You are probably dealing (95%) with a 220 Volt circuit.
Please be extremely careful.
Is that 120 Volts from each wire to ground?
Did you check between the white and both blacks, and between both blacks? I'll bet you find 220.
Please be extremely careful.
Is that 120 Volts from each wire to ground?
Did you check between the white and both blacks, and between both blacks? I'll bet you find 220.