I am powering a control circuit and several pieces of equipment (AC unit, DC power supply, etc.) via 240VAC, 1-phase stepped down from 415VAC 3-phase via a transformer. The equipment will be operated in Germany. I have one leg of the secondary grounded, which I understand can then be referred to as neutral, and the other leg hot (240VAC).
My question is; when is it appropriate to leave both legs hot (240VAC) and when should one leg be grounded? Is there a rule for this?
My question is; when is it appropriate to leave both legs hot (240VAC) and when should one leg be grounded? Is there a rule for this?