![]() Each transformer has a center tapped secondary coil and one of them can be connected to the neutral. Yes there are hybreds particularily where the delta is formed using 3 single 120/240 volt single phase transformers. Most are 3 wire and do not extend any neutral connection. i never owned an all electric coach so I don't know if any of those have any 240 volt applications.Ī 240 volt 3 phase servicce is intended to supply 3 phase load only. All I really want is enough juice to run a small space heater so I don't have any freezing problems in the relatively mild Eugene Oregon winters.ĭon, I so can't handle 3 phase vector math that I don't even know what it is! Am I looking for trouble here?Īquahot does upply a 240 volt electric heat element in one of it's larger models. A 30 amp connection would suit my purposes as well. From ground (obvious because it was tied to the metal box) the other 3 legs read 110, 110 and 190? My logic says to use the two 110 legs and ground but, my logic has gotten me in a lot of trouble in the past. I finally got around to checking the voltage in the compressor house where I intend to install my outlet. Everything that an electrician does must conform to the electrical code.Īs usual, the knowledge in this group and willingness to help out is amazing. The thought about using a licensed electrician is certainly not a bad idea I am a Power Engineer not an electrician. Most space heaters are 1500 watt and draw from 12 to 15 amps depending on the actual voltage. I also agree with someone's comment about the additional load on the wiring that may not be adequate. BTW what is the voltage specified on the pump label. In my opinion it would be a lot simpler than using the 2 phases. If you extend this as a 30 amp service to the coach it has to be the phase, the neutral and the ground. In any case you can not use the ground in place of the neutral. I don't see why you would need both phases if all you need is 120 volts. The normal 30 amp service in RV parks is a 120 volt service not a 240/120 volt service. ![]() Why did you not measure the phase to neutral voltage? You said it was a 3 phase 4 wire feed to the pump. I'm not being picky as there could be a difference in this case especially since I am not hearing what the voltage is to the neutral. You did not however say what the phase to phase voltage was at the same time. You said 110 from each phase to the metal case that appears to be grounded. This is no time to be casual about actual voltages. ![]() That is not the case in a single phase 240/120 volt service where there in no phase angle involved. If you extend 2 of the 3 phase legs then the voltage between each will be 240 volts but also they will be out of phase with each other by 120 degrees. Not knowing all of the details here, I am forced to answer your question with a yes you may be asking for trouble. ![]()
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