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. 

For years, Article 516 of the National Electrical Code (NEC)— covering spray applications, dipping and coating processes using flammable liquids, combustible liquids and combustible powders—did not seem to change much, if at all.

National Electrical Code (NEC) sections 90.5(A) and (B) explain how to recognize mandatory rules and permissive rules. In accordance with 90.5(A), mandatory rules identify actions that are specifically required or are specifically prohibited.

Life is full of surprises, and so is the 2018 edition of NFPA 70E. After years of requiring specific information on arc flash equipment labels, as listed in 130.5(H1) through (H3), the 2018 edition has introduced Exception No.

The North American Electrical Safety System is made up of four vital components, and they all must be applied together for the system to function successfully.

More on Codes & Standards

General Installation Requirements, Part XXX

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.

Getting the Terminology Right for Healthcare Facilities

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

Equipment Grounding Conductor Performance

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.

Current Status of Electrical Codes

Working the day-to-day, it's sometimes easy to forget that the codes and standards for the electrical industry are living documents that change regularly to accommodate current technologies and trends as well as to better achieve their respective goals.

Codes, Codes And More Codes

U.S. Department of Energy (DOE) building energy codes were put into effect in the 1970s. Between 1992 and 2012, they have saved homeowners an estimated $15.6 billion.

Dead-Front Definition, GFCIs Inside Cabinets And More

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.
 Dead front?

Expanding Rules: Available Short-Circuit Current Requirements in the NEC

Available short-circuit current requirements were either added or changed in a number of locations in the 2017 National Electrical Code (NEC).