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Thread: Ground to Negative???

  1. #1
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    Ground to Negative???

    I've read two seperate things and am unsure whats right.

    Some people say you should connect the ground to the car chassi.
    Others say the ground should connect to the Battery Negative terminal.

    Basically I have an amp which has +12v, and a Ground. Additionally I also have an inverter which has + and - points.

    I assume the ground and negitive points of both devices are the same thing just called different things.

    I so then: What and where do I connect the negitive terminal of the inverter and the ground wire from the amp???


  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    Either will work.
    The idea behind grounding to chassis is creating a shorter ground path, which is easier to connect/disconnect, and involves less physical wire.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  3. #3
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    just what I wanted to hear, thanks...

    Why some devices refer to ground as negative, or negative as ground, I dont know...!

  4. #4
    FLAC sdashiki's Avatar
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    negative isnt always ground. AFAIK...

    we do have 3 prong plugs in our houses?
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  5. #5
    Maximum Bitrate david69leonard's Avatar
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    Quote Originally Posted by sdashiki View Post
    negative isnt always ground. AFAIK...

    we do have 3 prong plugs in our houses?
    The current in your house is alternating + and - that is the reason you use a third wire for the ground, for the purpose of preventing the item from getting fried due to an electrical surge from things such as lightning... Your vehical uses a direct curent, one wire will always be + and the other will always be -, the reason you "ground" your negative to the car chasis is due to the fact that the chasis is used for the negative in the cars electrical system...

  6. #6
    FLAC sdashiki's Avatar
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    Duh, im stoopid, didnt even contemplate the AC/DC differences.
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  7. #7
    Maximum Bitrate david69leonard's Avatar
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    Quote Originally Posted by sdashiki View Post
    Duh, im stoopid, didnt even contemplate the AC/DC differences.
    Dont be so hard on yourself man....

  8. #8
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    The reason some people will ground to the negative battery terminal is that on average, the chassis of your car is only equivilant to about a 4 gua wire.

    That and grounding to the battery eliminates the possibility of ground loops.

    If you do ground to the chassis of the car be sure to follow proper procedure. Keep the ground as short as possible and be sure to scrape away any and all paint. Ground to bare metal and for petes sake, don't just use a metal screw for this. Use a nut and bolt.
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  9. #9
    FLAC evandude's Avatar
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    Quote Originally Posted by RedGTiVR6 View Post
    The reason some people will ground to the positive battery terminal
    Positive?
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
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  10. #10
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    Quote Originally Posted by ijwalla View Post
    I've read two seperate things and am unsure whats right.

    Some people say you should connect the ground to the car chassi.
    Others say the ground should connect to the Battery Negative terminal.

    Basically I have an amp which has +12v, and a Ground. Additionally I also have an inverter which has + and - points.

    I assume the ground and negitive points of both devices are the same thing just called different things.

    I so then: What and where do I connect the negitive terminal of the inverter and the ground wire from the amp???

    To confused you even more. In other place in the world, it also called Earth.

    Ground, Negative, Earth are all the same thing (well for DC, it is.)
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