"TeamCasa" wrote in message
...
Lou said:
I have a copper,10 gauge (3 wire - ground, neutral, hot) coming from a 30
amp (unused) breaker
Grizzly recommends 20 amp/220. Do I need to change
out the 30 breaker for a 20?

Lou, This sounds like a 110v Circuit. You need 220V for that saw. Change
the single pole (assumed) 30A 110V breaker with a dual pole breaker
(20A - 220V).

Whats the last water heater you saw connected to a 30a 120v line?
It has to be 240v; he just thought the 2nd hot was a neutral.
(However, it does suggest he shouldn't be doing any of this himself.)