Mikepier wrote:
Why do you need GFI in the first place? Is it code if you are working
on a concrete floor in a garage?

120V, 15 & 20A receptacles in a garage require GFCI protection. The 240V
one does not (but you may want to use a GFCI breaker for safety). For
purposes of shock, the concrete floor is a good ground.


The code allows 15A outlets on 20A circuits. This is very common with
120V receptacles. Not obvious to me that the intent was to include 240V
outlets, but I don't see any restriction.

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