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Wiring Questions - HELP PLEASE

joel-xj

NAXJA Forum User
Location
Phoenix
OK...I just ordered a 1200/2400w and an 800/1600w (continous\peak) power inverter. I was planning on running the 800 under the passenger seat and the 1200 in the rear cargo area off of the battery under the hood. The likelyhood that I will ever need 1200w is minimial but I would like to be able to run a TV, lamp, computer, and maybe some power tools from time to time.

From the research that I have done it looks like I would need to run 3/0 guage wire and a 200amp fuse to the rear. Does this sound like massive overkill to anyone else? Can I get away with a 2g wire in this application. Does anyone have a similiar setup and some suggestions? Thank!
 
Just Use welding cable and call it a day......as far as the fuse goes use this formula to determine how many amps you'll be pulling:watts divided by volts=amps.....look at the capacity rating and amp draw on the inverter package to know for sure.
 
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Figgure out how much total amprage you could be drawing at full load. Doing the math you going to be pulling 166A at full load. I didn't bother with the peak wattages 'cause they will only be for a few seconds. A 2AWG wire is good for 200A, and for the fuse I would eather run a 175A, or 200A. If I where doing it I would run 2AWG to a distrabution block at the first inverter then go with a 4AWG wire on back to the second inverter. In truth you could probibly run 4AWG, and 8AWG wire, and be fine. Your not going to be able to pull a full 166A continous anyway unless your planning on getting a high output altanater that can put out at least 200A.
 
We really need to know the DRAW of the inverter but the 2 to 4 AWG sounds safe.
Then take into account that a truly 175 amp load will pull down most any one battery that will fit under the hood to below 9 volts in very short order. The point at witch most inverter drop off line do to low battery voltage.
If your thinking about winches or lifts. Most of them will pull the battery down until its dead. Most inverter will not.
Then a true 175 continuos reliable Alt will come out of an airplane be about 14/15 inches across, put out 24 volts and cost 300 bucks rebuilt.
If you really need 2000 watts at 110 volts continuos. Buy a stand alone generator.
 
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Yow! 3/0? That's nuts!

1 AWG is good for somewhere around 300A (I'd have to check,) and 4AWG for 130A I think, for runs under 50 feet. I offer both in custom lengths.

You'll be able to ground the rearmost inverter on BARE sheetmetal if your chassis grounds are in good shape, othewise, you'll want to pull one forward to the battery.

If you'd like to simplify things, hit me backchannel (PM or JeepI6Power AT yahoo DOT com) and I can see what it would cost to set you up. I'd need measurements and termination, and I can explain how to do that when I answer.

5-90
 
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