230.95 ground fault protection

[PCN]

If you have a 480v service with the main switchboard rated at 1200 amps but the main breaker is rated at 800 amps is it required to have gfi protection?
Is it the ampere rating of the equipment that drives the gfi requirement even if the main breaker is less than 1000 amps?

 

[raider1]

Here is what 230.95 says:

The rating of the service disconnect shall be considered to be the rating of the largest fuse that can be installed or the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted.

Chris

 

[jim dungar]

The rating of the busbars in the switchboard has nothing to do with the requirement for GFP.

Many inspectors agree with the concept of:
If the breaker is a 1200a frame (physical size) and it cannot be adjusted higher than 999A without replacing components, like rating plugs or sensors, GFP is not required.

 

[Pierre C Belarge]

It is based on the size of the service disconnect. Also as mentioned earlier, the highest setting of adjustable CBers as well.


230.95
Ground fault protection of equipment shall be provided fo solidly grounded wye electric services of more than 150 volts to ground but not exceeding 600 volts phase-to-phase for each SERVICE DISCONNECT rated 1000 ampers or more.