Residential 2 Meter stack - Sizing SE conductors?

[ecook]

Hello, I am new here. Former union journeyman turned licensed NJ Contractor due to lack of work. Thank you in advance for any of your help.
Scenario:
Installing a new single phase 2-family dwelling service. Power Co. wants a 2 meter stack and their Service Drop will be 1/0. Panels are 200A in each unit. Power co said they prefer 1 set of SE conductors to their drop.
Question:
Should i size my 1 set of SE conductors by just using the total calculated load for both units? If not, any recommendations? I'm used to doing single family and I dont want to undersize them.. Thanks for your help.

 

[fireryan]

Go to annex D in the code book and you can do a multi family load calculation.

Welcome to the Forum

 

[infinity]

As fireryan said you would need to do a load calculation to determine the size of the SE conductors or just use conductors rated for 400 amps.

 

[ecook]

Ok thanks it makes sense to use the calculated loads to size the SE cable on this new modular duplex instead of sizing by allowable amps here because it's pre-wired with 2-200 amp panels..

Installed panels: 400A = 400 mcm or parallel 2/0 (2 conduits)
vs.
Calc load: 160 amps (80 amps/unit) = copper 2/0 or even 4/0 to be safe.

Sounds like huge overkill to go with the 400 amps. It's only 3000 sq ft total. Ranges, dryers and HWHs are gas. I will confirm with local inspector.