Hi All,I know we have some HV and utility guys here so I thought I would ask. I was doing a PM today on some equipment (unrelated), when I took a look at a G&W 4 POSITION SWITCH. 2300v. I noticed the cables in the 4" conduit. They are terminated and bonds are all made up and bonded to the G&W cabinet. Fine. My question is: should the the conduits be bonded to the cab aswell? Now the cables just come out of the pipe with no fittings.I thought it strange/odd there was no bond to the conduits.
Hi Lee, There might need to be some testing done before the work was completed. Likes of a Hi-Pot test or what-ever. The reason the terminations are made like that before all the mechanical stuff is finished is pure economics, maybe the test technician could only be at that site at that time. Sure, we would all like to have things finished, I've tested work in sub-stations here where the engineering part has not been completed, but is safe. Commissioning HV gear is in itself a long slow process.
Basicaly behind the sheet metal cover, all the boots are made up and the sheilds terminated and bonded to the frame. However the conduits are not bonded to the frame (just filled with sealant to keep the water from man holes out). I would think they should be.