deano11178
Member
- Location
- peru indiana
Interesting dilemma i havent seen before... i have 18 conduits with 600mcm in them coming out of a duct bank and into a pull box on the side of a building. They exit out the back through a wall and into the corresponding switch boards that they feed. Pull box is sized for all the pipes and there are no splices in the box but do the wires need to be derated since there are 72- 600mcm wires going through the same box. All though it shouldnt matter the service is 3phase 480v.