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.
 Panelboards in cabinets?


Electrical overcurrent protective system Coordination can be complex and daunting. It is best approached with knowledge of the basics and proper system design.

Without very specific National Electrical code (NEC) rules for determining the right size conductor and the correct size overcurrent protective device, a conductor could overheat and even start a fire.

This article is part 4 in a series that reviews some of the more significant revisions and new requirements in the next National Electrical Code (NEC).

More on Codes & Standards

 
CSI MasterFormat 2004 Part II

Most electrical contractors are so busy making the payroll and payables each week, they don’t pay much attention to changes coming their way until they are hit in the wallet.


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Pull- and Junction-Box Calculations, Part II

314.28 Pull and Junction Boxes The National Electrical Code (NEC) has specific requirements detailing how to calculate the maximum numbers of conductors in boxes (outlet, device, junction, pull, etc.) and conduit bodies.


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Utility-Interactive PV Systems

A utility-interactive photovoltaic (PV) system is defined in Section 690.2 of the National Electrical Code (NEC) (NFPA 70-2005) as a “photovoltaic system that operates in parallel with and may deliver power to an electrical production and distribution network.” NEC Article 690 covers Solar Photovol


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When to Supplement

A new definition covering supplementary overcurrent-protective devices has been added to Article 100 in the 2005 National Electrical Code (NEC) to indicate that limited protection may be provided for specific applications or utilization equipment.


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Connecting Kitchen Hood Fans, Indoor Receptacles, and More

Laundry GFCI receptacles Q: Are all 15- and 20-ampere, 125V receptacles installed within six feet of a laundry or utility sink in a dwelling occupancy required to be protected by a ground fault circuit interrupter even where the receptacle is not readily accessible such as behind a clothes washer o


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Pull and Junction Box Calculations

314.28 Pull and Junction Boxes Article 314 of the National Electrical Code (NEC) covers the installation and use of all boxes and conduit bodies used as outlet, device, junction or pull boxes.


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Unplugging Fluorescents

With the acceptance of the 2005 National Electrical Code (NEC), installing and servicing fluorescent luminaires (fixtures) has become a complex situation. The design and layout of the lighting system is critical in determining certain required added features.


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