Amp Breaker

318willrun said
All of my classics are "bare minimum" on accessories. Wipers, lights, heater fan. I'm not a wiring specialist, and I've seen so many ways people protect their investments.

Run a large red wire from the +power on the alternator to the starter relay + post.

Some put the amp gauge wires on the same post so the gage doesn't melt down. Then install a volt meter gage instead.

Some have bypassed the amp gage at the bulkhead.

Now, I watched a video where Steve D. went to A/C and used a circuit breaker after the relay AFTER he installed a 120 amp alternator.

All make sense but the CB Steve used and where he used it. Trying to see and learn, protect my investments.

Currently, none of my cars are burning (since I last looked.. lol)

A lot of people do a lot of things.
Nothing wrong with the factory setup for factory like you have.
If the car has anything other than the 6012 headlights, then a relay harness powered from the alternator will (a) protect the headlight circuit, (b) provide brighter lights, (c) divert those 9-10 ampos so they never go through the bulkhead connector or the main splice.

A voltmeter doesn't show battery charging or discharging. It shows system voltage at the location its connect to. From that we must assume the charge rate is OK. It doesn't show if the charge rate is 5 amps or 50 amps.
The ammeter doesn't show voltage. We assume when it shows normal charging and discharging that the system is OK, and when it shows something like discharging while the engine is running, the alternator isn't working.

If you like videos, there's a bunch in this thread from a guy delving into this. I didn't watch them but he seems to understand the issues.