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. 

In a recent training presentation, a question came up about the new identification requirements for automatically controlled receptacles. Does the marking need to be on the receptacle face, or is a marking on the faceplate in compliance?

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.
 GFCI protection of dishwashers 
in dwelling units 


Article 210 in the National Electrical Code (NEC) covers branch circuits, except when they supply only motor loads, which Article 430 covers. When sizing conductors for branch circuits, it is necessary to comply with the provisions in Article 210.

My last article provided a history and background on Article 400, dealing with flexible cords and cables. This month, I delve further into whether flexible cords and cables could or should be installed in concealed locations.

More on Codes & Standards

 
'I Just Want to Meet Code!'

Many professional contractors called to provide a fire alarm system in either a new or existing building have heard the owner exclaim, “I just want to meet code!” Most building owners (especially those not knowledgeable in the code process) have made the assumption that if they instruct you to “jus

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In the Interim

The May 2005 Code Applications column contained information on a major change in Article 680 for the 2005 National Electrical Code (NEC) concerning the construction requirements of fiberglass pools, vinyl-lined pools and concrete pools containing epoxy-coated rebar.

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Derating Type NM Cable, Fire Pump Power and More

Article 210 Branch Circuits Article 250 Grounding and Bonding Article 310 Conductors for General Wiring Article 334 Nonmetallic-Sheathed Cable: Types NM, NMC and NMS Article 410 Luminaires (Lighting Fixtures), Lampholders and Lamps Article 695 Fire Pumps Parts of the NFPA 20-2003-Standard for the In

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Pull- and Junction-Box Calculations, Part V

Provisions pertaining to the installation and use of all boxes and conduit bodies used as outlet, device, pull and junction boxes are in Article 314 of the National Electrical Code. Section 314.16 covers provisions for sizing boxes and conduit bodies containing conductors 18 AWG through 6 AWG.

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Grounding Electrodes, SE Cables and More

Fire pump disconnecting means Q: Is the disconnect for an electric motor driving a fire pump required to be within sight of the motor or is it permitted to be out of sight if capable of being locked in the off position? Can the disconnect and overcurrent protection be located in a panelboard?

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Pull- and Junction-Box Calculations, Part IV

314.28 Pull and Junction Boxes The National Electrical Code covers outlet, device, pull and junction boxes; conduit bodies; fittings; and handhole enclosures in Article 314.

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Emergency Protection ... Stat!

Providing mechanical protection for branch circuits supplying critical loads in a hospital is extremely important. Any potential damage to these circuits could cost lives.

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