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.
 Stranded conductor terminations 


Selecting the correct size conductor is not difficult, but it involves more than selecting a conductor based solely on the ampacity shown in Table 310.15(B)(16) in the National Electrical Code (NEC).

The concept of modular data centers (MDCs) originated about six or seven years ago as a portable method of delivering information technology data center capacity without the high cost and long construction time.

Grounding electrode conductor connections are an important part of any electrical safety system. These connections ensure the path to ground through any of the grounding electrodes identified in Section 250.52(A).

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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A Change in Motor Disconnect Locations

There are many major changes in the 2002 National Electrical Code (NEC), but none will affect more installations than the change involving motor disconnect locations.

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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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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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