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

 
Read the Directions

JaeI receive many questions on how to design and install the electrical system for a separately derived system, including the use of the grounded neutral conductor. Naturally, grounding and bonding the secondary side always is a major issue as well as how the neutral conductor is used.


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Significant Changes for the 2008 NEC -Part 3

There were 3,688 proposals for changes to the National Electrical Code (NEC) and 2,349 comments processed by the National Fire Protection Association (NFPA) staff at its headquarters in Quincy, Mass. The following is part three in a series of significant changes for the 2008 NEC.


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AFCIs, Cable Trays and More

Article 100 Definitions; Article 210 Branch Circuits; Article 250 Grounding and Bonding; Article 300 Wiring Methods; Article 310 Conductors for General Wiring; Article 334 Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS; Article 392 Cable Trays; Article 422 Appliances; Article 440 Air-Conditionin


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A Serious Decision

Occasionally, a change occurs in the National Electrical Code (NEC), and the ramifications are not realized until after the Code is issued. One such change can be found in Section 210.4(B) in the 2008 NEC.


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Outdoor Receptactles, AFCIs and More

Article 110 Requirements for Electrical Installations; Article 210 Branch Circuits; Article 220 Branch Circuit, Feeder, and Service Calculations; Article 310 Conductors for General Wiring; Article 334 Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS; Article 358 Electrical Metallic Tubing: Type EM


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