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

 
Conduit Fill and Amapacity Calculations for Low-voltage Systems
by Staff |

Where installing Class 2 or Class 3 remote control, signaling, or power limited circuits in a raceway or where installing power-limited fire alarm circuits in a raceway, is it necessary to figure conduit fill?

READ MORE
 
Up in the Air Over Mounting Transformers
by Staff |

A proposed location for a 112-kVa 480Y/277 dry transformer suspended above the working space for a switchboard raises several questions.

READ MORE
 
Dedicated Space
by Staff |

Relocating the requirements for dedicated space below and above switchboards, panelboards, and motor control centers from Sec. 384-4 to Sec. 110-26 (110-16 in the '96 NEC logically combines these requirements with their related working space.

READ MORE
 
Code Questions and Answers
by Staff |

Code Citations Article 225-Outside Branch Circuits and Feeders; Article 240-Overcurrent Protection; Article 250-Grounding; Article 400-Flexible Cords and Cables; Article 430-Motors, Motor Circuits, and Controllers; Article 445-Generators; Article 450-Transformers and Transformer Vaults.

READ MORE
 
CODE QUESTION OF THE MONTH
by Staff |

With this issue of Electrical Contractor, we're pleased to introduce a new monthly column.

READ MORE
 
Separating Voice/data from Power Conductors
by Staff |

The National Electrical Code (NEC), Class 2 and Class 3 covers remote-control, signaling, and power-limited circuits covered by Chapter 7 in Article 725. They are considered to be a special condition other than a normal power circuit.

READ MORE
 
Wiring Fluorescent Fixtures, Equipment Grounding Conductors, and Service
by Staff |

CODE CITATIONS: Article 225-Outside Branch Circuits and Feeders; Article 230-Services; Article 250-Grounding; Article 400-Flexible Cords and Cables; Article 410-Lighting Fixtures, Lampholders, Lamps, and Receptacles; Article 422-Appliances. Wiring Fluorescent Fixtures

READ MORE

Pages