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    WILLIAM1941's Avatar
    WILLIAM1941 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 12, 2011, 06:03 PM
    Square d panels help?
    I am using a square d panel qo type. I am getting 240 volts across the two hots in but only 120 out of the 240 breakers, this happened all of a sudden, what could be wrong? I have double checked all the connections.
    John
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Nov 12, 2011, 07:30 PM
    Bad main breaker? That's about the only thing it could be.

    Did you check the voltage at the breaker buss?
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
    		  
    #3

    Nov 13, 2011, 07:35 AM
    Okay,

    You need to help us here.

    For example, when you say you get "240 across both hots", are you referring to the Main Breaker?

    If you are measuring the output of a 240 V Branch Circuit, such as a range or electric dryer, and only seeing 120 volts then you probably need to replace either one of the bus bars or the entire panel.
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