Electrical Contractor Magazine

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 2014 NEC.
 Type SE cable support


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

For many years, Article 250, which covers grounding and bonding in the National Electrical Code (NEC), only contained two tables. Table 250.122 was used for sizing the equipment grounding conductors, based on the size of the overcurrent protective device in the circuit.

Energy management is becoming commonplace in today’s electrical infrastructures through the control of utilization equipment, energy storage and power production. Yet, limited consideration is found in electrical installation standards to actively manage these systems.

Electrical Contractor Magazine

More on Codes & Standards

 
Which Is It?
by Staff |

Motor-control circuits may be very low voltage; they may be in the 12- to 24-volt (V) alternating current (AC) or direct current (DC) range or as high as 600V.

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Arbiter of an Argument

A contractor asked me to inspect the grounding and bonding of a service that he installed for a customer. He was told that the service had been grounded wrong and that it was dangerous to be powered up by the utility. Therefore, the owner would not pay the contractor for services rendered.

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Sizing Grounding Electrode Conductors, Restroom Receptacles 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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Sizing Conductors, Part XVI

When sizing conductors, the rating of the overcurrent device must also be considered.

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Necessary or Not?
by Staff |

A question was raised at a recent meeting that I attended. It started a search through both current and older versions of the National Electrical Code (NEC).

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Who Wants to Know?

Through the years, I have instructed many seminars for folks using NFPA 70E, the Standard for Electrical Safety in the Workplace. Participants often ask the same questions. Here are the most frequently asked questions about NFPA 70E. Does 70E apply to personnel performing electrical installations?

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Disconnecting Means, GTO Cable 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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