate considerable misunderstanding for installers, inspectors and engineers; recently, I was giving a workshop on the changes in the 2005 NEC, and as I was covering the change in Section 230.40, Ex


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