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.
 Kitchen countertop receptacle height


Many of the articles I write for ELECTRICAL CONTRACTOR originate as questions from people who read my columns or attend my workshops.

Article 210 in the National Electrical Code (NEC) covers branch circuits, with the exception of circuits that supply motor loads only. Article 430 covers these branch circuits, and Part II covers motor-circuit conductors.

A reader wrote in that an inspector had turned down one of his projects, citing the installation was in violation of National Electrical Code (NEC) 517.13(A) and (B) because Type MC cable was installed in the patient-care areas.

More on Codes & Standards

 
Is It Worth Removing the Exceptions?
by Staff |

Herewith, various 1999 National Electrical Code (NEC) issues that do not warrant a whole page of discussion. This is an example of why it is wrong to follow a “remove exceptions” edict without first examining the consequences. The 1996 NEC, Section 410-12 reads as follows:

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Panelboard Mounting Heights, Fire Pump Electric Service, A/C Overcurrent Protection and More
by Staff |

CODE CITATIONS Article 110—Requirements for Electrical Installations; Article 230—Services; Article 240—Overcurrent Protection; Article 350—Flexible Metal Conduit; Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles; Article 430—Motors, Motor Circuits, and Controllers;

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Overcurrent Protection for Motor Circuits
by Staff |

There are many misconceptions in the field when dealing with motor circuits. Can the overcurrent protection device in the motor circuit be sized significantly larger than what is normally used to protect the circuit conductors?

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Call Before You Dig !!!
by Staff |

During the1999 National Electrical Code (NEC) cycle, Code-Making Panel 3 (CMP-3) accepted a revision to Section 300-5(d) that reads: “Service laterals that are not encased in concrete and that are buried 18 inches (457mm) or more below grade shall have their location identified by a warning ribbon t

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Section 384 Uncertainties Cleared Up
by Staff |

Since it first appeared in the 1953 National Electrical Code (NEC) as Sec. 3881 until the 1999 edition in Sec.

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Grounding and Bonding of Gas Piping
by Staff |

Judging by the responses to NECA’s online “Code Question of the Day (CQD),” gas piping and its use in bonding and grounding sure generated controversy and explosive comentary. The following questions and answers should clarify what many readers are asking.

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