what is the lettering for triplex or as its called out here in the west coast "URD"?
a contractor(general)has poured the foundation for a house and ran 2 1/2" pvc under his garage slab and up into a interior wall in the garage (remote meter)
well now the home owner wants electric heat and electric insta heaters for tub and kitchen, which the original 200 amp service wont handle (has a comp with a high locked rotor current) and now they want to bump up to a 400 amp servic(320 amp meter no doughnuts or ct can)but problem being one 2 1/2" pipe.
will the 4/0x4/0x2/0 pair fit? not that it will be an easy pull mind you. i dont like what he is suggesting and depending on actual lettering of triplex will determine if it is even legal. when i tried to suggest putting service on exterior wall he just about blew a gasket. another problem is running though one panel to get to another ive never done this and wonder if a gutter below both panels will be required?

thanks,
h20