patricknola
Electrical contractor/Generac Dealer
- Location
- new orleans, La, United States
- Occupation
- Electrical contractor.
Hey Guys, I'm installing a service for a customer and it's going to be a 120/240 volt 200 amp service with 3/0 wire( 2 hots and one neutral). The customer wants's the underground to be 3 inch schedule 80 so if he ever wants to upgrade he can do so. I am under the impression from the code book that if he wanted to go from 200 to 400 amps I could just pull another 2 hots and a neutral to the service head. so that would be four hots and 2 neutrals in parallel all in the same 3 inch. A friend at work told me I cannot do this according to code but I am having trouble finding the appropriate nec article. Any advice?