Before I go too indepth, I wanted to make sure this was the proper place to post this. I stated in my intro I am doing a co-op work experience. I am working at a sawmill, and I have been asked to look at a few situations and things like that around the mill. I have been here for a couple weeks and the one situation they gave me I am fairly confused about. This mill is 3 phase, 120/208 VAC supply. My use of terms may be wrong, as I am still getting used to everything. I can draw... or attempt to draw the circuits my supervisor gave me, but basically there is a problem with the voltage. The 120V supply goes to the one machine, and then right after the machine it is grounded and there are neutral wires as well which the current should flow through. However, instead of that happening, there was 6.7V on the ground end of the load/machine. So to fix this temporarily, there was a jumper put in place from the neutral wire to the machine ground. I am to figure out what is going on and why there is that 6.7V after the load/machine and fix it so the jumper can be taken out of place.