A three phase motor will usually have three contacts and a ground. Hopefully the ground is distinguished somehow. The ground will have no resistance to the motor frame.
Delta is dangerous, it has a 'hot' leg, 220 volts to ground. The other two have 110 volts to ground (or 115 or 120). You can hook up any of the three power wires to any of the three motor wires. If the motor spins the wrong way, reverse any two, it doesn't matter which ones.
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