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. 

Section 110.26 of the National Electrical Code (NEC) requires specific minimums for working space around electrical equipment. Section 110.26 is divided into six subsections, and some of them contain even more subsections.


Every three years, the National Electrical Code (NEC) is revised and often expanded. As the 2017 NEC development cycle comes to a close, the final stages of the process unfold.

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 codefaqs@gmail.com. Answers are based on the 2014 NEC.
 Electrical systems expansion


Historically, the National Electrical Code (NEC) has required much of the electrical equipment, wiring methods and other electrical parts used in the electrical industry to be listed.

More on Codes & Standards

 
PV Installation: Codes and Standards

The installation of photovoltaic (PV) equipment is governed by a number of industry codes and standards. Electrical contractors need to be aware of the codes and standards to ensure a safe and functional PV installation.


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Use the Service Entrance

The text in Section 230.40 covering the number of sets of service-entrance conductors for each service drop or lateral has not changed since it was accepted into the 1984 National Electrical Code (NEC).


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Avoiding the Pitfalls

According to the Design-Build Institute of America (DBIA) “Design-Build is a process that has been embraced by the world's great civilizations. In ancient Mesopotamia, the Code of Hammurabi (1,800 BC) fixed absolute accountability upon master builders for both design and construction.


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Box-Fill Calculations, Part X

314.16 Number of Conductors in Outlet, Device, and Junction Boxes, and Conduit Bodies The National Electrical Code has specific requirements detailing how to calculate the maximum number of conductors in boxes (outlet, device, junction, etc.) and conduit bodies.


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New Method to Protect Circuits

Arc-fault circuit-interrupter(AFCI) protection requirements were first submitted to the National Electrical Code (NEC) process for the 1996 NEC but were not accepted until the 1999 NEC.


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Box-Fill Calculations, Part IX

314.16 Number of Conductors in Outlet, Device, and Junction Boxes and Conduit Bodies Section 314.1 covers the scope of Article 314. This article covers the installation and use of all boxes and conduit bodies used as outlet, device, junction or pull boxes, depending on their use.


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Safety Horizon: 70E Standard

Twenty-five years ago, the National Fire Protection Association (NFPA) first prepared a set of standards to ensure electrical workers were safe on their jobs. So why has this standard-known as the NFPA 70e-suddenly become such a big deal?


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