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Looking for intro help for powering lights/equipment

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Old 09-30-2014, 11:51 PM   #1
st101 [OP] st101 is offline
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Looking for intro help for powering lights/equipment

Hello all,

Was wondering if I can get a quick nudge in the right direction on expansion/modification of the electrical system in the vehicle so I can provide power to lights, a computer, cameras, etc. If there is a good sticky or tutorial thread somewhere, please link me over! I have a 2014 DCSB TRD Sport.

Have tried making a few searches on the forum but I can't find much aside from 'show off your distribution box!' threads.

Elsewhere on the web I've seen people adding 2nd batteries, new distribution/relay boxes, using add-a-fuse on the existing in-cab fuse box, or just wiring straight up to the battery. Which is the right solution for which application?

Should light bars with fairly large current-draws be hooked up direct to the battery?

At what point are mechanical relays appropriate?

How can I provide power to items without having to turn the key to accessory mode or ignition? Subsequently, how can I prevent leaching of the battery for those items over night?

At what point does it become "too much" for the battery? Some of the overland folks have a winch, air compressor, refrigerator, and a boatload of lights (obviously not all running at the same time) -- what kind of power distribution system are they likely to be using?

Thanks in advance for any help/guidance!
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Old 09-30-2014, 11:59 PM   #2
I'm lost
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12v system basics: don't overload wires, positive to positive, negative to negative (ground). Your entire chassis is a ground. Use relays when necessary. Fuse everything.

Bam, you can wire anything now.
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Old 10-01-2014, 08:20 AM   #3
st101 [OP] st101 is offline
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Thanks, but I don't know that I'm out of the woods yet...

I understand some things are common sense -- I'm OK on selecting the right gauge wire and grounding, but how much additional load can a battery take before other systems within the vehicle begin to suffer?

For relays, how do you define "when necessary"?

When do I use solid wire and when do I use stranded wire?

Does everything get a fuse or only the beefier items?

Thanks!
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