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From: (Joshua)

How do I wire up a 480v Single Phase circuit? I'm familiar with 480V
3P but not single. The machine has a preinstalled 3-wire cord, one of
which is a ground so I'd only be using twom wires.

Also what exactly does poles mean? Like a circuit breaker is either
1-2-3 poles, is that the same as phase? Thanks.

"Single phase" 480 is just like single phase 240 residential service, only at a
higher voltage. It's called single phase because the voltage is derived from a
center tapped transformer fed from one single primary.

I've never seen a single phase 480v service. 480 is commercial/industrial in
nature and it's generally supplied as 3 phases.