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. 

Ground-fault protection of equipment (GFPE) provides protection from devastating arcing events and destructive arcing burn-downs. National Electrical Code (NEC) sections 215.10, 230.95, 240.13 and 517.17 provide GFPE requirements, and Article 100 defines it.

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. Send questions to Answers are based on the 2017 NEC.
 NFPA 99 and Article 700

Terminology is the vocabulary of technical terms and usages appropriate to a particular trade, science or art. Does it matter what we call something in the National Electrical Code (NEC)?

Article 110 in the National Electrical Code (NEC), covers general requirements for the examination and approval, installation and use, access to and spaces about electrical conductors and equipment; enclosures intended for personnel entry; and tunnel installations. It contains five parts.

More on Codes & Standards

Start at the Beginning

In the last few editions of the National Electrical Code (NEC), more electrical equipment has been required to be rated for short-circuit current.

A Big Step Forward

Low-voltage contractors who are keeping abreast of developments in their industry know wireless technology is in the process of moving to its next generation of wireless access, which will be defined by the IEEE standard 802.11n.

Specify This

Whether they like it or not, electrical contractors are becoming more involved in the completion of design plans and the specification of products than ever before. And this is not just a disciplinary exercise of assuming greater engineering responsibility.

By Request

A faithful reader of ELECTRICAL CONTRACTOR asked how to design and install high-voltage feeders according to the 2008 National Electrical Code (NEC). He requested that I write an article pertaining to such an installation.

Only Time Will Tell

The 2008 National Electrical Code (NEC) includes a new definition covering “Intersystem Bonding Termination” and a total rewrite of Section 250.94 covering the requirements for installing a bonding connection point for communications systems.

Bone up on Requirements

A contracting firm I work for is bent out of shape over the new revised Section 210.4(B) and (D) in the National Electrical Code (NEC). The firm, plainly speaking, said this was going to require time to police the trimming out of a panelboard.

Snap Switches, Bonded Gas Piping and More

Article 220 Branch Circuit, Feeder, and Service Calculations; Article 240 Overcurrent Protection; Article 250 Grounding and Bonding; Article 404 Switches; Article 700 Emergency Systems; Guide Information for Electrical Equipment Directory (White Book) published by Underwriters Laboratories Inc.