How many cables needed for a Xfmr secondary 216Y/125 Xfmr?

[Redskinsdb21]

I know how many power cables I need based on Xfmr size and LV cable I plan to use. My question is do I need a ground and neutral? My thinking is 216 is line to line voltage but the 125 would be line to neutral so I would need a neutral and a ground. Is this correct?

 

[waross]

It depends.

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Ohm's law
Not just a good idea;
It's the LAW!