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Username Post: fusing question        (Topic#357395)
Big T 
"14th Year" Silver Supporting Membe
Posts: 2730
Big T
Loc: Simi Valley CA
Reg: 04-14-06
07-27-19 01:25 PM - Post#2771733    

Hi All

I need to provide 12v switched power from the main fuse box on the fire wall to a terminal block mounted in the glove compartment having 4 fused outputs.

Don't know how I determine the main fuse value taking into consideration the other end has 4 fuses with different

Regardless series or parallel, I don't understand what I need to do to insure a safe ckt and accomplish what I am trying to do.
appreciate your help

tom




Tom

55 4 door BelAir


Edited by Big T on 07-28-19 12:36 PM. Reason for edit: rewrite

 


bobb 
Super Senior Member
Posts: 5484

Loc: paradise
Reg: 09-05-03
07-28-19 02:50 PM - Post#2771830    
    In response to Big T

would be good to know the total amp draw you would need. im thinkin relay, something like
https://www.amazon.com/Heavy-Duty-Relay-Spli t-Char... from battery, maxi fuse or circuit breaker to relay. 10 0r 12 gauge wire to your glovebox. this will help the key on circuit to live longer. also gives you an option to run more stuff off it. just replace the maxi fuse or circuit breaker to match your load requirement.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Big T 
"14th Year" Silver Supporting Membe
Posts: 2730
Big T
Loc: Simi Valley CA
Reg: 04-14-06
08-01-19 12:36 PM - Post#2772179    
    In response to bobb

Hi Bob

thanks for getting back to me.

Input from the main fuse block on the firewall, to the distribution block (in glove comp) is fused 12v switched power.

The distribution block has 4 fused outputs and is rated at 100amps total .

One of these outputs is going to the radio which needs to be fused at 15amps.

The remaining three outputs are going to other accessories and will probably be fused at 5amps each or less So around 30amps total

I am using 10awg which is probably over kill given the distance between the two blocks is 2 feet

I thought about a relay (I used them on other ckts (eg A/C, lights etc) but decided to do this one through the ignition/accessories fused ckt. The way my power management system is set up, this way is a whole lot easier to install.

My problem is determining the value of the fuse in the main fuse box

In this case should I fuse at 30 amps, total when all 4 ckts are working or at 15amps.....equal the radio ckt.

I think the 15 amps is the answer but I have no clue if this is correct and I don't want any problems when it is all put together.

Thanks
Tom



Tom

55 4 door BelAir


 
acardon 
Ultra Senior Member
Posts: 11298
acardon
Loc: DFW TEXAS
Reg: 03-25-05
08-01-19 01:57 PM - Post#2772185    
    In response to Big T

The pink wire from the ignition switch to the fuse panel acc is not fused. Nor is any of the red wires under the dash.
Why not run another wire from the extra acc terminal on the switch, directly to the aux fuse panel in the glove box. Lots shorter distance. You don't have to fuse it.


Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
Big T 
"14th Year" Silver Supporting Membe
Posts: 2730
Big T
Loc: Simi Valley CA
Reg: 04-14-06
08-01-19 03:28 PM - Post#2772192    
    In response to bobb

.


Tom

55 4 door BelAir


Edited by Big T on 08-01-19 03:28 PM. Reason for edit: No reason given.

 
warpwr 
"13th Year" Gold Supporting Member
Posts: 955
warpwr
Loc: Santa Clara, CA
Reg: 04-11-06
08-01-19 09:39 PM - Post#2772213    
    In response to acardon

  • acardon Said:
The pink wire from the ignition switch to the fuse panel acc is not fused. Nor is any of the red wires under the dash.
Why not run another wire from the extra acc terminal on the switch, directly to the aux fuse panel in the glove box. Lots shorter distance. You don't have to fuse it.



This... and you could operate a relay from that extra ACC position to supply your fuse panel thereby greatly reducing the current flow through that poor old ignition switch.


Vaughn
56 Delray 327, 5 spd



 
Big T 
"14th Year" Silver Supporting Membe
Posts: 2730
Big T
Loc: Simi Valley CA
Reg: 04-14-06
08-03-19 10:55 AM - Post#2772317    
    In response to warpwr

This info helps me a lot. Thank you all.
Tom

Tom

55 4 door BelAir


 
Big T 
"14th Year" Silver Supporting Membe
Posts: 2730
Big T
Loc: Simi Valley CA
Reg: 04-14-06
08-06-19 02:50 PM - Post#2772566    
    In response to warpwr


took out the ign switch only to find that I put a AAW switch in some time ago and it has only one accessory terminal.


I went back and took a closer look at my installed AAW fuse box and found that it has unfused "plug in" locations in each section.......acc, switched and bat.

There is a kit AAW sells that has several (single wire) connector housings with contacts. Each housing is keyed to fit only one location in the fuse box.

I think this solves my problem.

thanks again everyone for your help

Tom

55 4 door BelAir


Edited by Big T on 08-06-19 02:51 PM. Reason for edit: No reason given.

 


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