Hot Tubs: How do know which wire is high speed and which Mar 13, 2018The two other answers are correct but I would like to add my two cents. The Green wire is always Ground and the white wire is always Common (ether neutral on a 110vt motor or the 110volt leg of a 220volt motor). The pump is activated by either the.. Related searches for 2 speed pump wiring diagram 2 speed starter wiring diagramtwo speed motor wiring diagram2 speed motor starter wiring diagram3 phase 2 speed motor wiring diagram2 speed electric motor wiringwiring two speed motortwo speed fan motors wiringwater pump wiring diagram