clearance of service conductors and non pressurized pipes
clearance of service conductors and non pressurized pipes
(OP)
I am doing a design in arkansas. Do to limited room we are looking at putting a transformer over a non pressurized storm sewer pipe. Is there and clearance requirments for that with respect to the pipe and electrical equipment including conductors in conduit. Unfortunetly this is not my design. It is a VE proposed by the contractor and approved by the owner.






RE: clearance of service conductors and non pressurized pipes
I assume the same entity owns both the sewer line and the electrical equipment?
And I assume they've consider how they would deal with any necessary repairs to the sewer line after the transforme is installed.
I'd certainly recommend concrete encasement of the conduit in the vicinity of the sewer line and appropriate warning tape, etc.
RE: clearance of service conductors and non pressurized pipes
RE: clearance of service conductors and non pressurized pipes
Contractors and owners usually look just a little ahead of the next check they write and not much further.
RE: clearance of service conductors and non pressurized pipes
But then the NESC allows less than 12" horizontal separation when "conditions require", with requirements for "mutual agreement between all parties, and adequate vertical separation to permit access to either system without disturbing the neighboring system.
I would do it if there is no seam in the pipe under the transformer, there was substantial vertical separation, and; if it is likely the sewer pipe will need access (for what ever reasons I cannot imagine) have some structure in place to support the transformer.
RE: clearance of service conductors and non pressurized pipes