I am involved with a new construction project where we are running feeders from a main substation transformer to a main bus in one of the electrical rooms. The feeder run calls for 9 runs of 1000 kcmil per phase, for a total of 27 1000 kcmil feeders run through 9 conduits with 3 feeders in each conduit.
I was told that you could not have three feeders of the same phase run in a conduit (example: having all nine A phases run through three conduits, with three A phase feeders in each conduit) and that you had to have one of each of the phases running in each of the conduits. This would mean that each of the nine conduits would one feeder from each of the phases in them. Is there a reason why each of the conduits has to have three different phases in them and cannot be all the same phase run in a conduit.
Thanks for the help