squeakapotamus
Member
- Location
- Kentucky
- Occupation
- Electrical Designer
I am specifying a new bolted pressure switch to be installed on an existing 480V, 1200A service entrance feeder. There is concern that the feeders will not reach the load side lugs on the new switch. The facility owner doesn't want to have new cables pulled because it will increase downtime. Instead, he has requested to have bus bars bolted to the load side of the switch, which will lower the lugs down toward the bottom of the enclosure. Even if everything were properly spaced, I'm concerned that there would be a conflict with the UL listing for the switch. Would I need to get the manufacturer to sign off on changing a switch? Would this qualify as a field modification that requires evaluation by UL?