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 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.

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.

More on Codes & Standards

Pay Attention to the Basics

Consider the fable about crying wolf. False alarms have the same effect in reducing the credibility of alarms. Individual experiences with home smoke alarms that keep going off from cooking develops a negative culture of response to real emergencies.

Disconnecting Means, GFCIs and More

Article 100—Definitions; Article 110—Requirements for Electrical Installations; Article 210—Branch Circuits; Article 300—Wiring Methods; Article 310—Conductors for General Wiring; Article 334—Nonmetallic Sheathed Cable: Type NM, NMC, and NMS; Article 408—Switchboards and Panelboards; Article 422—Ap

Spot the Differences

I had the privilege of being the guest speaker at a recent contractors meeting, and to my surprise, I was asked an unusual question by a well-known local contractor during the question-and-answer period.

Type NM Cable and More

Here's the fourth part of a series reviewing the most popular questions that have appeared in NECA’s online Code Question of the Day and have generated the most comments from subscribers. All answers are updated to comply with the 2008 National Electrical Code (NEC).

Healthy Separation

Emergency circuits are installed in patient bed locations in general care and critical care areas in hospitals to ensure power is available to electrical equipment even where normal power is lost for some reason.

Neutral Conductors as Grounds, Wire Ties with Branch Circuits and More

Article 210 Branch Circuits; Article 250 Grounding and Bonding; Article 300 Wiring Methods; Article 330 Metal Clad Cable: Type MC; Article 404 Switches; Article 422 Appliances; Article 450 Transformers and Transformer Vaults Including Secondary Ties; Article 590 Temporary Installations; Article 690