the ground wire.
around 14
No you are limited only by engine power and gearing.
Don't think there exists one. The power go from the key cylinder directly to the solinoid on the starter.
why would my starter wire burn, going from starter to battery
A starter will not disengage if the ignition switch is stuck or if the solenoid has jammed. This will cause the starter to constantly receive power.
bad starter or starter solenoid.
Yes, the power goes through the relay before the starter gets it so if the relay is bad, there is no power to the starter.
The positive battery cable connects directly to the starter. Depending on what type of vehicle it is, the solenoid is either on the starter or on the inner fender. Power for the solenoid comes from the ignition switch. You can run a wire to the solenoid to cause the starter to engage.
Starter may have gotten wet and frozen or shorted. Check wiring to starter See if you are getting power to starter
Start by checking battery voltage and then use a test light to check for power at the starter when the button is pressed. If you have power at the starter with the button pressed it could be a bad starter. If no power at the starter then check into wiring and/or relays.
Does the engine crank over?
If you have no battery then you have no power.