Want to add aux fuse box

[wmonroe]

A Painless wiring kit is what I used, about $70 but well worth it. So far it is only powering some lights and a 12 volt plug but I want to add a circuit for my sprayer and Mayberry a trailer light connection with brakes.

 

[truckdiagnostics]

I have wired a lot of our aux lighting like the attached. We mount the relay close to the lights, run the power directly to the battery through a fuse. Then control the ground side of the relay with small 22 awg wire. Also leaves short run for power. This way we only have to run small single wire into or up to the cab, use small switch and find our ground. Now if you have to have things only work with ignition on going to get tricky. :confused2:

here is link to sealed relay and connector
Hella 7794307 20/40A Skirted Mini Relay w/ Mounting Bracket
ISO MINI WEATHERPROOF RELAY CONNECTOR WITH 12" LEADS - 75610

 

[Mike from MI]

I have wired a lot of our aux lighting like the attached. We mount the relay close to the lights, run the power directly to the battery through a fuse. Then control the ground side of the relay with small 22 awg wire. Also leaves short run for power. This way we only have to run small single wire into or up to the cab, use small switch and find our ground. Now if you have to have things only work with ignition on going to get tricky. :confused2: here is link to sealed relay and connector Hella 7794307 20/40A Skirted Mini Relay w/ Mounting Bracket ISO MINI WEATHERPROOF RELAY CONNECTOR WITH 12" LEADS - 75610 <img src="http://www.tractorbynet.com/forums/files/customization/404946-want-add-aux-fuse-box-relay-ground-act-jpg"/>

That's what I was planning on doing at first. Then thought it would be nice just to add a box that way if I want to add more accessories I won't have a bunch of lines running from battery to where ever I need power.

 

[Farmall45b]

I installed an aux. fuse block on my b2320. What I did was figure out how much current all the circuits I wanted to add ( or might decide to add) would be. I then ran a wire from B+ of the appropriate size for current needed to an ISO relay. I fused this wire as close to the battery as possible with a fuse appropriate for the size wire I was using. I controlled the ISO relay with key on power so that the relay would power the aux. fuse block when the key was on. I then wired light ect. to the aux. fuse block using wire appropriate for the load of the accessory and fused it accordingly. Fuses are meant for protecting wiring and is what should be used here. Circuit breakers are mean for protecting devices ( power window motor for example) and should be used to protect the component on a fused circuit.

I have gotten a bunch of wiring supplies from Del City - Electrical Supplies & Professional Grade Wiring Products. There customer service is good, prices and quality are above average and they carry pretty much everything that you need for a project like this.

 

[skyhook]

So just upgrade to 40 or 60 amp fuse and relay and should be good to go? Sorry for all the questions but I want to make sure I do it right and not damage anything.

Those kits that others have posted are nice, you could go that route also, but if you already have the stuff you showed, it's your call.
Yes, you should be good to go, start with a 40 amp, and depending on what ever you add later, you can upgrade to a 60. Proper wire size is important that matches the circuit is also important, as stated.
You'll want to keep these fuses out of the elements (weather).
If you do add more "aux" circuits to your fuse box later, depending on what you add, you can also add more relays for that circuit, if needed.