If you're looking for a wire to cover all the areas use 10 guage. Very heavy but will handle most normal vehicle requirements except for extreme areas such as starter/battery cables (1 - 6 guage), and some stereo main amp feeds. You won't need 10 guage in a lot of applications (overkill) but it will cover most areas as I said. 16 guage is good for a lot of vehicle applications (lighting etc..). Check out the area of repair/installation and depending on the amperage needed you select you wiring. Below is a link to a chart you may find usefull. http://www.kayjayco.com/techPractical.htm
Sure you can use 14gage wiring for a 12V system. Assuming you are talking about the wiring commonly used in homes referred to as Romex cable. This cable is rated for up to 600V and can be used for any voltage under 600. However the problem you run into is 14gage Romex cable is rated for 15A regardless of the voltage. If you were to use it for a 12V system you would be limited to only 180W. Considering that most 12V light bulbs are 40W this would allow you to power only 4 40W bulbs on a 14gage circuit.
A 12 Gauge wire will handle approximately 20-26 Amps regardless of the voltage. Higher amperage can be attained by using wire with insulation that can handle higher heat.
Up to 9.3 Amps.
16 AWG.
At 120 Volts you would draw about 42 amps. At 240 Volts it would be about 21 amps. For 120 Volts you would need 6 AWG and for 240 Volts you would need 10 AWG.
10
ten gauge wire is used for high current circuits. in home wiring, 12 gauge wire is normally used. 12 gauge wire can carry a maximum of 20 amps. 10 gauge wire on the other hand, is larger and can carry more current. the maximum current capacity of a 10 gauge wire is around 30 amps. one would use this for a stove, hvac or other power hungry device's.
Wire is not sized by voltage. It is sized by current measured in amps. Some common copper wire sizes and their current capacities are: 15 amps -- 14 gauge wire 20 amps -- 12 gauge wire 30 amps -- 10 gauge wire 40 amps -- 8 gauge wire
12 guage wire israted for 20 amps and 10 guage is rated for thirty amps! 12 gauge is what is required, as it is rated for 20 amps. 10 gauge is rated for 30 and will be more then enough. Oversizing wire in your case isn't necessary. The thicker 10 gauge wire is harder to work with and will more then likely cost more.
30 amps.
10 gauge
AWG # 10.
10 AWG copper.
At 120 Volts you would draw about 42 amps. At 240 Volts it would be about 21 amps. For 120 Volts you would need 6 AWG and for 240 Volts you would need 10 AWG.
10 mm2 cross section should be sufficient (#6 wire?)
10 guage
10 gauge wire will only run up to 30 amps
Typically 30 amps.
10
12 ga, 20 amp. 14 ga, 15 amp. 16 ga, 10 amp.
ten gauge wire is used for high current circuits. in home wiring, 12 gauge wire is normally used. 12 gauge wire can carry a maximum of 20 amps. 10 gauge wire on the other hand, is larger and can carry more current. the maximum current capacity of a 10 gauge wire is around 30 amps. one would use this for a stove, hvac or other power hungry device's.