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Thread: class 2 definition

  1. #1
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    Apr 2003
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    class 2 definition

    What is considered a class 2 rating?

  2. #2
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    Re: class 2 definition

    I don't have my book handy, but what I recall is "less than 30 volts, less than 1000 VA."
    Charles E. Beck, P.E., Seattle
    Comments based on 2014 NEC unless otherwise noted.

  3. #3
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    Re: class 2 definition

    Code:
    Class 2 Circuit. The portion of the wiring system between the load side of a Class 2 power source and the connected equipment. 
     Due to its power limitations, a Class 2 circuit considers safety from a fire initiation standpoint and provides acceptable protection from electric shock.
    [ September 02, 2004, 04:13 PM: Message edited by: don_resqcapt19 ]
    Jim
    New Hampshire

  4. #4
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    Re: class 2 definition

    I remember seeing that definition, but it did not help me understand. It defines “class 2 circuit” by presuming you already know what a “class 2 power source” is. All they need to add in the 2005 version is a definition of a “class 2 power source” as “a source that supplies a class 2 circuit,” and the circular definition will be complete.
    Charles E. Beck, P.E., Seattle
    Comments based on 2014 NEC unless otherwise noted.

  5. #5
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    Re: class 2 definition

    Originally posted by charlie b:
    I remember seeing that definition, but it did not help me understand. It defines “class 2 circuit” by presuming you already know what a “class 2 power source” is. All they need to add in the 2005 version is a definition of a “class 2 power source” as “a source that supplies a class 2 circuit,” and the circular definition will be complete.

  6. #6
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    Apr 2003
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    Re: class 2 definition

    Thanks for your help, but I have another quick question for you. Is class 2 a UL or NEC standard?

  7. #7
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    3,552

    Re: class 2 definition

    Take a look at 725.41(A).
    A class 2 circuit is defined by it's source, which has to be a listed product.

    A class 2 'rating' is defined by the UL listing.

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