Underground feeder

[sportzcoach]

I am running URD approximate 250 feet direct bury. feeding 200 amp service on house. what size Al URD do I need?

 

[ron]

If no adjustment or correction factors are required, use Table 310.12 (NEC 2020).

 

[infinity]

I am running URD approximate 250 feet direct bury. feeding 200 amp service on house. what size Al URD do I need?

Are you asking about voltage drop compensation? What is your current? Using the Southwire app with 150 amps I come up with 300 kcmil Al. Using the section Ron posted the minimum size would be #4/0.