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Insulation of wires from computer power supplies

Discussion in 'Electronic Design' started by Ignoramus12063, Jan 18, 2006.

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  1. There are numerous wires coming out of 12V computer power supplies. I
    would like to know if their insulation is adequate for 115VAC
    connections. Does anyone know if they are required to conform to any
    standard? They are nice because tere are many different colors
    available in any bundle.

    i

    --
     
  2. linnix

    linnix Guest

    Yes, they are rated for the corresponding voltages, usually, 12V,5V and
    3.3V.
    Just have your local fire department in stand-by. Don't expect any UL
    approval either.
     
  3. kell

    kell Guest

    I'd only use thinly insulated wires like that inside an enclosure,
    not for external power lines.
    I'm sure the insulation would withstand 115 volts, but it doesn't
    have much strength and would be easy to break or strip
    if it gets yanked on or rubs against the edge of something.
     
  4. I looked closely at some wires that I chopped off the 12v power supplies that
    were being thrown away at work.

    The wires are actually rated for 300 volts.

    Case closed, as far as 115V is concerned. I will use them for various
    projects, I really like having multicolored wire.

    i


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  5. So, the point of your post was?
     
  6. Tim Williams

    Tim Williams Guest

    That he's too cheapass to buy it. ;-)

    Tim
     
  7. Hint. 300V_what_. A wire rated for 300VDC, is _just_ safe for 115VAC. The
    normal conversion factor, is 2.25*. However you also need to know whether
    this voltage is the 'rated working' voltage, or the 'proof/test' voltage.
    If you realise that 'mains', can have some significant transients, this
    wire may be very close to it's maximum rating, and above it's design
    working voltage...

    Yes.

    Best Wishes
     
  8. Dmitri

    Dmitri Guest

    So, what is wrong with getting good functioning parts, such as these
    colored jumpers, for free if all you need to do is to pull out your snips?

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    http://www.cabling-design.com
    Cabling Forum, color codes, pinouts and other useful resources for
    premises cabling users and pros
    http://www.cabling-design.com/homecabling
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  9. Ian Stirling

    Ian Stirling Guest

    No, they aren't.
    It's not practical to make a wire with 3.3V insulation, with any common
    insulating material - insulation which breaks down at (say) 10v would be
    a very, very thin varnish, and certainly unsafe around the sharp metal
    corners inside PCs.
     
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