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.
 Communications cable and 300.4(E)


Understanding the third article of the National Electrical Code (NEC), Article 110, Requirements for Electrical Installations, is essential to having a Code-compliant installation of the electrical system. 


In March, I attended a Central Arizona Chapter International Association of Electrical Inspectors (IAEI) meeting. A discussion ensued about the growing number of improperly installed and uncertified light-emitting diode (LED) retrofit lighting kits.

The National Electrical Code (NEC) contains the minimum requirements for a safe installation. One must do at least that much when installing electrical equipment and systems. This means understanding how to size electrical conductors of circuits, including the equipment grounding conductors (EGCs).

More on Codes & Standards

 
Branch-Circuit, Feeder and Service Calculations, Part XVI

Article 220—Load Calculations: 220.14 Motors


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Become a Problem Solver

Those of you tasked with selling fire detection and security systems for your company (and we are all in sales in one form or another) look for ways to set your company apart from the competition; most companies try to promote their strengths and benefits to an owner.


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Branch-Circuit, Feeder and Service Calculations, Part XV

Article 220—Load Calculations; 220.44 Receptacle Load—Other Than Dwelling Units  


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Working Space

How to determine requirements—part 2: To be on the safe side, the working space and space around electrical equipment should always be clear per 110.26(A), if possible.


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Grounding-Electrode Conductor Sizes, Disconnects and More

Article 210—Branch Circuits; Article 250—Grounding and Bonding; Article 320—Armored Cable: Type AC; Article 334—Nonmetallic-Sheathed Cable: Types NM, NMC and NMS; Article 430—Motors, Motor Circuits and Controllers; Article 440—Air-Conditioning and Refrigeration Equipment; Article 702—Optional Standb


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