use 4 gauge spade crimp connectors
You need to know the current to determine the wire gauge.
Which wire is the power
Absolutely for maximum power transfer impedance's are to be matched a low wire gauge will insure that the power is not dissipated on the wire as appose in the speakers.
A good wire gauge for car radios is 18 gauge. This wire runs between the radio and its power supply from the vehicle.
16 Ga wire is smaller than 14 Ga. The answer is absolutely NO!
It is the ground wire for the fuel pump. The Red wire is the power wire for the pump. the dark blue is the signal wire for the gauge and the black is the ground for the gauge.
The neutral wire and power wire are never connected together.
Connect the sub woofer to the equalizer or amplifier. The positive wire will need to be connected to a power source. Connect the ground wire. Connect the auxiliary wire to the amplifier.
10-2 wire refers to 10 gauge, 2 conductor wire. Youshould use wire that is 10 gauge or larger (8 gauge, 6 gauge, 4 gauge, 2 gauge). The larger the wire, the more it will cost. most people install using the smallest size permitted, which in this case is 10 gauge. The are specifying the wire size to ensure that you do not connect the air conditioner to electric power using wire that is two small. If you are having problems with this type of question, you should consult an licensed electrician for help in connecting your air conditioner.
Amp always on
You need a 3 conductor #10 cable. A #10 wire is rated at 30 amps.
there is no ground in a car electrical system.