480x240 transformer bonding

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Bmxer883

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Location
Pa
Occupation
Industrial electrician
So quick question we recently received a new machine that was 240 single phase just two hots and a ground. We had 3 phase 480 in place for old machine so we got a 480x240 transformer.

Now my question is do we need to bond x2-x3 to ground or does it now matter because it's just a 240 machine?

I just question it cause when you check power it's 160v ground on one leg and 60v on the other and I just figured that's because there's no reference back to ground/neutral.
 
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