My thought - as long as the water pipe is reasonably well grounded, you should
have no need for a GFI or AFI. Plastic pipe doesn't count.
Donald.
Matt wrote:
> I am wiring a bathroom for my shop and am installing a tankless water heater
> that uses 55A. I already have a 60 amp type QP breaker and a buddy suggested
> that I may want to consider a GFCI breaker. It really hadn't occurred to me
> but since it is basically pumping heat right into the water, maybe a GFI or
> even an AFI would be the way to go. BIg cost difference, but safety is
> important. Would there be a failure mode that a FI breaker would be better
> than a standard breaker?
> I would appreciate your thoughts!
> Matt in GA
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