What size conduit is Min. for 4/0 Ser cable? Is 2" sufficiant? Just from the disconnect to the Crawl Space? I guess what I am asking I have already ran 2" from Disconnect to an 2" LB 36" then a short stub to under the house. Is there enough room to get 4/0 ser in the 2"... I had origianally planned to use 2/0 copper cable but didn't realize it was special order..

Conduit Fill Chart (http://www.allenelectric.com/referencedata/conduitfill.htm)

Why are you putting cable in conduit? Why not just use the cable?

Considering this is almost 20 days old I assume it is done already.

You will not find SER in a conduit fill chart. I also doubt you will get 4/0 SER cleanly through a 2" LB.

The conduit was already run when you asked so what is the point? Is the job done?