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

 
Branch Circuits And AFCIs, 70E's GFCI Requirements And More

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.
 Multiwire branch circuits and outlet-type AFCIs



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General Installation Requirements, Part XIV

Article 110 in the National Electrical Code (NEC) contains requirements that cover a wide variety of topics.


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Dry-type cast-resin transformer
Changes That Matter: Transformers

There are many types of transformers with just as many different uses.


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Approval Factors

In the construction industry, one of the important objectives of contractors and the construction team—aside from being paid for the job—is attaining National Electrical Code (NEC) compliance and final approval. In the electrical field, some key factors relate to achieving this ultimate goal.


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Type NM Cable, Ceiling Wires for Support And More

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.
 Type NM cable in raceways 
in wet locations



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Pass The Source: The Important Aspects of Transfer Switches


Transfer switches are the unsung and often neglected heroes of emergency, legally required standby and optional standby systems.


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General Installation Requirements, Part XIII

Most articles in the National Electrical Code (NEC) cover specific topics such as branch circuits, overcurrent protection, grounding and bonding, boxes, rigid metal conduit, motors, healthcare facilities, swimming pools and emergency systems.


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