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.
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National Electrical Code (NEC) Article 110, “Requirements for Electrical Installations,” applies generally to all electrical installations, like all of the articles located in the first four chapters.

Safety for solar photovoltaic (PV) systems has come a long way since the first installation requirements were inserted as Article 690 into the 1984 National Electrical Code (NEC).

In the electrical industry, a new method of protecting workers from arc energy is gaining popularity: prevention through design. Simply speaking, the design and installation of equipment or systems incorporates inherent safety features that protect workers from serious arc-flash injuries or death.

More on Codes & Standards

 
Box-Fill Calculations, Part VI

ARTICLE 314 C OUTLET, DEVICE, PULL AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND MANHOLES

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Working in the Garage

The required placement of receptacles in the wall above a kitchen countertop is uncertain where an appliance garage is present. The Code requirements are the following: “210.52 Dwelling Unit Receptacle Outlets. (C) Countertops (1) Wall Counter Spaces.

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Box-Fill Calculations, Part V

ARTICLE 314 C OUTLET, DEVICE, PULL AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND MANHOLES

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Box-Fill Calculations, Part IV

ARTICLE 314 C Outlet, Device, Pull and Junction Bozes, Conduit Bodies; Fittings; and Manholes 314.16(B) Box-Fill Calculations The National Electrical Code contains requirements for the numbers and sizes of conductors that can be installed in boxes and conduit bodies.

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Grounding a Meter Socket

Consider a typical 120/240V single-phase service with a separate cast meter socket and a rigid steel conduit nipple connecting the meter socket to the service equipment enclosure.

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Grounding Connections

The basis of grounding and bonding starts at the connection of a bonding jumper or an equipment-grounding conductor to a box, an enclosure or other electrical equipment and ends at the point of connection to the service-grounded conductor in a grounded system or at the service-equipment enclosure fo

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Box Fill Calculations, Part III

Article 314: Boxes, Conduit Bodies, Fittings and Manholes 314.16(A) Box Volume Calculations Article 314 of the National Electrical Code covers the installation and use of all boxes and conduit bodies used as outlet, device, junction or pull boxes depending on their use.

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