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can voltage from a dc/AC inverter be. fatal\harmful ?

Discussion in 'Electronic Basics' started by peter, May 14, 2004.

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  1. peter

    peter Guest

    Excuse my electronic ignorance. I don't plan to put an output lead on
    my tonge or anything, but i'm thinking of accidents and so on. The
    inverter has a 12 v input and 240 v output 50hz. It gives output power
    at up to 150w, and I would run a very small appliance on it using only
    < 10w. I would have it all connected professionally of course but am a
    little concerned about what would happen in the event of an unforeseen
    accident\shorting out\moisture and so on. Can anyone tell me whether
    it would give the same type of kick as 240 volt supply in the home, in
    which case I abandon my project right here!! or whether it might be
    less harmful because of the relatively low power involved??

    peter
     
  2. the Wiz

    the Wiz Guest

    It's still 240 volts and the current required to interfere with your heart is
    readily available.

    I'm in the US and regularly use a 12 volt DC to 120 volt AC inverter to test
    computer gear from my truck - just not in the rain ;-)

    Give the outlet the same respect as the one in the wall and you'll be OK.

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  3. bench

    bench Guest

    Fatal voltages are present in the spark plugs of your car,
    which is powered by a 12V battery, so I don't see any reason why
    a converter could not have a similar result.
     
  4. Don Bruder

    Don Bruder Guest

    Treated properly, it will be no more or less dangerous than the same
    voltage/amperage supplied by a wall-socket. Anything that would make the
    wall-socket dangerous will also make the inverter dangerous, and
    likewise, anything that will make the inverter dangerous would also make
    the wall socket dangerous. When you get right down to where the rubber
    meets the road, 150 watts of 240 @ 50Hz is 150 watts of 240 @ 50Hz,
    whether it comes out of a battery-powered inverter, a wall socket, a
    portable generator, or some kind of hand-cranked "black box" device.
     
  5. Soeren

    Soeren Guest

    Hi Don,

    Except there is no phase-to-earth risk if isolated from the car chassis
    (which it should be), so you would have to touch both leads (phase and
    return) to get hurt.
     
  6. L. Fiar

    L. Fiar Guest

    Absolutely... a deadly kick.
    With 150W available output, there is many times the amount of current
    needed to kill you. Forget what is actually being used and think of
    what it can deliver if it wants to - into your body.
    Regardless of the source, 240v is 240v, and it is high enough to put a
    lethal current through your body.
    150 Watts may not be enough for an electric heater, but it is far
    from "low" power. Any supply that is of use to run mains equipment will
    supply enough current to kill.

    Any moisture getting into a high voltage circuit will be a serious danger,
    not just the danger of shock, but also fire. As for short circuit problems,
    I would hope that the inverter is well protected against such events causing
    serious damage.

    Another issue is with the low voltage into the inverter. Vehicle batteries
    can deliver large amounts of current, and shorting them can be very serious
    indeed.

    Unless you really know what you are doing, I would recommend that you either
    abandon the project or get help from someone who does.
     
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