My company recently purchased another company and we are in the process of moving some equipment from one of their plants to ours. When I went to the new plant, the first order of business was to disconnect the electrical supply from a machine. When I was doing the live dead live test to ensure I was locking out the proper breaker, I noticed that the L-L voltage was around 498-499 and the L-G was 288-289. I have never seen voltages that high at equipment. Is that typical in some places or just a fluke?