Conduit Riser Clearance
Conduit Riser Clearance
(OP)
In a substation, what would be the minimum height above grade required for the top of the conduit risers on 25kV feeder exits? I know the minimum clearance above grade is 10' at 25kV, but I was wondering if there were any rules governing the minimum height of the conduit.






RE: Conduit Riser Clearance
"Above grade" isn't really the rule. Since the height is for personnel protection, take your measurements from any handy standing surface, such as foundations.