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. 

Before we proceed, in part 3 of this series, the change in Section 230.70(A)(4) dealing with service disconnects on one- and two-family dwellings was reversed during the late stages of the development process and never made it into the 2017 National Electrical Code (NEC).

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 2017 NEC.
 White conductors 
in cable assemblies


For many years, the mystery of area classification has resided with a select group of experts within the electrical, petrochemical and industrial sectors. Many electricians, electrical engineers, fire inspectors and electrical inspectors have remained outside of this group.

In the 2017 National Electrical code (NEC), there are a few changes in 110.26. The first change is in subsection (A), which is part of a global change for the upper voltage threshold.

More on Codes & Standards

 
Box-Fill Calculations, Part VII

314.16(B) Box-Fill Calculations The National Electrical Code contains provisions for the maximum numbers and sizes of conductors that can be installed in boxes and conduit bodies.


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GFCI Requirements Expand in 2005 NEC

Ground-fault circuit interrupter (GFCI) protection for personnel or a similar protection technique has been in the National Electrical Code (NEC) since 1962 with specific reference to GFCI and its definition found in the 1968 NEC.


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Grounding Electrode Conductors in a Building

Grounding electrodes are required to be installed and connected to electrical services and to some feeders or branch circuits in separate buildings remotely located from the service.


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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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