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    collip's Avatar
    collip Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 6, 2007, 01:31 PM
    3 wire plug or 4 wire plug
    Good day.

    I have an older style electrical generator for backup power for my house. It has 2, 20 amp 120 volt, 3 prong plug ins and 1, 20 amp 240 volt , 3 prong plugin( 3 wire). I am installing a manual transfer switch in my house with a plugin located on the outside of the house. The outside plugin is a single 30amp 4 prong setup. Can I connect my 3 wire systen to this 4 wire plugin? I understand that the 4th wire is a neutral wire, What is it for?
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #2

    Nov 6, 2007, 03:40 PM
    I think your question is too technical to trust anybody's answer except tkrussell's. I am only posting to refer you to my thread https://www.askmehelpdesk.com/electr...se-123290.html
    That may have some other useful information for you.
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