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    clemen1's Avatar
    clemen1 Posts: 1, Reputation: 1
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    #1

    May 4, 2009, 06:43 PM
    Electrical panel
    Can I convert an old square d qo panel from a main lug panel to a main switch without doing a service change?
    ohb0b's Avatar
    ohb0b Posts: 215, Reputation: 14
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    #2

    May 4, 2009, 09:44 PM
    Quote Originally Posted by clemen1 View Post
    can i convert an old square d qo panel from a main lug panel to a main switch without doing a service change?
    Not sure I understand the question, but if you want to backfeed the buss through a double pole breaker and use it as a service disconnect, the answer is NO.

    1. The main breaker must be a bolt-on type, QO's are stab-on.
    2. The panel must be rated "Suitable for Service Equipment" by UL or other approved testing laboratory. (It has to have a factory installed Main Bonding Jumper)
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    May 5, 2009, 04:17 AM
    This can be done with the proper breaker retention device, but I doubt it would be available for an older panel.

    Are you sure it is a main lug panel?? I bet it is a split-buss panel.
    Is one of the two-pole breakers marked "Lighting main"?
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