/diy/ - Do It Yourself

>>2550788
One is ground in from your panel. One is ground out to your pump.

Black is hot. White is also hot but the other sidenofnthe split phase. They're both 120v to ground and 240 to each other

>>2550787
If you're in the US this means you have a 240v pump, which wouldn't be strange at all. You get 240v in the US because each side is 120v to ground from opposite directions.

Metal chassis need to be grounded but shouldn't be used as a source of ground, so yes you need to keep the ground wires there. Newest NEC even says the ground conductor needs to be spliced to the next grounding conductor. The screw on the chassis should be fed by a third conductor from the grounding splice