You wouldn't change these voltages in a car. Please be more specific.
depends on voltage.... 120volt = 8.33 amps , 240volt = 4.17 amps
Your neutral May not be grounded good
NO. Don't try it. Some are designed to work on either, some aren't. If it won't work on 120v, it won't work on 240v.
120volt
yes
5 amps
no
power supply
2400 watts.
1200
just leave the neutral wire as it is and connect the other two !!
If the capacitor is charged then the battery will explode.