new fusebox but on amp.
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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=132129
Printed Date: May 29, 2024 at 5:34 AM
Topic: new fusebox but on amp.
Posted By: ls2cam
Subject: new fusebox but on amp.
Date Posted: September 03, 2012 at 10:23 PM
I fabbed up new fuse box for my camaro car Ls2 carbed without controlled programs (PCM)
I forget, how figure to how much ampere fuse each on these 6 slots
Slots: Slots:
1) 12 ga. (12V hot) / 12 ga. = ? amp. 4) 16ga. (12V hot) / 16 ga. = ? amp
2) 12 ga. (12V hot)/ 10 ga. = ? amp. 5) 12 ga. (12V hot) / 10 ga. = ? amp
3) 10 ga. (12V hot) / 10 ga. = ? amp 6) 12 ga. (12V hot) / 12 ga. = ? amp
Appreciate for help/advice.
Replies:
Posted By: i am an idiot
Date Posted: September 03, 2012 at 10:44 PM
Posted By: ls2cam
Date Posted: September 04, 2012 at 8:43 AM
Give me the calculator/formula to figure out how much the amp from volt and cable length?
For example:
1) 12 ga. (12V hot)/ 12 ga. = should be 25 amp. @ 3 feet length. Is it correct? It goes to alternator (100AMP) from fuse box.
Posted By: i am an idiot
Date Posted: September 04, 2012 at 10:19 AM
Look at the chart labeled Power and Ground Cable Specs. It gives you the current rating of each Gauge of wire. 12 Ga wire should be fused at no more than 40 amps. 16 Gauge a maximum of 15 amps.
Posted By: oldspark
Date Posted: September 04, 2012 at 3:53 PM
My method is by formula:
I decide what maximum voltage drop I desire. (Few cable rating tables state that. And if 3V is considered a tolerable voltage drop for a 12V system...)
It's then Ohm's Law (V=IR) where R is the cable resistance per length times the length.
Posted By: i am an idiot
Date Posted: September 04, 2012 at 8:54 PM
The chart I sent you to is just to show you the maximum safe current of each of the wire sizes. Just do not fuse at a greater current than on that chart.
Posted By: ls2cam
Date Posted: September 06, 2012 at 8:29 AM
Slots: Slots:
1) 12 ga. (12V hot) / 12 ga. = ? amp. 4) 16ga. (12V hot) / 16 ga. = ? amp
2) 12 ga. (12V hot)/ 10 ga. = ? amp. 5) 12 ga. (12V hot) / 10 ga. = ? amp
3) 10 ga. (12V hot) / 10 ga. = ? amp 6) 12 ga. (12V hot) / 12 ga. = ? amp
I figured those amps..
1. 25 amp.> goes to ign. switch bat.+
2. 25 amp.> headlight
3. 25 amp.> goes to Alternator
4. 15 amp.> alternator exciter
5. 20 amp.> ign. switch acc.
6. 25 amp.> cool dual fans?
Posted By: howie ll
Date Posted: October 12, 2012 at 12:37 PM
1) at least 50 amps to cover all the ign starter and ACC wires.
2) 20
3)?
4)?
5) see no. 1.
6) Try about 60 for rad fans.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: October 12, 2012 at 12:38 PM
Easier to work out the load on what you're fusing then use the relevant wire gauge.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
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