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 2017 NEC.
 Parallel equipment 
grounding conductors


The last section in Part II of Article 110 in the National Electrical Code (NEC) covers enclosure types. The section for enclosure types has not always been 110.28. Enclosure types has only been 110.28 since the 2011 edition of the NEC.

In the past two National Electrical Code (NEC) cycles, there have been substantial changes in Article 517 dealing with healthcare facilities.

An equipment grounding conductor (EGC) installed with a branch circuit or feeder circuit performs three important functions in the electrical safety system. EGCs provide a path that connects equipment to ground, thereby performing grounding functions.

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Kitchen Exhaust Fans, Baseboard Heaters and More

Article 210—Branch Circuits; Article 240—Overcurrent Protection; Article 250—Grounding and Bonding; Article 300—Wiring Methods; Article 356—Liquidtight Flexible Nonmetallic Conduit: Type LFNC; Article 358—Electrical Metallic Tubing: Type EMT; Article 424—Fixed Electric Space Heating Equipment Groun


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Voltage Between Adjacent Devices

Occasionally, an electrical installation practice is discovered that is dangerous to both electrical maintenance personnel and the facility where it is located.


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Protecting Transformers

Protection for transformers rated 600 volts or less is determined by selecting one of three levels of full load current (FLC) found in Table 450.3(B) of the National Electrical Code (NEC). Levels are based on either primary protection only or by providing both primary and secondary protection.


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Electrode Conductors, AFCIs and More

Article 110—Requirements for Electrical Installations; Article 210—Branch Circuits; Article 250—Grounding and Bonding; Article 392—Cable Trays; Article 408—Switchboards and Panelboards; Article 517—Health Care Facilities; Article 680—Swimming Pools, Fountains, and Similar Installations; The 2006 ed


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NECA Standards Executive Director and Fiancee Missing

At approximately 2 pm on Friday, August 24, 2007, National Electrical Contractors Association (NECA) Standards Executive Director Brooke Stauffer and his fiancée, Karen Dodds, went missing as she flew her small, single-engine plane over Lake Huron.


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Significant Changes for the 2008 NEC -Part 2

There were 3,688 proposals for changes to the National Electrical Code (NEC) and approximately 2,500 comments processed by National Fire Protection Association staff at NFPA headquarters in Quincy, Mass. The following is part two in a series of significant changes for the 2008 NEC.


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