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.
 Number of outside feeders 
supplying dwelling unit


Concealment of flexible cords and cables that are installed as an integral part of appliances—or when used for connecting other electrical equipment—is an ongoing issue for the electrical industry. The history of the National Electrical Code (NEC) provides some insight.


Article 100 of the National Electrical Code (NEC) defines “equipment” as a general term, including fittings, devices, appliances, luminaires, apparatus, machinery and the like, used as a part of, or in connection with, an electrical installation.

Traditional construction methods and techniques have evolved to be more efficient and cost-effective. Technology affords the construction industry the ability to model projects remotely and prefabricate many of the construction elements off-site.

More on Codes & Standards

 
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?

READ MORE
 
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

READ MORE
 
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

READ MORE
 
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.

READ MORE
 
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.

READ MORE
 
Derating Parallel Conductors
by Staff |

Few topics considered in NECA’s on-line “Code Question of the Day” have kindled more fiery disagreement than that of this month’s article.

READ MORE

Pages