ZW-R lowest voltage?

Put a light bulb on the output and then measure.  You're probably seeing stray AC being coupled to your high impedance meter.

Need a good old Simpson 360 sometimes.

I agree with that!

Even the old Simpson was prone to stray voltage readings, just not as bad as the 10 megohm input impedance digital meters we use nowadays.

gunrunnerjohn posted:

Put a light bulb on the output and then measure.  You're probably seeing stray AC being coupled to your high impedance meter.

I did the bulb test and that was it.  My meter was doing just what you said.  All terminals with the bulb went to zero with that meter.  Out of curiosity, I unpackaged a free Harbor Freight digital meter that I picked up months ago, did some basic checks with it, then going to the transformer, without the bulb connected to each terminal, I got zero readings on all points.  Sometimes I don't know what to trust. LOL

Now I am going ahead & do the phasing to my other transformers and start hooking up lights & switches.  Now if my arthritic back was this easy to fix!

Thank you, John.

This is one of those cases where the more expensive meters sometimes don't give accurate AC readings.  They have high impedance to avoid loading even sensitive circuits, but sometimes that works against you.