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-   -   How to convert 4 prong 240VAC to 3 prong 240 VAC. (https://www.askmehelpdesk.com/showthread.php?t=265247)

  • Sep 30, 2008, 04:40 PM
    Peter Bernat
    How to convert 4 prong 240VAC to 3 prong 240 VAC.
    My generator has a 4 prong 240 VAC outlet. I would like to convert it to the 3 prong 240 VAC house plug to connect it to the transfer panel inside the house. Of course the two live 120 VAC stay, I just do not know what to do with the ground and neutral.

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  • Dec 4, 2008, 07:34 PM
    me22469

    Put ground and neutral under same lug
  • Dec 5, 2008, 04:38 AM
    stanfortyman
    Quote:
    Originally Posted by me22469 View Post
    put ground and neutral under same lug
    NO, do not do this.


    Peter, you should NOT have a 3-prong 240v plug at your transfer panel! Who installed this?
    You MUST have a 4-wire 120/240v inlet for your transfer switch/panel.

    Can you describe the setup a bit better? How is your inlet configured?
  • Dec 5, 2008, 04:37 PM
    Peter Bernat
    Quote:
    Originally Posted by stanfortyman View Post
    NO, do not do this.


    Peter, you should NOT have a 3-prong 240v plug at your transfer panel! Who installed this?
    You MUST have a 4-wire 120/240v inlet for your transfer switch/panel.

    Can you describe the setup a bit better? How is your inlet configured?
    My friend installed it. The ground and neutral from the generator are wired together and plugged in to a 3 prong inlet. Connection on the transfer side of the panel are 120 VAC one side 120 VAC the other side and ground/neutral together connected to the ground of the transfer panel. If I change this to separate ground and neutral and connect these accordingly into the panel with appropriate size wire #6 or #8 would this be acceptable?
  • Jul 27, 2009, 02:16 PM
    maicomais

    My generator has a 4 prong circular outlet, and I want to make a extension cord that will convert that to a 3 prong outlet so I can connect my little arc welder to it. How can I do that?
  • Jul 27, 2009, 03:00 PM
    stanfortyman
    Quote:
    Originally Posted by maicomais View Post
    my generator has a 4 prong circular outlet, and i want to make a extension cord that will convert that to a 3 prong outlet so i can connect my little arc welder to it. how can i do that?
    Why not start a new thread since your question is completely unrelated to the original post, which by the way is almost a year old.

    In that new thread tell us what the input amperage is of your welder and what the amperage of the twist-lock receptacle is.

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