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.
 OCPD for a fire pump


Some regular National Electrical Code (NEC) users may not have noticed major changes in the 2014 and 2017 editions dealing with the emergency and standby power requirements in Article 700, Emergency Systems; Article 701, Legally Required Standby Systems; and Article 702, Optional Standby Systems.

As stated in 90.1(A) of the National Electrical Code (NEC), the purpose of the Code is the practical safeguarding of people and property from hazards arising from the use of electricity.

This article provides a review of more significant changes to the rules for special equipment covered in Chapter 6, Special Equipment, of the 2017 National Electrical Code (NEC).
 600.2 Definitions and 600.34 
PV Powered Signs


More on Codes & Standards

 
USE by SE

Article 338 of the National Electrical Code (NEC) covers the use, installation and construction specifications of service-entrance (SE) cable. Electricians commonly use these cables for service conductors and for feeders and branch circuits in residential and small commercial installations.


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Which Size Box?

An electrician asked me a very interesting question concerning the sizing of a junction or pull box and the difference between the two. They are basically the same. Electricians use junction and pull boxes as access points for pulling and feeding conductors through raceway systems.


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Study Shines New Light on Old Problems Behind the Walls

In the decades since the U.S. Consumer Product Safety Commission determined that electrical fires are disproportionately frequent in homes more than 40 years old, a generation of houses has aged into the danger zone.


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Bonding Hydromassage Tubs, Wet Locations and More

Article 300 Wiring Methods; Article 310 Conductors for General Wiring; Article 410 Luminaires, Lampholders, and Lamps; Article 440 Air-Conditioning and Refrigerating Equipment; Article 517 Health Care Facilities; Article 680 Swimming Pools, Fountains, and Similar Installations; Article 700 Emergency


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Keep It Covered

In many states, laws exist that allow the electrical contractor to design fire alarm systems for projects he is selling and installing for a customer.


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Color of conductors, Taper-Resistant Receptacles and Mor

Article 210 Branch Circuits; Article 250 Grounding and Bonding; Article 300 Wiring Methods; Article 310 Conductors for General Wiring; Article 408 Switchboards and Panelboards; Article 430 Motors, Motor Circuits, and Controllers Grounding isolated EGCs


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Branch-Circuit, Feeder and Service Calculations, Part XXIX

The National Electrical Code (NEC) contains an introduction, nine chapters and eight annexes. Article 90 is the introduction to the NEC. This article contains specifications that are essential to all chapters and sections in the Code.


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