Yes, I used 12 gauge...the breaker is double posted...but it says that its internally connected. Did I f-up?
12 gauge is good for 100% duty use at 9.33 Amps, check the charts(they will vary) for 100% duty. and max loads means for a few Milliseconds.
Any thing over 1000 watts should be 220-240 volt period as:
1. you can use smaller wire
2. Balance load on transformer, or inverter.
3. Use LESS overall VA and Watts
4. Most all power supply's will accept 120-240 just fine. Check name tag.
Never ever use a breaker/fuse that is larger that the 100% duty of the wire! The breaker/fuse should always be the weak link!
Larger wire than listed is most always cost less in the long term as less is lost from ohm loss (waste heat).
Hire a Electrician and get your loads balanced !!!