I am installing the electric in my new house (in Ohio) and need some advice.
The main service is 320/400 amps (single phase), per power company based on Sq ft, and geothermal heating / toaster back up…
I have two 200 apm fused panels next to the meter box which I am using as the main panels, so that I can locate my “sub” panels through out the house (one on each floor).
By doing this, I understand I will need a HHNG set up for the subs back to the main.
What type of wire do I need to use? Can I run THHN 2/0 STR cu, individually without a conduit (through floor I-joists)?
If not, what kind of cable will work? :neutral:
PS, I understand Ohio is not following the new 2008 NEC.
I’m going to have an electrician check everything out, but I’m just trying to do as much of it as is possible.