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12v wire my battery wire burnt its self in half, what would be the cause of this... i can only think of to many watts for the wire.... im talkin about the battery to amp wire, just sayin

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  • Paul David
    Paul David Aug 03, 2008

    its very helpfull, now just one more ???? the wire is 16 g and has no fuse the amp uses 2 10fuses, if you get what im sayin

  • Paul David
    Paul David Aug 03, 2008

    its a 2000 watt pyle blue wave amp, pla2640....... would using both side of the bridge have any affect, its a new amp.

  • Paul David
    Paul David Aug 03, 2008

    ok ok, i have got it to where it wont burn my wire in half, the only thing differnt now is the ground wire onlything new, and my subs wont hit like they did before i changed the ground. would the new ground make a dif in the hit??

  • Paul David
    Paul David Aug 18, 2008

    ok, thanks for the info it was helpfull. i am having no probs now thanks

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Hello . what has happen is one of a couple of thing .? the wire could be burnt becouse of to menny amp's going throught it . becouse it's fuse is to big for the size of the wire. that you are using for your hot wire.to run your amp.!!! it work like this !!! the wire is gaged buy it's size .!!! and that determine's what size of fuse that could be used .!!! for that gage of wire.!!! in amp's.!!! that it let flow through it.!!! and a fuse is determin in it size in amp.!!' it will let flow through it the fuse. !!! and most likly you or someone has put to big of a fuse in .!!! you inline fuse holder .!!! that run's from the + hot of the battery all the way to your + side of your amp's.!!! that's mostlikly where you will find your problem.!!! check it first.!!! ok .!!! then check your amp it should have a fuse that plug's in to it .!! on the side of the amp.!!! you need to make sure that you use the right size of fuse for that gage of wire.!!! if you use to big of fuse you will have a wire fire or a melt down that burn's the wire in half or worst.!!! hope this help's you let me know. "GOOD LUCK"

Posted on Aug 03, 2008

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  • MICHAEL WALLACE
    MICHAEL WALLACE Aug 03, 2008

    hello yes i understand, the 16 gage is the size of the wire !!! your using .!!! the 2 10 .!!! are for the amp. the left side is one & the right side is the other .!!! they each use a 10 amp fuse's.!!! . that pulg it to the amp.!!! ok u need to put a fuse inline on the that 16 gage wire that your using as the +hot wire. !!! can you tell me what size of amp it is and who make it and the model number .?

  • MICHAEL WALLACE
    MICHAEL WALLACE Aug 03, 2008

    ok you need to go and rate me. !!! in the rating . as fixya. .!!! showing that i fixed your problem.!!! that you where having.!!! ok then . come back and ask me the other . to help you with a nother problem. ok rember rate me as fixya. !!! ok

  • MICHAEL WALLACE
    MICHAEL WALLACE Aug 04, 2008

    hello. ok you need to use a biger wire for your power wire.!!! like a 8 gage wire for your power wire and make sure that u have a inline fuse on it,!!! also

    what size is the groud wire your using.? let me know.ok" "GOOD LUCK"

  • MICHAEL WALLACE
    MICHAEL WALLACE Aug 18, 2008

    hello. how is your amp working.? now. ?let me know.!!! ok.

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If you want to get more precise, figure out everything in terms of power (watts).

Basic electrical rule 1, 2 and 3:

voltage x current = power

or re-arranged:

current = power divided by voltage

or re-arranged:

voltage = power divided by current


For example, 12V X 2 amps = 24 watts.

or another example, 400 watts divided by 120 Volts = 3.33 amps

A 55W headlight that uses 12V would draw 55 /12 = 4.6 amps @ 12V

A 55 watt light bulb in a lamp at home would draw 55 / 120 = 0.46 amps @ 120V


As the previous post mentioned, inverters are not perfect when convertering 12V into 120V. If the converter consumes 1000W from the 12V battery, then a 90% effecient converter would generate 900W of 120V AC power best case. The other 100W is lost primarily as heat.

The other thing that gets tricky is that these ratings and the formula above are used for resistive loads, like light bulbs or hair dryers. Anything with a motor or transformer is considered an inductive load and can get much more tricky to calculate.

Consequently you need to give your self a safety margin when figuring out how big an inverter you need.

How does work in a practical sense?

Lets say you want an inverter for TV, DVD and Sat. Receiver. Look at the back of TV or in the manual. It should say how many watts it consumes. Lets say it is 400W. The DVD might be 100W and the Sat. receiver 50W - just as an example.

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Now you can see your 600 Watt inverter isn't big enough to do the job.

If we really need 550 watts of AC, add 10% to make up the effiency loss, then add a safety margin for inductive loads.

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Sounds more like an 800W inverter fits the job.

What does that mean in terms of wiring the 12V batteries to the inverter?

from the formula above:

current = power divided by voltage

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current = power divided by voltage
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Now that's a lot of science for a guy who just wants to run a toaster on an inverter right?

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That is a good ratio with a good safety margin.

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