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.
 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.

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?

More on Codes & Standards

 
Branch Circuits, Lampholders, Motor Controllers, and More
by Staff |

CODE CITATIONS Article 210—Branch Circuits; Article 410—Lighting Fixtures, Lampholders, Lamps, Receptacles; Article 430—Motors, Motor Circuits, Controllers Motor branch circuit protection

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Sizing an Equipment Grounding Conductor for a Tap
by Staff |

Tapping a smaller conductor from a larger conductor is common in many electrical installations. Article 240 provides information on the minimum size of tap conductors for installations based upon the overcurrent protection device’s size and location.

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Designing by the Code
by Staff |

In July’s Code Corner, we discussed the location of motor/controller disconnecting means as required by Section 430-102.

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NEC and OSHA Add to Confusion about GFCIs
by Staff |

Ground fault circuit interrupters (GFCIs) have been around since the early 60s, yet there is much confusion about their use and how they operate.

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Flexible Metal Conduit Length, Use of the Term 'Tap' Conductor for High-temp Wires
by Staff |

Since the 1940 National Electrical Code (NEC), there has been a requirement that recessed incandescent fixtures be connected by wire having insulation suitable for the temperature.

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Overcurrent Protection for Motor Installations, Part II
by Staff |

This month’s column will continue with questions and answers relating to overcurrent protection for conductors in motor and controller circuits and overload protection for motors.

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