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Blue Sea fuse box vs bus bar

Discussion in '3rd Gen. Tacomas (2016+)' started by littlefish, Dec 25, 2018.

  1. Dec 25, 2018 at 8:31 AM
    #1
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    As I’m adding accessories wiring is quickly piling up and becoming unorganized. I recently ordered a @Mr.PowerTrays tray to mount an ARB compressor, and while I was at it I ordered an 8 circuit terminal block and a 10 screw common bus bar. I wasn’t really thinking about my plan when I ordered these, just threw them into the cart because they weren’t all that expensive.

    Right now the accessories I have wired up are @XenonDepot HIDS, and I will be adding a @Baja Designs S8 light bar, plus adding an ARB single air compressor. I’m also adding a Smittybilt X20 winch but I’ll be keeping the wires for that right on the battery terminals.

    Assuming I didn’t want to buy a fuse box, could I just mount the bus bar and terminal block to the tray and hook the positive wires up to the bus bar and the negatives up to the terminal block? Would I use 4 gauge wire from the battery to the bus bar?

    If I did use a fuse box, how do I handle inline fuses as all my accessories have in line fuses? Would I put a higher amp fuse into the inline spot, and use the correct amp fuse into the fuse box?

    What else am I missing / do I need?
     
  2. Dec 25, 2018 at 8:47 AM
    #2
    tacomarin

    tacomarin ig: @the_chubby_unicorn_trd

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  3. Dec 25, 2018 at 8:49 AM
    #3
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    So the accessories wire into the bus bar, and then into the fuse box? Isn’t that redundant?
     
  4. Dec 25, 2018 at 9:03 AM
    #4
    JdevTac

    JdevTac Bawnjourno

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    You run one or the other, not both. Same thing with your fusing, if you have a fuse box with built in fuse slots then you don’t run an additional inline fuse. You just need one fuse on the line. Some, including myself, run an additional fuse for the large gauge wire that runs from the battery to the fuse panel.

    Edit: for your grounds a bus bar is good to use. Some fuse panels have built in negative busses also just depends on what you get.
     
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  5. Dec 25, 2018 at 9:06 AM
    #5
    JdevTac

    JdevTac Bawnjourno

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    See my setup, Bussman RTMR, has built in 5 circuits that utilize relays and an additional 5 circuits for straight fused accessories (no relays) for 10 circuits total. You can see toward the firewall I have a blue sea buss bar for all my negative leads, and a large gauge cable attached to that which then runs to the battery ground on the fender adjacent to the battery.

    638A8450-656B-41C7-A977-186987018670.jpg
     
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  6. Dec 25, 2018 at 9:17 AM
    #6
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    Ok that’s what I thought. But if I remove the inline fuse won’t the accessory not work since power can’t make it without the fuse in the slot completing the circuit?
     
  7. Dec 25, 2018 at 9:18 AM
    #7
    tacomarin

    tacomarin ig: @the_chubby_unicorn_trd

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    A bus bar is a common block where all the terminals are linked together. You would use that for all the negatives. The block is separate terminals. I think that combo is more commonly used for wiring up switch pros. With the blue seas you wouldn’t need either.

    If you are just running a couple accessories though it may not be worth doing all that. You could either get a relay mount and in-line fuses, or wiring harnesses that have in-line fuses and relays all combined.
     
  8. Dec 25, 2018 at 9:19 AM
    #8
    JdevTac

    JdevTac Bawnjourno

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    If you wire everything to a fuse block, you snip off the in-line fuse that was already attached to your accessory, and if let’s say you have a blue sea panel, you crimp on a ring terminal and attach it to the blue sea panel, and put in whatever fuse size your accessory needs in that circuit. The main power lead from battery to the panel already supplies power to the panel.
     
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  9. Dec 25, 2018 at 9:22 AM
    #9
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    All my accessories have inline fuses and relays already. What would I do about all the leads adding up on the battery terminals then? That’s my only issue really. If I’m counting right I have four plus another fifth if you count the winch too.

    Gotcha. Makes sense now thank you!!
     
  10. Dec 25, 2018 at 9:36 AM
    #10
    tacomarin

    tacomarin ig: @the_chubby_unicorn_trd

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    You could either hook them up directly to the battery or use something like this and run one 4ga wire to the battery and another ground.

    Fastronix 3/8" 4 Stud Power Distribution Block with Cover https://www.amazon.com/dp/B078VGKC8T/ref=cm_sw_r_cp_api_i_RSMiCbV6HD48S

    Would just need to find somewhere to mount it in the engine compartment.
     
