I am bringing in Five 1/0 awg wires and the same amount and size are exiting the other side. They are tied together via a 300 amp rated 4 position terminal block mounted in the junction box, and the ground is a separate single unisulated terminal block for connecting. What I need to know is the minimum size Junction box required? and also what size conduit minimum is required coming into the boz carrying the 5 wires.