Hi, I'm installing a 400 amp service with a 320 amp continuous let through meter socket. The utility company ran 350 aluminum from the pole to a pedistal in my yard and told me I had to supply the lateral wire from the pedstal to my meter socket. So can I supply parallel 4/0 aluminum SER to the meter socket? I think that equalls 370 amps under the 75% collumn. Thanks for your help

Sorry, Not SER but URD wire.

I typically run 500mcm AL to the line side of a 400A residential meter socket, then parallel 4/0AL to two 200A panels.

I found it... code book 2008, pg 70-147 table 310.15(B)(6) Conductor types and sizes for 120/240 volt, 3wire, Single phase dwelling services and feeders.

Thanks for your help