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

 
Bonding of Pool Water

There are times when an idea seems to take on a life of its own, and bonding of swimming pool water seems to be one of those. This idea was proposed for the 2005 National Electrical Code (NEC), passed at the proposal stage and was soundly rejected at the comment stage.


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Knowledge Beats Experience

Recently, I received a call from an electrician friend who wanted to know how to determine the difference between a raceway, nipple and sleeve, and this individual has been an electrician for 20-plus years.


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AFCI Circuit Breaker, UF Cable Temperature Rating and More

Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 250—Grounding and Bonding; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS; Article 340—Underground Feeder and Branch-Circuit Cable: Type UF; Article 406—Receptacles, Cord Connectors, and Attachment Plugs (Caps);


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Standards Understandably

Luckily for contractors, inspectors, specifiers and engineers alike, the National Electrical Code (NEC) is quite clear and concise when it comes to workmanship. Take, for instance, the “neat and workmanlike manner” requirement in 110.12 ... OK, that was a bad example.


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Isolated Ground Receptacles

Article 517 in the National Electrical Code (NEC) applies to electrical construction and installation criteria in healthcare facilities. Part II of Article 517 provides the requirements for wiring and protection in healthcare facilities and is applicable to all patient care areas.


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OCP for Class 2 and 3 Circuits

The overcurrent protection (OCP) for Class 2 and 3 circuits is inherent because it is equipped in their power supply. Separate OCP when used for these circuits only applies to the supply side of the power source.


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