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

    Mar 4, 2008, 10:06 AM
    Can the CB in a subpanel exceed the ampacity of the CB in the Main Disconnect?
    Can the main breaker in a sub panel exceed the ampacity of main breaker in the primary disconnect?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Mar 4, 2008, 01:52 PM
    Yes. The main breaker in a sub-panel is merely acting as a disconnect. It's rating can be whatever you want since the breaker in the main panel is protecting the feeder.
    Washington1's Avatar
    Washington1 Posts: 798, Reputation: 36
    Senior Member
    		  
    #3

    Mar 4, 2008, 09:15 PM
    Not that I'm asking, but I'm sure someone is :)

    Here it goes: So does this mean I can protect my 100A non-service rated panel in my detached garage, using a 60A breaker at my service rated panel?

    :)
    Simply asking a question you already answered :)
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #4

    Mar 5, 2008, 04:18 AM
    Quote Originally Posted by Washington1
    Here it goes: So does this mean I can protect my 100A non-service rated panel in my detached garage, using a 60A breaker at my service rated panel?
    Yes, that is exactly what it means.
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