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. 

Article 90 is the introduction to the National Electrical Code (NEC) book, and it includes specifications that are essential to understanding the chapters and informative annexes that follow. For example, Article 90 explains how to recognize mandatory rules versus permissive rules.

During the recent 2017 National Electrical Code (NEC) first revision meetings in Hilton Head, S.C., a number of public inputs were submitted to introduce a new cabling system into Article 725 and Article 760.

The development process of the 2017 National Electrical Code (NEC) has begun. In January, 19 Code-making panels (CMPs) held their “first draft” meetings to address roughly 4,000 public inputs (PIs). The NEC is primarily a reactive code that evolves through demonstrated need.

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.
 Older Type BX cable and EGCs

More on Codes & Standards

Evolution of AFCIs and the <i>NEC</i>

ARC-FAULT CIRCUIT INTERRUPTERS (AFCIs) first made their appearance in the National Electrical Code (NEC) in 1999, with a mandatory effective date of Jan. 1, 2002. Research—conducted by Underwriters Laboratories Inc. (UL) for the U.S.

Branch-Circuit, Feeder and Service Calculations, Part VI

220.14 Other Loads—All Occupancies Load calculation requirements are in Article 220 of the National Electrical Code (NEC). This article provides requirements for calculating branch-circuit, feeder and service loads. Article 220 is divided into five parts.

Significant Issues

Every new National Electric Code (NEC) cycle brings issues of national importance to the forefront.

From Installer to Specifier

It’s hard to believe that electrical contractors still carry the “installer of product” stigma—especially when an ELECTRICAL CONTRACTOR report indicates that design/build projects account for 46 percent of contractor revenue.

Out of the Shadows

Imagine an electrical contractor meeting a homebuyer at the builder’s sales office. The contractor walks through the plans for the new house and asks the homeowner for a description of his lifestyle, the way he wants to use his home, what he expects it to be able to do.

From Concept to Punch List

Design/build has grown from 5 percent of nonresidential construction 20 years ago to more than 40 percent today.

Protection for MC Cable, Receptacles in Patient Care Areas and More

Protection for Type MC cable Q:Why does the National Electrical Code (NEC) require physical protection for Type MC cable where installed less than 1.25 inches from the surface for runs that are parallel to metal framing members, but this clearance is not required where the cable is pulled through pr