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. 

Does the National Electrical Code (NEC) address conductor-withstand ratings for wire-type equipment grounding conductors (EGCs)? Yes, but it is worthy of a more detailed explanation.

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.
 Grounded conductor 
terminations, panelboards

Conductor identification requirements are located in articles throughout the National Electrical Code (NEC). The first such requirement is in Article 110, and it pertains to a specific type of electrical system.

The National Electrical Code (NEC) uses the word “harmonic” exactly 11 times, all in combination with or explanation of neutral conductors. However, “harmonic” is not defined in the NEC.

More on Codes & Standards

Swimming Pools, Electric Ranges and More

Article 250—Grounding and Bonding; Article 517—Health Care Facilities; Article 680—Swimming Pools, Fountains, and Similar Installations; Article 700—Emergency Systems; Article 702—Optional Standby Systems; Various parts of the 2006 edition of Guide Information for Electrical Equipment (White Book) p

NECA's Handprints All Over 2008 Code

The 2008 edition of the National Electrical Code (NEC)was approved last month at the National Fire Protection Association (NFPA) World Safety Conference & Exposition in Boston.

Significant Changes for the NEC 2008

There were 3,688 proposals for changes to the National Electrical Code (NEC) and 2,349 comments processed by the National Fire Protection Association (NFPA) staff at NFPA headquarters in Quincy, Mass.

2008 National Electrical Code Approved

The 2008 National Electrical Code (NEC) was approved in June at the annual meeting of the National Fire Protection Association (NFPA) in Boston.

Class 2 and 3 Circuits

Class 2 and 3 circuits are defined as the portion of the wiring system between the power source and the connected equipment.

Lying Down on the Job

As my March 2007 column “At the Service Entrance” detailed, inspectors, manufacturers, contractors and electricians have long debated the installation orientation of panelboards and circuit breakers. Should a panelboard be installed in only a vertical position, or can it be installed horizontally?