Alan,

If they were in phase with the same amplitude, there would be no 
potential difference between them.

Dave

alan smith wrote:

>But...for a residential service, are both legs on the
>same phase? Or out of phase?  
>
>If out of phase, yes I do agree....return currents
>will be out of phase as well and no issues on the size
>of the neutral.
>
>IF in phase...there is the issue.
>
>  
>


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