Elect system - AC

[Wilhelmus Schreurs]

Goodmorning all.

I have to correct Pete's statement of AC power

Nominal voltage is 120 volts, but voltage should be between 110 and 125. This is the same for either a single phase or 3 phase system.

220, 230 or 240 volts are basically single phase power, not 2 phases of a 3 phase system.

If you were to use 2 phases of a three phase system as in commercial or industrial uses, then you would have 3 phases of 120 volts to neutral, and between phases you would have (square root of 3 * 120volts) 1.73 * 120 volts or 208 volts.

Asothers have said, when using single phase power, you use 2 legs each of 120 volts to neutral, and they are 180 degrees apart.

Sowhen ones tries to use the two 30 amp cords, if they are on the same leg, the neutral could be loaded to 60amps.Does this matter? I donot know, others can chime in here,BUT if the two cords are routed all the way up to the panel, that is through the transfer switch, then through the30 amp breaker box, and to the main panel, then, NO, it does not matter at all, except you will only get 120 volts. I believe this is the way BB had it designed and that is why there areno 240 volt appliances in our coaches.

Having all that said,in the next couple of months, I will also be redoingmy system, and the 30 amp system will be removed. I will keep the 50 amp cord, and at the end of the cord. I use a 50 amp - 240 volt to 30 amp 120volt adapter, and even a 30 amp 120 volt to 15 amp 120 volt if I have to.

Bill 84 FC 35 SB "$quanderlodge"
Terrace, B.C. Canada