Forum Discussion

boingram's avatar
boingram
Explorer
Apr 16, 2015

voltage

....arguing w a neighbor. ...is the voltage coming out of a shore power pole in a cg 110 or 220...
  • boingram wrote:
    ....arguing w a neighbor. ...is the voltage coming out of a shore power pole in a cg 110 or 220...
    Bottom line, it's whatever the voltmeter says it is.
  • 2oldman wrote:
    boingram wrote:
    ....arguing w a neighbor. ...is the voltage coming out of a shore power pole in a cg 110 or 220...
    Bottom line, it's whatever the voltmeter says it is.


    Or, it all depends upon which pins of the connector the voltmeter is connected to. The real answer is that the pedistal supplies 220VAC but most RVs are wired for 110VAC service only. A 220VAC 50 amp appliance could be plugged directly into the pedistal and it would work properly.
  • boingram wrote:
    ....arguing w a neighbor. ...is the voltage coming out of a shore power pole in a cg 110 or 220...


    So who won???

    You didn't clarify which one of you thought 110V :B
  • ...he did. ..but he builds houses...was an electrician. ...but i learned a lot!
  • Allworth wrote:
    For nubies, the best description of RV 50Amp service is:

    2 circuits, each 120volt; 50Amp. Combined in one service cable.


    Loose neutral and see what the RV sees!!!! Chris
  • First of all, Most, 99%, of the RV's are 120 volt, period, end of sentance! This is regardless of amperage, i.e. 20, 30, or 50 amp! 20, or 30 amp consists of a single hot 120 volt hot lead, a single neutralleg, and a ground leg. A so called 50 amp service consists of two 120 volt hot legs, each capable of handeling 50 amps, a common neutral leg, and a ground leg, 4 wires. This is identical to an electric dryer circuit, which draws 240 volts @ 50 amps. The differance with an RV is you do not use the 240 volts, you use two 50 amp 120 volt circuits.typically wired so one AC and the hot water heater and some 120 volt circuits wired to onE leg, the second AC, furnace, microwave, and the rest of the 120 circuits wired to the other. So while the pedestal is wired identicle, if you plug your dryer into it it is 240 volts, if you plug your RV into it, it is 120 volts!! Unless you are inanindustrial area, you have 240 volt service, in an industrial area you could have 3 phase 208 volts, which is a differant ball game.
  • Too funny. Ran into a neighbour camper house builder electrician guy in a provincial park probably 10 or 12 years ago. He was quite adamant about the voltage at his 30 amp connection was 220 volts (plus or minus) and that all campgrounds were like this. I told him i would bet him all the cash he had on him that it was 110 (plus or minus). Made a little pocket change that day. :)
  • When I first wired my 30 amp outlet to hook my trailer to shore power, I plugged the trailer in and blew ALL my electrical items...seems I wired the outlet for 220 instead of 120!

    Oh - did I mention that I am a master electrician? :o I booted my own butt around the entire back yard!

    Tim
  • Timay wrote:
    When I first wired my 30 amp outlet to hook my trailer to shore power, I plugged the trailer in and blew ALL my electrical items...seems I wired the outlet for 220 instead of 120!

    Oh - did I mention that I am a master electrician? :o I booted my own butt around the entire back yard!

    Tim


    :) Stuff happens...and then you move on. :)
  • Timay wrote:
    When I first wired my 30 amp outlet to hook my trailer to shore power, I plugged the trailer in and blew ALL my electrical items...seems I wired the outlet for 220 instead of 120!

    Oh - did I mention that I am a master electrician? :o I booted my own butt around the entire back yard!

    Tim


    Yeah, I wouldn't feel too bad about that. Nothing else in our world uses a big plug like an RV plug, and is only 120V. We see that plug and 240V instinctively pops into our mind. It is a common mistake for experienced electricians, when their experience doesn't include RV's. Of course, verifying voltage and load should come first, but yeah, things happen.