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

Changes to NFPA 70E - 2009

The Occupational Safety and Health Administration (OSHA) requires that employers covered under the Occupational Safety and Health Act of 1970 provide employees an environment that is free from recognized hazards that cause, or are likely to cause, death or serious physical harm (OSHA 29 CFR 1926 and

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.