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I bought a new Aquatec 220 psi pump model#58-ELK-220 voltage 115 VAC current 16 amps max and has a pressure switch attached. I would like to attach the pump to a 15-Amp 125-Volt 3-Wire Plug ( http://www.lowes.com/pd/Hubbell-15-A...e-Plug/3739251 ). I have 3 loose wires on the pump 2 black and 1 green/yellow. The green/yellow is in the back of the pump. 1 of the black wires comes from the pressure switch and the other comes out of the back of the pump. Another black wire also comes out of the back of the pump and runs to and is connected to the pressure switch in front. Do I attach all 3 loose wires to the 3 wire plug? Which wire is the ground? Please searched everywhere on the internet for the answer to this question and haven't found a thing.