4/0 AWG overkill for rear accessories?

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If your going thru all the trouble, you might as well put a 12 slot Blue Seas box in. I did a 6 slot a couple months ago, and now I wish I had put a 12 in! Seems once you know you have a good power source back there, things come out of left field that will fill your box up quick!
Thanks @Marine7. Out of curiosity, what amp fuse did you install up at your battery?
 
Thanks @Marine7. Out of curiosity, what amp fuse did you install up at your battery?

I put an 80 amp fuse inline, next to the battery. Probably overkill, seeing the biggest draw is 30amp (OBA). Probably switch it to a 50 amp.
 
I put an 80 amp fuse inline, next to the battery. Probably overkill, seeing the biggest draw is 30amp (OBA). Probably switch it to a 50 amp.

Just add up your fuses in the new box, and you should be good.
 
HA! This is awesome! I have two defunct microwaves in the garage for an upcoming project. With that gauge, and some microwave internals, you could build a welder where the spare sits! And you could set it up for mig, tig, stick - whatever! Well, whatever except torch welding.

Yes! 4/0 all the way!!! So badass!

:popcorn::popcorn::popcorn::clap:
 
I think it's unnecessary and not worth the struggle of trying to get it to fit correctly under trim, through the firewall and is more likely to cause a short due to size. you will have a hard time finding lugs to fit your fuse panel and to keep them shielded. Think about. The radius of bends on that stuff!
Also Much easier to cover the appropriate size cable and keep it tucked away.
 
UPDATE: Okay, sanity took over and I decided to bag on the 4/0 and step down to 1/0 wiring. Even this is overkill as it'll be rated for 200 amps at 20ft. I'll be running a Blue Seas 100 amp breaker at the battery. Along with a few extra leads of 8-ga wire in the event I with to run some switched relays in the future, I'll shrink wrap the bundle and start snaking it back.

Here's my question: From the aux battery to the rear quarter panel, is it better to run this wiring inside of the cabin (through the firewall) or down along the frame (up through the floor)? I have a 1/0 bulkhead fitting for added protection and safety.
 
id run it inside, more protection and if you have to replace it for some reason itll be easier to chase the new wire with the old one. not like power lose is going to be a big deal but itll probably also be a shorter run of wire
 
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Here's my question: From the aux battery to the rear quarter panel, is it better to run this wiring inside of the cabin (through the firewall) or down along the frame (up through the floor)? I have a 1/0 bulkhead fitting for added protection and safety.

Could suspend it under the rig with some of these, would add a piece of mind, less chance of shorting/arcing to frame?
suspension-string-insulator.webp
 
Having done both its not where the wire is run but how its run.
I guess I should rephrase my question. I would prefer to run the wiring through the firewall, but I have this unhealthy obsession with keeping that clean, factory fresh appearance (I so appreciate the @NLXTACY sickness). If run through the interior, is there sufficient room in the harness tracks to route 1/0 without bulging the trim or casing lumps in the carpet? If yes, I'd do the extra work to achieve this. If other have tried and failed, I'll focus my efforts under the truck.
 
I guess I should rephrase my question. I would prefer to run the wiring through the firewall, but I have this
unhealthy obsession with keeping that clean, factory fresh appearance (I so appreciate the @NLXTACY sickness). If run through the interior, is there sufficient room in the harness tracks to route 1/0 without bulging the trim or casing lumps in the carpet? If yes, I'd do the extra work to achieve this. If other have tried and failed, I'll focus my efforts under the truck.

I ran mine through the inside of the frame away from any possible harm. Years later I pulled it out when I sold my 60 and it looked as good as the day I installed it.
 
I ran mine through the inside of the frame away from any possible harm. Years later I pulled it out when I sold my 60 and it looked as good as the day I installed it.
Would I have used the 4/0, that was my plan of attack - through the frame-rail.
 
Would I have used the 4/0, that was my plan of attack - through the frame-rail.

I read your question as for the safest wire placement location, size should not matter it this case.:grinpimp: I have #10 in the same place on my LX470 to provide power for my fridge.
 
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