12 Volt Wire Size & Length Calculator

[GoDadGo]

Hey Gang,

I'm pretty good at a lot of things, but electrical systems, circuit loading and wire sizing isn't one of them.
My concern grew out of the size/capacity (Total Fused Circuit Amps) of the fuse block compared to the total load capability of the single ground wire.
Anyway, I thought you all might have the same concerns so I wanted to share this wire size calculator that I use to help me pick wire sizes and lengths.

https://www.wirebarn.com/Wire-Calculator-_ep_41.html

Have A Great Day!

Steve

NOTE: .. I've added a grounds for each high load item.. (Lights & Cooling Fan)..to create additional redundancies in the grounding of my electrical system.

[Jim1855]

Thanks Steve. An excellent resource.
Jim

[Mark Eaton]

Hey Gang,

My concern grew out of the size/capacity (Total Fused Circuit Amps) of the fuse block ground compared load capabilities of the fuse box ground wire.



Thanks Steve, It has become very clear to me from reading multiple "electrical" threads how important a robust grounding system is. I have added multiple grounds including to the engine block/heads. I did not add any extra ground wire to the RF fuse block, have you?

Mark

[mike223]

Looks pretty good to this 30 year industrial electrician at 13.8v / 5% drop, and use one size larger than minimum for the length of wire.

It does get wonky if you look at realistic starter amperage ranges (400-800), but that is a very short term and self regulating load - #2 is the biggest you'll need for these cars.

[GoDadGo]

I did not add any extra ground wire to the RF fuse block, have you?

Mark,

No, I didn't add an additional ground to the fuse block, but I did attach it in two places to the frame.
I also have two grounds on my engine block and two grounds from the battery to the frame.
I guess that makes me Mr. Duplicity from a grounding perspective.

Steve

[Vspeeds]

Steve
Thanks for sharing the calculator. Im done with my wiring but this would have made things easier. Ill use it for future projects.