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. 

Some photovoltaic (PV) inverter manufacturers have designed and built transformer-less inverters to add to their existing line of transformer-type inverters for installation in the United States. Transformer-less inverters have been popular in Europe for quite some time.

Article 430 of the National Electrical Code (NEC) covers motors, motor branch-circuit and feeder conductors, motor branch-circuit and feeder protection, motor-overload protection, motor-control circuits, motor controllers, and motor-control centers.

During a recent National Electrical Code (NEC) training program, inquiries about ground-fault protection of equipment (GFPE) were raised.

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.
 Pull-through angle connectors?


More on Codes & Standards

 
Air Conditioner Requirements, Toggle Switches and More

CODE CITATIONS Article 90 Introduction Article 110 Requirements for Electrical Installations Article 250 Grounding Article 404 Switches Article 430 Motors, Motor Circuits and Controllers Article 440 Air Conditioning and Refrigerating Equipment Routing grounding electrode conductor Q: We have to inst

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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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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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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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