National Electrical Installation Standards (NEIS)

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Featured Standards

NECA 111-2017, Standard for Installing Nonmetallic Raceways (RNC,ENT, LFNC) (ANSI)

Describes installation procedures for nonmetallic raceways of circular cross-section used for electrical power wire and cable, communications wiring, or fiber optic cables.

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NECA 305-2018, Standard for Installing Fire Alarm System Job Practices

This Standard describes practices for Installing, testing, and maintaining fire alarm systems. These job practices represent a minimum level of quality for fire alarm system installations.

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Code Question of the Day

Wednesday, August 21, 2019
CQD: 8/21/2019

I need to understand how the main breaker (in this case 1200A) can support by code feeders of 400A, 800A, & 1000A. The question my customer posed to me was how does the main of 800A support what appears to be a total of (400 + 800 + 1000A) 2200A. I understand the breakers are sized to protect the conductor size but I find limited information on how the 1200A main can support the 2200A feeder loads.
Rick Gardner
Tuesday, August 20, 2019
CQD: 8/20/2019
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