In article , Ted Edwards says...

If it really is split 240 and not two lines of a three phase service,
looking at only one hot from ground should have very little error in
phase.

This is probably true, from the standpoint of
determining phase angle between voltage and current.
The phase of the L1 to common should look pretty
much the same as L1 to L2. Of course he would
have to use the correct voltage when figuring
I x V x cos(angle).

Jim

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