A college campus installation starts at a utility owned pole, customer owned 7200V underground conductors run to a customer owned padmounted 7200V switch and fuse, from there 7200V conductors loop to a series of padmount transformers, each feeding a seperate building. Question: Are the 7200V underground conductors from the switch to the padmount transformers, a feeder or service conductors? Do they require an underground warning ribbon?
Joe, Table 300-50 Exception No.3 only applies to conduits & raceways that are "under a building or exterior slab" This exception waives the minimum cover requirements. My installation is not under a building or exterior slab, it is direct burial conductors not "conduits or other raceways", and mine are buried according to the minimum cover requirements. Exception #3 doesn't apply in my case.
Re: 7200 V - Feeder or Service?#79217 12/07/0110:05 PM12/07/0110:05 PM
At a telecoms facility where I worked some years ago, some outside contractors nearly put a JCB digger shovel into a buried 11kV cable.
It was only the hatched black/yellow warning tape that alerted a manager to what was about to happen. The digger crew intended to carry on through the tape (more Darwin Award candidates?) but the boss saw the tape in time to stop them.