I have a question about parrallel feeders. One of the electrical contractors on the job is running a 4" conduit, 300 feet to feed a 400amp 480volt, 3phase panel board. In the conduit he is pulling 9 - 4/0 THHN wires. I cant find a code that says that is legal to do. I have always been tough to run multiple conduits for paralleled feeders. Can someone please tell me where to find this in the code and if this is acceptable.
Thank you,
Robert
Thank you,
Robert