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.
 Pull boxes for communications cable


Article 110 in the National Electrical Code (NEC) covers general requirements for the examination and approval, installation and use, and access to spaces about electrical conductors and equipment; enclosures intended for personnel entry; and tunnel installations (110.1).

The DC Task Group of the NEC Correlating Committee is proposing three new articles for the 2017 edition of the National Electrical Code (NEC). The first is Article 706, covering energy-storage systems (ESS). The second is Article 710, covering microgrids.

by
Staff  

The National Electrical Code (NEC) requires all boxes and enclosures—including transfer switches, generators and power panels that are part of an emergency system—to be marked so they are readily identifiable as a component of the emergency system.

Electrical Contractor Magazine

More on Codes & Standards

 
Box-Fill Calculations, Part X

314.16 Number of Conductors in Outlet, Device, and Junction Boxes, and Conduit Bodies The National Electrical Code has specific requirements detailing how to calculate the maximum number of conductors in boxes (outlet, device, junction, etc.) and conduit bodies.

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Safety Horizon: 70E Standard

Twenty-five years ago, the National Fire Protection Association (NFPA) first prepared a set of standards to ensure electrical workers were safe on their jobs. So why has this standard-known as the NFPA 70e-suddenly become such a big deal?

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New Method to Protect Circuits

Arc-fault circuit-interrupter(AFCI) protection requirements were first submitted to the National Electrical Code (NEC) process for the 1996 NEC but were not accepted until the 1999 NEC.

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Box-Fill Calculations, Part IX

314.16 Number of Conductors in Outlet, Device, and Junction Boxes and Conduit Bodies Section 314.1 covers the scope of Article 314. This article covers the installation and use of all boxes and conduit bodies used as outlet, device, junction or pull boxes, depending on their use.

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Box-Fill Calculations, Part VIII

Article 314 C Outlet, Device, Pull and Junction Boxes; Conduit Bodies; Fittings; and Manholes 314.16(B) Box-Fill Calculations Article 314 of the National Electrical Code contains requirements pertaining to the installation and use of all boxes and conduit bodies used as outlet, device, junction or

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Meter Sockets, Laundry Room Receptacles and More

Article 90 Introduction Article 210 Branch Circuits Article 220 Branch-Circuit, Feeder, and Service Calculations Article 230 Services Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 406 Receptacles, Cord Connectors and Attachment Plugs (Cap

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Box-Fill Calculations, Part VII

314.16(B) Box-Fill Calculations The National Electrical Code contains provisions for the maximum numbers and sizes of conductors that can be installed in boxes and conduit bodies.

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