CCA vs OFC vs Tinned Copper wire?


jballard81

Terminal Procrastinater

Joined
Feb 24, 2024
Messages
546
Points
101
City
North Carolina
Vehicle Year
1994
Engine
4.0 V6
Transmission
Automatic
I'm planning on building my own 9007 relay harness. I'm handy with just about anything but won't pretend to be an expert in this area. The reason i want to build my own harness is all the stuff that i've found online looks to be junk that won't last very long OR is very expensive.

I keep seeing that CCA is meant for low voltage applications, but how low? Do i need ofc or tinned copper for this harness?

Looks like i can get tinned copper for ~2x the price of CCA and i don't need to cheap out at this point, but i wanted to see if anyone with real experience with these different types of wire would feel like giving their $.02

thanks!
 
So, Bronco Graveyard has the harnesses reasonably. Better price than I can build one for. I have one in my Choptop currently. I had to swap two pins to make it work right in mine but that may not apply to everyone.

CCA wire is Copper Coated Aluminum. Also known as garbage. I bought a couple rolls of CCA zip wire (18 gauge red and black lamp cord looking stuff) and even using dielectric grease the stuff corrodes to garage in no time around here. Regular copper auto grade wire or THHN is fine, the tinned copper is more for marine applications.
 
this is why i ask! appreciate it!

i'll check out bronco graveyard first as well lol
 

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