Electricity? Never touch the stuff
I'm hiring an electrician to run a 50 amp line at my daughter's house for my RV. I only need 50amps because I have two A/C units. It's a 30' toy hauler. No W/D hookups. Everything is 110 (I believe). ...
Forum Discussion
Dutch_12078 wrote:Good answer.philh wrote:
Two questions,
1. I've heard of some wiring the same 120V phase to both sides. Wouldn't this drive twice as much current through neutral line?
2. Other than the problem of hooking to a single phase circuit, why wouldn't the AC units be 2 phase? Wouldn't that be much more energy efficient?
Yes, if a single 120 volt service is wired to both L1 and L2, the neutral carries the total load from both hot legs. Assuming a standard 50 amp single breaker though, the total load cannot exceed 50 amps.
Standard residential/RV 120/240 volt service is not "2 phase", it's a single "split-phase" service.
You may have read about using a cheater cord - ie one version has 2 male 30A plugs and a female 50A plug (ie 30/30/50). So yes this device can draw 60A on the 50A neutral. Not excessive but still over current. But what about the 30A neutrals that are now connected/shorted together? The current on the 30A neutrals is now determined by the impedance of each 30A neutral. As a result one 30A neutral could be carrying 50A and the other 10A resulting in significant overload of the one neutral.
The 20/30/50 cheater cord has the same problem.
