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

    Nov 29, 2009, 08:33 PM
    How to tell a 220v line
    How can I tell if an electrical line going from an outside subpnel/breaker box to an outdoor spa blower is a 120v 0r 220v line?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
    Ultra Member
    		  
    #2

    Nov 29, 2009, 08:35 PM

    The best way is to use a voltmeter to test the voltage between the contacts. There are also color codes. If it was wired correctly, the neutral should be white. That is an indication that the circuit would be a 110 V circuit. If both conductors are non-white (Black, Blue, or Red, for example), it's an indication of a 220V line.
    ohb0b's Avatar
    ohb0b Posts: 215, Reputation: 14
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    #3

    Nov 30, 2009, 12:56 AM
    You can also look in the panelboard and see if the line is fed by a two pole breaker.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #4

    Nov 30, 2009, 05:54 AM
    Quote Originally Posted by davekuzo View Post
    how can i tell if an electrical line going from an outside subpnel/breaker box to an outdoor spa blower is a 120v 0r 220v line?
    A tester is the ONLY way.
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