Would you expect the one on the left to be warmer since it had more net current in it. There wouldn't happen to be another EGC buried in those wires on the left? Can these wires simply be considered motor leads?
I'd also like to hear more about "circulating ground currents" with respect to being used on a VSD. I thought this type of problem wasn't an issue with a VSD.
Is it possible that the VFD is listed for this type of installation?
RSlater,
RSmike
