pos battery post fuse - Team Camaro Tech
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post #1 of 21 (permalink) Old May 21st, 17, 02:03 PM Thread Starter
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pos battery post fuse

I was thinking of installing a 200 amp battery post fuse for my trunk mounted battery, I'm in the middle of an LS Swap. What do you guys think ??? Thx
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post #2 of 21 (permalink) Old May 21st, 17, 04:12 PM
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Re: pos battery post fuse

Add up the value of all of your devices (just list the fuses in the fuse box and add them up plus any individual fuses) to know what the max current draw would be. Items like the 30 Amp cigar lighter probably are not being used (Not even "Dandy Dick" Landry smoked a cigar while driving, he just chewed it).

I would think it wouldn't be that much. Either way instead of a fuse try an auto resetting circuit breaker instead. You probably won't find a lot of 200 amp fuses at your corner discount auto part supplier.

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post #3 of 21 (permalink) Old May 21st, 17, 04:12 PM
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Re: pos battery post fuse

Sorry double posted some how

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Last edited by Larger Dave; May 21st, 17 at 04:13 PM. Reason: fubar
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post #4 of 21 (permalink) Old May 21st, 17, 04:39 PM
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Re: pos battery post fuse

I went with a F*rd solenoid so the line is only hot during cranking....and of course a battery disconnect switch to be NHRA compliant.

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post #5 of 21 (permalink) Old May 21st, 17, 05:01 PM
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Re: pos battery post fuse

I like these

2011-2014 Ford F-150 Battery Cable Circuit Breaker Fuse Relay OEM AL3Z14526AA | eBay

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post #6 of 21 (permalink) Old May 21st, 17, 05:07 PM
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Re: pos battery post fuse

Good idea. I used a Stinger resetable circuit breaker through. Nothing like being away from everythin, have and issue then fix the issue and no fuse to be found for miles. 200 amp is plenty. Unless you have a monster stereo system a stock car with AC will never draw 1/2 that even with the lights on. This is short circuit protection.
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post #7 of 21 (permalink) Old May 21st, 17, 05:26 PM Thread Starter
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Re: pos battery post fuse

Quote:
Originally Posted by DOUG G View Post
I went with a F*rd solenoid so the line is only hot during cranking....and of course a battery disconnect switch to be NHRA compliant.
I'm going to use the quickcar solenoid as well.

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post #8 of 21 (permalink) Old May 21st, 17, 05:33 PM Thread Starter
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Re: pos battery post fuse

Don, how exactly does this circuit breaker work??? Install on pos batt post ???

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post #9 of 21 (permalink) Old May 21st, 17, 05:44 PM
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Re: pos battery post fuse

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Originally Posted by DT View Post
Don, how exactly does this circuit breaker work??? Install on pos batt post ???
It's just two fuses. 250 and 140. Seller jammed every term he could think of in the auction title. It bolts right to a battery post connector with a stud. I like to use OEM parts like this since they have high reliability requirements and testing.

I also keep a spare in the glovebox. I would also keep a spare circuit breaker if you decide to go that route.

Don
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post #10 of 21 (permalink) Old May 21st, 17, 05:50 PM
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Re: pos battery post fuse

Even with a solenoid, if there is a short past it, the contacts could weld themselves together and with the solenoid activation power removed, it could still pass power into a short.

With any fusing or circuit breaker, it must be sized to the wire size that is being attached to it.

Every model of fuse will have different operating characteristics. When I put on fuses for the main battery power, I use the ANL type and not the ANN types as both have the same footprint and take the same fuse holder, they operate differently on how fast they blow. a 300A ANL takes longer to blow than a 300A ANN model even though both are rated for 300A.



One type of fuse I've seen crop up for marine use are these little cube fuses. They are a lot more compact than breakers or the ANL type of fuses.






This is a battery with an ANL type of fuse on the positive battery cable before powering anything else on the car:




Even a lot of newer cars have main fusing which could be used on older setups and cars:





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post #11 of 21 (permalink) Old May 21st, 17, 06:31 PM Thread Starter
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Re: pos battery post fuse

Thank you Jim for the detailed info. I came across one of those cube fuses and it got me thinking, which prompted this thread.

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post #12 of 21 (permalink) Old May 21st, 17, 06:32 PM
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Re: pos battery post fuse

This is what I use to power my main bus:

SDLM-150

And I use these in 10, 15, 20 or 30 Amp size circuit breakers instead of fuses to power individual circuits.

123A50A2PHA

Fuel pump is on a relay powered off the battery since both are in the back of the car. I used a pair of 01 Taylor battery cable to bring power forward to the fire wall.



combined with a Ford starter relay for the starter motor.

If you want to retain the stock fuse box and wiring (I yanked it all out when building a racer) you can use these instead of glass envelope one shot fuses; as they reset when they cool off:



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post #13 of 21 (permalink) Old May 22nd, 17, 02:44 PM Thread Starter
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Re: pos battery post fuse

Thanks guys.

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post #14 of 21 (permalink) Old May 22nd, 17, 02:58 PM
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Re: pos battery post fuse

Can I just ask?

Why?

On my Protour cars I run from the batt in the trunk to the Quickcar Solenoid (about 12" long POS cable). Then the wire to power the car forward connected with a fusible link.

A lot of money and effort to protect 12" cable from Batt to Solenoid.

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post #15 of 21 (permalink) Old May 22nd, 17, 04:09 PM Thread Starter
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Re: pos battery post fuse

Quote:
Originally Posted by Vega$69 View Post
Can I just ask?

Why?

On my Protour cars I run from the batt in the trunk to the Quickcar Solenoid (about 12" long POS cable). Then the wire to power the car forward connected with a fusible link.

A lot of money and effort to protect 12" cable from Batt to Solenoid.
LOL, I was having a moment. I'm back to reality now, haha.

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