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.
 Previous use of gray conductors


Article 310 in the National Electrical Code (NEC) covers general requirements for conductors and their type designations, insulations, markings, mechanical strengths, ampacity ratings and uses.

A recent change in the 2014 National Electrical Code (NEC) creates a new method for determining the size of service and feeder conductors for 120/240-volt (V), single-phase services for one-family, individual units of two-family dwellings, and individual units for multifamily dwellings.

The 2014 National Electrical Code (NEC) has new requirements for field-applied hazard warning markings, signs and labels. Throughout the NEC, rules that required signs, labels and other markings also required a specific signal word be included in the sign, label or marking.

More on Codes & Standards

 
Installing Smoke Detectors (Alarms)

Smoke detectors (alarms) are installed in single-family dwellings to provide early warning of a fire. Their installation is required by building codes in many municipalities and by many fire departments.

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Article 210 - Branch Circuits

210.52(A)(2) Wall Space Receptacle placement provisions for dwelling units are stipulated in 210.52(A) through (H). Last month’s In Focus concluded with fixed and sliding panels in exterior walls.

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Installing Smoke Detectors (Alarms)

Smoke detectors (alarms) are installed in single-family dwellings to provide early warning of a fire. Their installation is required by building codes in many municipalities and by many fire departments.

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Field Marking of Arc Flash Hazards

Whenever energized electrical equipment is being examined, serviced, maintained or adjusted in any way, there is always the potential for an electrical explosion to occur, resulting in injury to the electrical worker and damage to the equipment.

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Generators, Fire Pumps, General Wiring, and More

CODE CITATIONS Article 100—Definitions Article 225—Outside Branch Circuits and Feeders Article 230—Services Article 250—Grounding Article 310—Conductors for General Wiring Article 320—Armored Cable: Type AC Article 430—Motors, Motor Circuits, and Controllers Article 445—Generators Article 518—Places

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Revisions Address Grounding Separately Derived Systems
by Staff |

There are a number of substantial changes in Article 250 of the 2002 National Electrical Code (NEC) covering grounding and bonding.

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Getting Well-grounded in Grounding Systems
by Staff |

We are often left in the air about exact meanings of grounding problems. This article simplifies the differences between the grounded and grounding conductor. The two aspects of grounding are system grounding and equipment grounding. This article concerns the former.

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