Conductors don't cross the border. They supply power to the toll booths, shop and security building on the Canadian side. The bridge spans the border, has lights etc on it but the wires I'm dealing with are the main service wires.
Wires to first disconnect are 3 x 350MCM R90 copper ran underground to a 400amp fused disconnect. (3" rigid stubs up and comes in the building above ground and you can see 3" conduit going up a near by pole)
From there 6 x 4/0 R 90 copper conductors in a rigid 3" underground a short distance to main 400amp distribution panel. Was origionally fused at 300amps, they want more. Actually one fuse was 300amps and the other was 330amps?
