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 2014 NEC.
 Number of outside feeders 
supplying dwelling unit

Concealment of flexible cords and cables that are installed as an integral part of appliances—or when used for connecting other electrical equipment—is an ongoing issue for the electrical industry. The history of the National Electrical Code (NEC) provides some insight.

Article 100 of the National Electrical Code (NEC) defines “equipment” as a general term, including fittings, devices, appliances, luminaires, apparatus, machinery and the like, used as a part of, or in connection with, an electrical installation.

Traditional construction methods and techniques have evolved to be more efficient and cost-effective. Technology affords the construction industry the ability to model projects remotely and prefabricate many of the construction elements off-site.

More on Codes & Standards

Sizing Conductors, Part IX

When sizing conductors, the number of current-carrying conductors installed in a raceway or cable must be considered. No conductor shall be used in such a manner that its operating temperature exceeds that which is designated for the type of insulated conductor involved [310.15(A)(3)].

Codes and Standards Face Forward

As the electrical industry is poised for some big changes—with the continued development of smart grids, alternative energy and the rapid expansion of data centers—codes- and standards-making bodies are crafting new standards and clarifying old ones.

Give Contractors a Designer's View

BICSI’s healthcare subcommittee’s new document will offer increased detail on systems used in healthcare environments. Notably, it will showcase additional industry issues low-voltage contractors need to consider.

But Wait, There's More!

Happy New Year! Even though we are only a few weeks into the new year, NFPA celebrated 2012 several months ago with the introduction of the ninth edition of NFPA 70E, the Standard for Electrical Safety in the Workplace.

Boat Dock Conduit, Pool Deck Heating and More

If you have a problem related to the National Electrical Code (NEC), are experiencing difficulty in understanding a Code requirement, or are wondering why or if such a requirement exists, ask Charlie, and he will let the Code decide. Questions can be sent to

LEDs Are Everywhere

In the past few editions of the National Electrical Code (NEC), light-emitting diode (LED) illumination systems have been inserted into almost every article where lighting is mentioned.

See You on the Supply Side

At a recent workshop that I was teaching, a question was asked about how the grounded conductor was to be installed and used when routed from the outside utility transformer to service equipment located inside the facility.