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.
 Kitchen countertop receptacle height

Many of the articles I write for ELECTRICAL CONTRACTOR originate as questions from people who read my columns or attend my workshops.

Article 210 in the National Electrical Code (NEC) covers branch circuits, with the exception of circuits that supply motor loads only. Article 430 covers these branch circuits, and Part II covers motor-circuit conductors.

A reader wrote in that an inspector had turned down one of his projects, citing the installation was in violation of National Electrical Code (NEC) 517.13(A) and (B) because Type MC cable was installed in the patient-care areas.

More on Codes & Standards

A Brilliant Future

The U.S. market for ballasts ranges from about 77 to 100 million units for electronic and magnetic fluorescent devices.

Branch-Circuit, Feeder and Service Calculations, Part V

220.14 Other Loads—All Occupancies Article 220 of the National Electrical Code (NEC) provides requirements for calculating branch-circuit, feeder and service loads. An essential part of an electrician’s professional career is performing load calculations.

Bathroom Installations, Circuit Breakers and More

Switch height for paddle fan Q: Is there a minimum and maximum height for a wall switch that controls a paddle fan in a bedroom of a multifamily dwelling? A: There are no special rules for the height of a wall switch that controls a ceiling fan.

What's Protected?

Changes involving ground-fault circuit interrupter (GFCI) protection for personnel have been present in every National Electrical Code (NEC) cycle since GFCIs were inserted into the 1962 NEC.

Loss of Power Can Be Devastating

With the 2005 hurricane season a distinct memory for all involved in those tremendously destructive storms, recovery and reconstruction is a painfully slow process.

Overcurrent Protection, Disconnecting Means and Mo

Disconnecting means Q: Disconnecting means for circuits supplied by a generator are required where the circuits enter a building or structure. Are these disconnects from an outdoor generator required to meet the rules in Article 225? Is there a maximum number of disconnects permitted?