3HP motors can typically be wired for 120 OR 240. There should be a wire diagram on the motor or under a small cover.
Square D calculator:
Square D Calculator
You need to have some sort of disconnect. Either a plain jane outlet wired for 240, an AC pullout disconect or a throw switch disconnect. Leviton (?) makes 30 amp 2 pole switches. Big box home improvement stores also sell switch disconnects for 3HP motors.
FYI - wiring up motors is one of the few things that isn't "logical" at 1st blush. Really need to follow NEC guidelines for a direct wire motor.
it is stated on the outside compressor shroud/cover that is 6.5hp, which is obviously craftsman HP rating
the motor itself states 15a, but leaves the h.p. spot blank for some reason.
i assumed a 3 or 4hp motor could be wired for either 120v or 240v, but the reason i am asking, is that the motor only states 240v, no 120v option, and has no diagrams for wiring. all i have is the 3 wires coming off the compressor in a corrugated metal tube flex conduit.
if i post pics, would it be possible to tell if its wired for 120v by the previous owners? i have now ay of contacting them, so i cant simply call and ask. i did not see the breaker at the former location to see if it was a double or not.
from what it looks like without tearing into the motor, it looks like someone may have been in their before. but i cant say for sure. the windings look like a 2 year old wound them though, i will say that
the compressor and motor are both functioning. i ran it though it paces at before i removed it from the former location. didnt think to check the voltage or breaker and see what was up until i got back home with it.
