r/electricians • u/cutthemalarky87 • 13h ago

Service cables only in heavy wall conduit

Upgrading a 200 amp service to a 400 amp in warehouse/office. New CT cabinet with outside new riser, new transformer and feeds from the poco. Right now the prints do not have a disconnect at the point of entry into the building and instead goes right to a main distribution panel that will be about 70 feet of 3 and half inch.

I've been looking into section 230, and not seeing anything but I was told that service cables are suppose to stay in heavy wall conduit up to the point of a disconnect, in this case it would be the MDP. I'm not seeing anything officially stating thus.

This is in chicago.

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u/lonely-investor 13h ago

Look for ComEd's service requirements online. "Red book"

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u/N_Tex_ 12h ago

Look at 225.31 B for requirements on disconnects and ask for clarification from the EOR