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. 

Auxiliary grounding electrodes


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 2017 NEC.
 Auxiliary grounding electrodes


During the past couple of months, I have had questions about whether a chase nipple, a raceway (conduit) nipple or a hub can be used to enter into panelboards, load centers, switchboards, switchgear, motor control centers and substations as transitions from cable trays into enclosures.

Article 110 in the National Electrical Code (NEC) contains general requirements for electrical installations. Topics include examination and approval, installation and use, and access to and spaces about electrical conductors and equipment. This article is divided into five parts.


This article provides a review of the significant changes to the rules for healthcare facilities contained in Chapter 5, Special Occupancies, in the 2017 edition of the National Electrical Code (NEC).
 517.2 Governing Body of Health Care Facilities


More on Codes & Standards

 
The NEC requires an effective ground-fault current path for medium- and high-voltage services.
Gone To Ground

Part X of Article 250 in the National Electrical Code (NEC) provides the grounding requirements for systems and circuits of greater than 1,000 volts (V).


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As Seen On Canadian TV

During a recent training program on the National Electrical Code (NEC), a question arose about panelboards and whether they could be installed in a horizontal orientation rather than vertically. This has come up often, probably due to various home-improvement broadcasts that are produced in Canada.


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NECA Offers OSHA Friendly Advice

In February’s column, I discussed why the Electrical Transmission & Distribution (ET&D) Partnership is an example of an Occupational Safety and Health Administration (OSHA) cooperative program that has worked out extremely well.


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Removing Old Cable, Bonding Hot Tubs 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.
 Abandoned cable in ceiling



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Sizing Conductors, Part XXXV

Transformer secondary conductor rules are similar to the rules for tap conductors. Rules for transformer secondary conductors and tap conductors are even in the same section of the National Electrical Code (NEC).


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The Arc Energy Covenant

Available fault current, short-circuit current rating, arc energy, arc flash hazards, and incident energy are closely related in both the National Electrical Code (NEC) and NFPA 70E, Standard for Electrical Safety in the Workplace.


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