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. 

Article 210 in the National Electrical Code (NEC) covers branch circuits, except when they supply only motor loads, which Article 430 covers. When sizing conductors for branch circuits, it is necessary to comply with the provisions in Article 210.

My last article provided a history and background on Article 400, dealing with flexible cords and cables. This month, I delve further into whether flexible cords and cables could or should be installed in concealed locations.

In a recent training presentation, a question came up about the new identification requirements for automatically controlled receptacles. Does the marking need to be on the receptacle face, or is a marking on the faceplate in compliance?

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.
 GFCI protection of dishwashers 
in dwelling units 


More on Codes & Standards

 
Loop Length, Underground Feeders and More

If you have a problem related to the National Electrical Code (NEC), are experiencing difficulty in understanding a Code requirement, or are wondering why or if such a requirement exists, ask Charlie, and he will let the Code decide. Questions can be sent to codefaqs@earthlink.net.

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Not as Easy as It Looks

The term “integrated systems” has appeared to some of us in the field to represent secret meaning for saving money by combining systems.

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Fire Alarm System Submission

Recently, while attending a lunch-and-learn presentation from one of the better local distributors of fire alarm systems, we wound up discussing the quality of fire alarm system submissions from contractors.

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Carbon Monoxide Detection

Carbon monoxide (CO) is a colorless, odorless and tasteless gas that in sufficient concentrations, can threaten life.

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How Many Is Too Many?
by Staff |

With the proliferation of electrical and electronic medical equipment in general care or critical care patient bed locations of a hospital, the number of branch circuits necessary to supply the equipment and the number of receptacles on these branch circuits becomes a real dilemma.

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Supply on the Ground

Last month, I discussed using the grounded conductor to ground and bond a separately derived system. In this issue, I discuss using the grounded conductor to ground and bond the distribution panel in a structure when supplied from switchgear in a substation or another structure.

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Ground Rings, Common Conductors and More

If you have a problem related to the National Electrical Code (NEC), are experiencing difficulty in understanding a Code requirement, or are wondering why or if such a requirement exists, ask Charlie, and he will let the Code decide. Questions can be sent to codefaqs@earthlink.net.

READ MORE

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