> I understand the center tap output with my choices for +12, -12  or 24
> VAC, Am thinking for 220 VAC, I want to connect the center red and black
> together, and the outer red and black go to the 220 VAC. For 110 volt,
> do I connect the reds together to say the hot 110, and the blacks
> together to the neutral 110?

Yes, that's right. For 240VAC, connect the two primaries in series. For
120VAC, connect the two primaries in parallel. This is equivalent to a
single primary with double the wire size (cross-sectional area).

Harold

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