( C ) phase is 240 V. to ground

[ActionDave]

150423-1300 EDT

ggunn:

What other thread?

In post 15 here I provided a possible way to get his measurements. Was this suggested in the other thread?

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This one http://forums.mikeholt.com/showthread.php?t=168856

 

[kwired]

150423-1055 EDT

kwired:

I was just looking for a possible way to explain his readings. With two more measurements of voltage we may be able to determine what the source looks like. What transformers are on the pole would be useful to know and how they are wired.

He noted that there was a tag indicating 240 V. Also I assume he is using a meter with reasonably good accuracy.

Another possibility is a single phase system with one leg 240 to neutral plus the center tapped 120-0-120 secondary.

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I agree we need more info from OP, but I also think unless this is a new transformer bank or something recently re-worked in some way and a mistake was made or if something has failed or is malfunctioning that it likely is supposed to be a typical 120/240 with high leg system.

So as in the other thread we need all line to line voltages as well as all line to neutral voltages, and information on what was used to measure voltage. Pictures of transformer bank if possible could help some as well.