Either item will work but, that fuse box looks like a lot work. You can get a fuse box that is already wired internally. I did make a mistake on my diagram. Instead of post 86 going to the battery power, it should go to the power side of the glove box outlet. On my 2015 Slingshot, it's the gray with an orange tracer. And post 85 of the relay would go to a chassis ground. Sorry, here's the new diagram; I posted both so you can see where I went wrong. The correct one is right side up
Too many electrical wires going to the battery
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Ok I have a fuse block the holds 6-30amp fuses...everything I've read so far says to put a fuse between the battery and the fuse box.....the question is how big of a fuse do I need for this fuse block?
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Check the specs listed here:
Polaris Slingshot Fuse Block with Wiring Harness -
I have that box and I'm not crazy about it...anyway it has the capacity of 6-10amp circuits and has a 30 amp fuse so using that formula...my new one has the capacity of 6-30 amp fuses equaling 180 amps...half of that would be 90 amps so if I use a 100 amp fuse or and 80 amp fuse I should be good...it's a 4GA feed wire to my new block,...that one is a 12GA wire.
That formula might not be correct though because I have a 200 amp box in my house and you can put way more than that in it..with 30 openings...even if you used 10 amp breakers you're 100 over 200. I'm at about 500.
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What are you running that requires a 30 amp fuse? Speakers, amplifier, toaster oven, cappuccino maker, microwave?
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Seat heaters, maybe a small heater.....that air horn has a 25 or 30 amp fuse..... The box can handle up to 30 not everything will be 30....I like to do things right the first time and that aux fuse box I installed already isn't ...it's ok but it has issues ...I'm not crazy about how the wires connect to it...kinda chinchy if you over tighten the screws things start to bend.....the connectors aren't beefy enough for my liking.
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You'll get it figured out. I've got heated sear, halos, Bluetooth underbody LED, curb alert, etc running off the one I shared the link with you earlier in the thread and never have had any issues
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The key is to use separate relays to power up the higher draw items, such as the air horn and seat heaters. It takes a very small amperage to trigger a relay.