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 codefaqs@gmail.com. Answers are based on the 2017 NEC.
 White conductors 
in cable assemblies


For many years, the mystery of area classification has resided with a select group of experts within the electrical, petrochemical and industrial sectors. Many electricians, electrical engineers, fire inspectors and electrical inspectors have remained outside of this group.

In the 2017 National Electrical code (NEC), there are a few changes in 110.26. The first change is in subsection (A), which is part of a global change for the upper voltage threshold.

Before we proceed, in part 3 of this series, the change in Section 230.70(A)(4) dealing with service disconnects on one- and two-family dwellings was reversed during the late stages of the development process and never made it into the 2017 National Electrical Code (NEC).

More on Codes & Standards

 
Disconnect for Hot Tubs, GFCIs in Kitchens and Mor

CODE CITATIONS Article 210 Branch Circuits Article 250 Grounding Article 408 Switchboards and Panelboards Article 430 Motors, Motor Circuits and Controllers Article 680 Swimming Pools, Fountains and Similar Installations Volume One of the 2003 edition of the Fire Resistance Directory published by Un


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Standby Systems, Part I

This is the first of two parts about installing emergency, legally required and/or optional standby systems. This first part will cover the basics of the three systems and the second part will cover requirements for transfer equipment.


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Certifiably Good

Many of today’s electrical contractors are constantly trying to expand their offerings. In an effort to increase their marketability, these contractors are seeking certifications to broaden their knowledge base.


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Branch Circuits: Required Lighting Outlets, Part VI

210.70(A)(2) Lighting Outlets Required Branch circuit requirements are covered in Article 210 of the National Electrical Code. Part III of Article 210 covers required receptacle outlets and lighting outlets.


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Lamps in the Damp

Article 410 in the National Electrical Code (NEC) covers the installation of the wiring and the equipment forming the parts of lamps, luminaires (fixtures) and lampholders.


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Branch Circuits: Required Lighting Outlets, Part IV

210.70(A)(2) Lighting Outlets Required Requirements specifying wall switch-controlled lighting outlets (or receptacles) are covered in 210.70. This section contains three subsections: dwelling units, guest rooms and other than dwelling units.


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Receptacles in Wall Spaces, Insulating Bushings an

CODE CITATIONS Article 210 Branch Circuits Article 220 Branch Circuits, Feeder and Service Calculations Article 250 Grounding Article 320 Armored Cable Article 410 Luminaires (Lighting Fixtures), Lampholders and Lamps Article 430 Motors, Motor Circuits and Controllers Volume 1 of the Fire Resistance


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