just wow, 14 Ga wire should be plenty to run 20A of wire accross 8-10 ft - that will NOT be a heavy gauge cable. An inverter takes DC and converts it AC, typically 12VDC ot 110VAC. The fuse on the wire from the battery to the inverter is NOT to protect the inverter, it is to protect the car's electrical system. If you mount the inverter in the engine bay, make sure it is designed for that (read heat resistant and waterproof). In many cars, you may not have much room for it in the engine bay. You might also consider mounting a 110V plug somewhere in/on the dash or center console area for convenience.