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

    Jun 1, 2009, 02:55 PM
    Types of Double Pole Breakers?
    I just installed an appliance that called for a 240v 20amp service. I ran the line and attached a double pole 20 amp breaker (It had two separate throws). The appliance would not work. I installed another 20 amp breaker with a common trip and it runs fine.

    What is the difference?

    I have a Cutler-Hammer BR series box. Both breakers where 20amp double pole breaker for the BR series. What's the deal?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Jun 1, 2009, 03:03 PM
    The first one you tried was NOT a double-pole breaker. It was a twin, or tandem, breaker.
    A twin breaker connects to the same single buss in the panel so you were only getting 120v to the appliance.
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