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. 

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 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.

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

More on Codes & Standards

Pond Wiring, GFCI Receptacles and More

Article 110—Requirements for Electrical Installations; Article 210—Branch Circuits; Article 250—Grounding and Bonding; Article 314—Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures; Article 682—Natural and Artificially Made Bodies of Water; Article 695—Fire

Establishing an Electrically Safe Work Condition

NFPA 70E, Standard for Electrical Safety in the Workplace defines safe work practices for electrical construction and maintenance; the primary message of NFPA 70E is to turn off the power before working on electrical equipment.

Article 585: More Than Meets the Eye

The article could improve uptime of critical loads:

2008 National Electrical Code Revision Process Advances

The National Electrical Code Committee held two weeks of meetings last month in Redondo Beach, California; the purpose was to review and vote on nearly 2,500 public comments on proposals to revise the 2005 National Electrical Code (NEC).

Killer Heat

Last month's column discussed getting the most out your conductor ampacity, but the article did not really report the importance that wire terminations have on the final ampere rating of a conductor; many designers and electricians forget to consider the rating of the conductor versus the ability of

Illuminated Fountains, Voltage Drop and More

Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC and NNS; Article 422—Appliances; Article 440—Air Conditioning and Refrigerating Equipment; Article 647—Sensitive Electronic Equipment; Article 680—Swimming Pools, Fountains and Simi