http://www.foxelectricsupply.com/con...ductNo=IG1240R
An info sheet.
Ozzie, it goes on your main, if 30 amp, just one breaker; because it has only one 120volt line, on the 50 amps, or your home, on the main again, only then you will have two lines coming in; 120v + 120v= 220v.