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03-03-2018, 02:09 PM | #1 |
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Join Date: Nov 2012
Location: Avon, Indiana
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Wiring Fuse Block for 12V Accessories
Want to place 12 volt battery in trunk, place fuse block below under the dash & wire couple 12 volt accessories to fuse block. Where would positive & negative leads from the trunk battery normally be connected to this type fuse block. The two tall posts? The accessories to the fused screws on left?
This fuse block is Sierra FS 40540-1 at https://www.westmarine.com/buy/sierr...s--P010499432. Am open to suggestions on more suitable fuse block. |
03-03-2018, 02:50 PM | #2 |
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Join Date: May 2010
Location: uk
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Re: Wiring Fuse Block for 12V Accessories
the large post on the left just acts as a common feed. the large post on the right hand side would be the earth. the screws on the back of the fuses go to the accessory.
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03-03-2018, 03:15 PM | #3 |
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Join Date: Nov 2012
Location: Wichita KS
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Re: Wiring Fuse Block for 12V Accessories
I use a fuse block like this. Boat supply places normally carry this type of electrical hardware.
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03-03-2018, 03:31 PM | #4 |
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Join Date: Jan 2014
Location: Orcas Island Washington
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Re: Wiring Fuse Block for 12V Accessories
Is your vehicle still 6 v positive ground? Are you going to ground the 12v in the trunk to pos? I know little about electricity, but doesn't the ground (frame) carry the load as well? I used to tow a tandem axle trailer behind my stock 6 v pos 38 truck. The trailer brakes were wired to a tongue mounted 12 v battery and neg ground. Years later I wondered what happened to those electrons meeting each other at the trailer ball. Could this be a problem for your modification?
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
03-03-2018, 04:04 PM | #5 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: Wiring Fuse Block for 12V Accessories
Be careful when using generic marine fuse panels. I have one on my test stand, and the metal "thingies" that hold the fuse itself aren't very "springy". Every time I change a fuse, I have to squeeze them together with a pliers to make sure I get good contact. Check it out before you plunk your good money down.
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03-03-2018, 06:23 PM | #6 |
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Re: Wiring Fuse Block for 12V Accessories
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03-03-2018, 06:49 PM | #7 |
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Re: Wiring Fuse Block for 12V Accessories
Road Journey: I don't know what you're working on or how original you want to keep your car but I'm with BillM above .... because of natural long-term corrosion of metals due to moisture in the air, I believe "blade" type ATC and ATO fuses provide a longer lasting and more positive connection than glass tube fuses (i.e. contact area). I also think its a little easier to see a burned element in them. i.e. witness how long car manufacturer's have been using them.
Regardless, I recommend reading up on the internet about wiring systems, connectors, fuses, etc. before you go very far. I upgraded (made safer) my '47 system and read what http://www.madelectrical.com/ had to say. The author's been around for a while and is/was an insurance inspector regarding vehicle fires. He has some sound ideas about how electrical systems can be made safer. I didn't adhere to all of them but used many such as reducing electrical resistance in the system, selecting wire, making wire connection, using relays, etc. He may be in the business a bit but good to read his ideas. And to be sure, there are others on the internet that offer good advice. Last edited by Drbrown; 03-03-2018 at 08:50 PM. |
03-03-2018, 08:48 PM | #8 | |
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Re: Wiring Fuse Block for 12V Accessories
Quote:
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