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

    Apr 9, 2011, 10:44 PM
    What is difrence between 120 volt rated breaker and 220volt?
    Can we use 400/230 volt rated breaker in 208/120 v system?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
    		  
    #2

    Apr 10, 2011, 04:12 AM
    Yes, I can always use equipment rated at higher voltages for lower voltage, but not the other way around, such as a 240 volt breaker cannot be used on 480 volts.

    Another value to consider is the AIC rating, be sure the rating is higher than needed. This should not be an issue, as 480 volt systems are higher AIC than 208 volt systems, but does need to be checked.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    Apr 10, 2011, 08:45 AM

    A 277/480v breaker will not physically fit in a 120/208v panel.


    What is a "400/230" breaker?
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