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.
 Stranded conductor terminations 


Selecting the correct size conductor is not difficult, but it involves more than selecting a conductor based solely on the ampacity shown in Table 310.15(B)(16) in the National Electrical Code (NEC).

The concept of modular data centers (MDCs) originated about six or seven years ago as a portable method of delivering information technology data center capacity without the high cost and long construction time.

Grounding electrode conductor connections are an important part of any electrical safety system. These connections ensure the path to ground through any of the grounding electrodes identified in Section 250.52(A).

More on Codes & Standards

 
Sizing Conductors, Part XVI

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

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New Building Standards to Save Money and Power

Always a leader in renewable power and new technology, the Golden State has taken another step to make sure it stays out in front.

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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.

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Sizing Conductors, Part XV

Table 310.15(B)(16) in the National Electrical Code (NEC) provides allowable or maximum ampacities for insulated conductors rated up to and including 2,000 volts (V).

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A Unified Method

Lately, inspectors from a third-party inspection company have been asking me about determining the number of circuits required for outlets installed in dwelling units.

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