Chiller nameplate calls for 2000A MOCP, we showed (5) sets of (3#600kCM, 1#250kCM Ground and 4"C) on our design to feed this chiller.
However, contractor said nameplate indicates MCA = 1,201 Amp. They propose to go with (4) sets of (3#350kCM, 1#250kCM Ground and 3"C) to save some cost and due to constraint space, it makes difficult for 4" conduits run.
It sounds okay to me since we still meet wiring size based on MCA, does anyone has any opinions or see anything wrong with this? Should we bump the wire size to #400kCM instead of #350kCM that contractor proposed...just want to go with a little larger size.
However, contractor said nameplate indicates MCA = 1,201 Amp. They propose to go with (4) sets of (3#350kCM, 1#250kCM Ground and 3"C) to save some cost and due to constraint space, it makes difficult for 4" conduits run.
It sounds okay to me since we still meet wiring size based on MCA, does anyone has any opinions or see anything wrong with this? Should we bump the wire size to #400kCM instead of #350kCM that contractor proposed...just want to go with a little larger size.