  11. Dec 25, 2018 at 9:50 AM
    #11
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    So that’s basically a bus bar which I already have so I could just use that right?
     
  12. Dec 25, 2018 at 9:57 AM
    #12
    Marbleyard

    Marbleyard Thread killer

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    SOLD 2016 taco: premium technology and tow package. OV Tune 1.05; A.R.E. V Camper Shell; BRO grille & Tails; OEM bed mat; Xenon Depot HID headlight conversion; reflective gray tailgate letter inserts; GoPro session; Hondo radio knobs; K&N cold air intake, quicksand painted dash bezels, Subaru dash speakers, Kicker CS 6x9 fronts and 6.5 rear speakers; All LED interior lights and LED high-beam headlights. Redline elite hood shock props. prinsu cab and camper rack with rough country 30" light bar; (2) 8" rear facing “F.U.”rough country black LED lights; prinsu cargo basket kit, (2) prinsu load racks; roadshower 4; ARB 2500 awning and room kit; weather tech floor mats; carhart seat covers; ckma12 ARB air compressor under the hood; blue ridge overland gear air tools bag, tool bag, driver's seat molle. Rack mounted TRED 800 recovery treds and plano case. Rotopax water and fuelpax fuel canisters; Pelican cased first aid kit in bed. rockblokz mud flaps. ARB rear dif. breather. Stand alone fuse block. SSO bumper with 10k smittybilt synthetic line winch and factor55 ultrahook. Pro Eagle 2-Ton “The Beast” jack. OME lift kit: 90000 front shocks and 886 OME coils, Camburg 310078 UCA, 60091 rear shocks with light duty Dakar leafs. Good Year duratracs 285/75R16. Black vinyl inlays on factory OR wheels; RCI Steel Front/Trans/Trans Case/Rear Diff Skids, Alum A-Arm; Mobtown bolt-on sliders with scorpion bed coating; pelfreybilt aluminum fuel tank skid; Cali-Raised full length Molle storage LH & RH bed sides; Caliraised bedside reinforcements; HELLA sharptone horns; Optima blue-top battery with AJT machined red tiedown bracket. AJT quicksand key fob. Overland Bound member #6996
    Haven’t shared my set up since I finished. Wasn’t real easy but I’m pleased with it. Winch power is run through the breaker the compressor is tied into the studs on the battery.
    ED318C38-33EB-48B4-80B7-B89D7922B415.jpg
    841C124B-0B83-4ED9-8339-C8649FDB6567.jpg
     
    littlefish [OP] likes this.
  13. Dec 25, 2018 at 10:17 AM
    #13
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    tacomarin likes this.
  14. Dec 25, 2018 at 10:38 AM
    #14
    theesotericone

    theesotericone Well-Known Member

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    Have you winched since you installed it? A winch can easily pull 200A on even a small pull. My winch goes from my battery to a 350A disconnect. My compressor is also wired direct to the battery. My after market accessories go from battery to a 100A relay that is wired to the ignition. From the relay it goes to a 100A breaker. Then from the breaker to a Blue Sea 12 w/neg. As soon as I turn the key to the off position all my after market power goes dead because of the relay. My winch is dead all the time because the disconnect it always off unless I'm wheeling.
     
  15. Dec 25, 2018 at 10:42 AM
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    tacomarin

    tacomarin ig: @the_chubby_unicorn_trd

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    Yes but you will need one for positive and one for negative.
     
  16. Dec 25, 2018 at 10:46 AM
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    tacomarin

    tacomarin ig: @the_chubby_unicorn_trd

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  17. Dec 25, 2018 at 10:56 AM
    #17
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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  18. Dec 25, 2018 at 11:04 AM
    #18
    tacomarin

    tacomarin ig: @the_chubby_unicorn_trd

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    Calculate your total amp draw. All your accessories are going to be wired in parallel with that setup so you can add up all your in-line fuses that your accessories have and put a fuse in equal to or greater than that. Or take the power (W) of each accessory, add them all up and divide by 12V to get the total amp draw and put a fuse in a bit bigger than that.
     
  19. Dec 25, 2018 at 11:07 AM
    #19
    littlefish

    littlefish [OP] Buzz, your girlfriend...

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    Excellent. Thank you so much for all the great ideas and answers!!
     
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  20. Dec 25, 2018 at 1:34 PM
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    Marbleyard

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    Not more than to cycle and re-spool. I will take tools with me and put under a load next respool and see if it kicks. Thanks for the heads up!
     

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