We have a 208V Three phase panel at work. It is fed through a 480 V panel with a step down transformer.

In the 208 panel I read 208 V between each phase. I read 120V to neutral on each.
When I measure each phase to ground, the center phase reads 50-70 volts! The outer ones still read 120V. What's going on?


Thanks

Okay, are you having a problem or are you questioning the voltages you are reading?

A 208 Vac, three phase is nothing more that 120 separation of phases.

You had a bad test point for that phase.

My I ask why you are checking this, and what your position is at this place?