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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.

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Considering Voltage Drop, Counting The Neutral And More 

Charlie Trout

April 2013

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.

Code FAQs, National Electrical Code

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Sizing Conductors, Part XXIII 

Charles R. Miller

April 2013

Article 240 in the National Electrical Code (NEC) provides general requirements for overcurrent protection and overcurrent protective devices.

Code in Focus, National Electrical Code

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What’s On The Inside Counts 

Mark C. Ode

April 2013

Article 424 in the National Electrical Code (NEC) addresses fixed electric space heating equipment, stating, “for the purpose of the article, heating equipment shall include heating cable, unit heaters, boilers, central systems, or other approved fixed electric space-heating equipment.” Since the sc

Code Applications, National Electrical Code, Article 424

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What Is A ‘Ufer’ Ground? 

Michael Johnston

April 2013

At a recent seminar, one of the attendees asked, “What is a ‘Ufer’ ground?” This is a common question. A “Ufer” ground is slang for what the National Electrical Code (NEC) addresses as a concrete-encased grounding electrode.

Code Comments, National Electrical Code

More on Codes & Standards

Equipotential Plane and Voltage Gradients in Agricultural Settings and Raised Floors in IT Rooms

January 2001

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Codes & Standards

This month’s column addresses two rather different, recurring subjects on Electrical Contractor magazine’s “Online Code Question of the Day.” QUESTION: When building a barn for horses, I was required to establish an equipotential ground plane at the entrance, from the concrete floor of the barn to t

Article 370-Boxes, Conduit Bodies and Fittings

January 2001

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Codes & Standards

An enclosure that contains a device(s), or supports a fixture(s) or other equipment can be supported by the entering raceways when all of the following conditions are met: 1) the enclosure does not exceed 100 cubic inches in size; 2) the enclosure has threaded entries or hubs identified for the purp

Branch Circuits, Feeders, Service Calculations, Motors, Motor Circuits, Controllers, and More

December 2000

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Codes & Standards

CODE CITATIONS Article 210—Branch Circuits; Article 220—Branch-Circuits, Feeder, and Service Calculations; Article 225—Outside Branch Circuits and Feeders;

Outside Branch Circuits or Feeders—Is a Separate Disconnect Required?

December 2000

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Codes & Standards

In the 1996 National Electrical Code (NEC), Section 225-8, the requirements for installing a separate disconnecting means for a branch circuit or feeder to a separate building or structure on the same property were fairly simple.

The Assured Equipment Grounding Conductor Program

December 2000

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Codes & Standards

In keeping with the stated purpose of the National Electrical Code (NEC), the “practical safeguarding of persons and property…” protecting workers from electrical shock while using temporary power is of great concern for all electrical contractors.

Noteworthy Code Changes Concern Branch Circuits

December 2000

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