Removed the faulty elements and power switch on Duke Table. Then installed new with sealant where needed. I checked operation and all the elements are working fine. There is an issue with power to the metal cabinet. The test power supply set up in the maintenance shop has no ground so when I checked from the cabinet to earth ground I have 120v with the DP power switch off. I spoke to their maintenance about checking their cords etc.. for possible issues. I ohmed out the cord on the unit but didn't find anything between connections. But there still could be any issue but only when enough voltage is applied like insulation is wearing thin on wires. The bid work is complete at this time.