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    azspalazzo's Avatar
    azspalazzo Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Apr 3, 2009, 11:01 PM
    Redistribution of existing 3 wire aluminum #4 50 amp line from main panel
    How do I connect an existing 3 wire aluminum #4 line from my main panel to a sub panel that I will use to supply a 40 amp electric oven and a 20 amp circuit for a microwave. Do I connect the bare wire to the ground bar or common and do I a connect the nutral bar to the ground bar. I know how I would connect a 4 wire cable(3 insulaed conductors and one bare conductor) from the main panel to the sub panel but since I want to use an exiting 50 amp 3 wire cable(2 insulated conductors and one bare conductor) I am not sure how to make the connections to the sub panel.
    Thanks for help,
    Sal
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
    		  
    #2

    Apr 4, 2009, 03:06 AM
    You won't like this answer, but what you propose is not allowed, if your located in the USA.

    A four wire feeder is required for a feeding a subpanel.

    If the panel is in a detached building , ground rods are also required.
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