Ground Fault Protection

[Sajid khan]

Article 517.17 Require Ground fault protection on a breaker rating greater than 1000A.
May i know what can be the consequences if ground fault is not used??

Thanks


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[winnie]

With services of that size, sustained arcing ground faults are possible. This means that an arc forms from phase to ground, but the current flow is low enough that ocpd doesn't trip.

So a fault can turn the electrical system into an arc furnace which consumes itself and everything around it......

Jon

 

[Mdsparky]

Article 517.17 Require Ground fault protection on a breaker rating greater than 1000A.
May i know what can be the consequences if ground fault is not used??

Thanks


Sent from my iPhone using Tapatalk

Requirements For GFPE

During a recent National Electrical Code (NEC) training program, inquiries about ground-fault protection of equipment (GFPE) were raised. Two questions were: Why is ground-fault protection required for large equipment rated at 1,000 volts (V) or less, and what are the requirements for GFPE when...

www.ecmag.com

 

[tom baker]

At 120 volts there is not enough energy to sustain an arcing fault. A 277 arcing fault will not extinguish. Somewhere I have a picture of MRS that was melted from a arcing fault.

 

[LarryFine]

It does the same thing a GFCI does that a breaker can't, except for equipment instead of people.