Asked by: Tudor De Viña
asked in category: General Last Updated: 26th January, 2020

What does Article 250 of the NEC cover?

Article 250 covers the grounding requirements for providing a path to the earth to reduce overvoltage from lightning, and the bonding requirements for a low-impedance fault current path back to the source of the electrical supply to facilitate the opera- tion of overcurrent devices in the event of a ground fault.

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Also to know is, what is the article in the NEC that covers grounding and bonding?

The National Electrical Code (NEC) covers grounding and bonding in several articles, but the primary coverage is in Article 250. Typical commercial electrical systems are grounded systems. Within the system, some things are grounded… some things are bonded.

what is an effective ground fault current path? NEC Article 100 defines the term effective ground-fault current path as “an intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates

Also question is, are ground wires required by code?

In your home's wiring system, the grounding system is a critical safety feature. According to the National Electrical Code, or NEC, a ground system should have a grounding resistance of 25 ohms or less. Achieving this may require more than one ground rod.

Why is bonding of service entrance equipment necessary?

The basic rule is that all metallic enclosures that contain a service conductor must be bonded together. The bonding ensures that none of the equipment enclosures can become isolated electrically and become a shock hazard should a line-to-ground fault occur.

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