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. 

For years, Article 516 of the National Electrical Code (NEC)— covering spray applications, dipping and coating processes using flammable liquids, combustible liquids and combustible powders—did not seem to change much, if at all.

National Electrical Code (NEC) sections 90.5(A) and (B) explain how to recognize mandatory rules and permissive rules. In accordance with 90.5(A), mandatory rules identify actions that are specifically required or are specifically prohibited.

Life is full of surprises, and so is the 2018 edition of NFPA 70E. After years of requiring specific information on arc flash equipment labels, as listed in 130.5(H1) through (H3), the 2018 edition has introduced Exception No.




The North American Electrical Safety System is made up of four vital components, and they all must be applied together for the system to function successfully.

More on Codes & Standards

 
Terminating Grounding Electrodes, Making Sense Of AFCIs 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.
 Grounding electrode
conductor termination



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General Installation Requirements, Part VII

The first National Electrical Code (NEC) was developed in 1897. The National Fire Protection Association (NFPA) became the developer and publisher of the National Electrical Code (NEC) in 1911, and the NFPA continues to develop and publish the Code today.


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Duct And Cover

New text in section 424.66(A) of the 2014 National Electrical Code (NEC) covers working space for electrical enclosures of resistance heating-element-type duct heaters mounted on air-duct systems in limited-access areas.


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Motor Got Disconnected

For many years, The National Electrical Code (NEC) has provided rules for equipment disconnects. NEC requirements are very specific for motors and motor-driven machinery, but they differ from lockout/tagout rules in NFPA 70E, Standard for Electrical Safety in the Workplace. The reason is simple.


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EMT Support, Powering Up A Trailer 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.
 Unsupported raceways



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General Installation Requirements, Part VI

National Electrical Code (NEC) Article 110, “Requirements for Electrical Installations,” applies generally to all electrical installations, like all of the articles located in the first four chapters.


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Powering Down Carefully

Safety for solar photovoltaic (PV) systems has come a long way since the first installation requirements were inserted as Article 690 into the 1984 National Electrical Code (NEC).


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