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. 

In the past two National Electrical Code (NEC) cycles, there have been substantial changes in Article 517 dealing with healthcare facilities.

An equipment grounding conductor (EGC) installed with a branch circuit or feeder circuit performs three important functions in the electrical safety system. EGCs provide a path that connects equipment to ground, thereby performing grounding functions.

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 2017 NEC.
 Parallel equipment 
grounding conductors


The last section in Part II of Article 110 in the National Electrical Code (NEC) covers enclosure types. The section for enclosure types has not always been 110.28. Enclosure types has only been 110.28 since the 2011 edition of the NEC.

More on Codes & Standards

 
Purged and Pressurized Systems

This is a continuation of my last column, which was about the different types of purged and pressurized systems used in modern control rooms.


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Portable Swimming Pools, Outdoor Cable and More

Article 100—Definitions; Article 210—Branch Circuits; Article 250—Grounding and Bonding; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS; Article 404—Switches; Article 517—Health Care Facilities; Article 680 Swimming Pools, Fountains, and Similar Installations; Article 700—Emergency S


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Can I Really Do That?

There has been a substantial controversy raging throughout the electrical industry for a considerable time now, and hopefully, changes made for the 2008 National Electrical Code (NEC) will finally resolve this debate.


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Caution: Hazards Ahead

Recently, an electrical contractor and his foreman visited my office to talk about electrical equipment installed in hazardous locations, specifically about explosion-proof, intrinsically safe and nonincendive equipment as well as purged and pressurized systems.


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Developing 'World Class' Fire Alarm Technicians

Almost every owner or manager of a contracting firm brings up the challenging problem of finding and keeping qualified technicians. Some of the old-timers complain they can’t seem to figure out what motivates the younger technicians entering today’s marketplace.


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Function Follows Form

Members of a workshop I instructed on the National Electrical Code (NEC) asked me how to determine the ampacities of conductors based on how they are used in the electrical system.


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