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. 

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.

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.

More on Codes & Standards

 
From Concept to Punch List

Design/build has grown from 5 percent of nonresidential construction 20 years ago to more than 40 percent today.


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Protection for MC Cable, Receptacles in Patient Care Areas and More

Protection for Type MC cable Q:Why does the National Electrical Code (NEC) require physical protection for Type MC cable where installed less than 1.25 inches from the surface for runs that are parallel to metal framing members, but this clearance is not required where the cable is pulled through pr


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Design/Build in the Public Sector

The use of design/build as a project delivery system continues to grow in the United States. However, the adoption of design/build in the public sector has lagged the private sector since its rediscovery in the 1990s.


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A Brilliant Future

The U.S. market for ballasts ranges from about 77 to 100 million units for electronic and magnetic fluorescent devices.


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Branch-Circuit, Feeder and Service Calculations, Part VI

220.14 Other Loads—All Occupancies Load calculation requirements are in Article 220 of the National Electrical Code (NEC). This article provides requirements for calculating branch-circuit, feeder and service loads. Article 220 is divided into five parts.


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Branch-Circuit, Feeder and Service Calculations, Part V

220.14 Other Loads—All Occupancies Article 220 of the National Electrical Code (NEC) provides requirements for calculating branch-circuit, feeder and service loads. An essential part of an electrician’s professional career is performing load calculations.


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Bathroom Installations, Circuit Breakers and More

Switch height for paddle fan Q: Is there a minimum and maximum height for a wall switch that controls a paddle fan in a bedroom of a multifamily dwelling? A: There are no special rules for the height of a wall switch that controls a ceiling fan.


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