I am trying to work out how to wire up this A/C motor. There are three wires and one of the wires (Wire 1) has a marking (Z2). Two of the wires have terminals (wire 1 & 2) and the third wire has been cut. Wire 2 also has a jumper wire which has also been cut.
After having looked at other fan wiring diagrams I see a lot of them refer to a capacitor but I am unsure whether this motor needs a capacitor and if it does what type and size of capacitor and where would it be wired with this motor.
My initial thoughts were that maybe there was a capacitor that went between the cut wires but without any markings or wiring diagram I am at a loss.
Best Answer
Because there are only two wires with terminals at the end I am assuming it is single phase. If this is the cause, it doesn't matter how you hook up which wire goes to positive and which goes to ground. It will work fine either way.
If this is a 3 phase motor (I don't think it is) you can tell which phase is which by the amount of resistance between the wires.
As far as the capacitor you usually see on motors, that is to help with in rush current. The capacitor can be charged before hand and when the motor is starting the capacitor can help supply current so the motor doesn't draw as much current on start up.