18 amps.
To answer this question a voltage needs to be given.
A #8 copper wire with an insulation rated at 75 or 90 degrees C is rated at 45 amps.
This is a voltage drop question. To answer this question an amperage is needed.
A #14 copper wire with an insulation factor of 90 degrees C is rated at 15 amps. To answer your question for voltage drop at 200 feet a voltage needs to be stated. Assuming the voltage of 120 is used to maintain 15 amps at the distance of 200 feet a #6 copper conductor will limit the voltage drop to less that 3 percent. Assuming the voltage of 240 is used to maintain 15 amps at the distance of 200 feet a #10 copper conductor will limit the voltage drop to less that 3 percent.
18 amps.
Heavier wires do not necessarily mean better sound. Typically, 18 or 16 guage wire is sufficient for home audio systems. If you are going to be running extremely long distances, say 100 feet or more, then increase the gauge size to like 14 or 12 to keep from losing too much audio signal. In a car, 18 guage wire should be quite sufficient.
To answer this question a voltage needs to be given.
A #14 wire will do the job.
You have to know the maximum amps you wish to deliver or draw of the device or devices you wish to power. There are charts on the internet for wire gauges and distance that you can follow. For example: A 12 gauge wire will handle 20 amps safely for runs up to 100 feet. You go down 1 gauge for runs over 100 feet. So if you are running 175 feet at 20 amps you should use 10 gauge so voltage drops don't occur. Voltage has no effect on rated current output other than selecting a wire or cable that is rated for the working voltages. 20 amps at 240 volts is the same as 20 amps at 120 volts. As long as the wire is rated at 240 volts, it will carry 20 amps at voltages less than 240 the same.
#6 awg copper
A #8 copper wire with an insulation rated at 75 or 90 degrees C is rated at 45 amps.
8 gauge minimum, 6 is a good overkill and probably easier to find in the big orange box 10 gauge is sufficient at 50 feet. 10/3 SO cord should be easy to find.
The American Wire Gauge code table shows 8 gauge safe for 24 Amps, 10 Gauge for 15 Amps. If the circuit is going to be used at capacity (2400 Watts in this case), 8 or 10 gauge is the minimum, if load is constant, use 8 gauge. Voltage ability of the wire is dependent on the insulation thickness and material. So 20 amps at 120 Volts is 2400 watts of power, and 20 amps at 12 volts is 48 watts of power. Both would require the same gauge of wire, but the higher voltage would need better insulation. <<>> This is a voltage drop question. A #1 copper conductor will limit the voltage drop to 3% or less when supplying 20 amps for 500 feet on a 120 volt system.
30 amps is how much a 10-2 wire will carry at 110 feet. 10 gauge wire is only good for thirty amps per the national electrical code. Using 80% of the breakers usage you will actually be getting only 24 amps.
6 AWG will handle 50 amps with a voltage drop of about 4 volts. If you go to 4 AWG and limit to 50 amps your voltage drop will be 2.5 volts.
A #8 copper wire with an insulation factor of 75 or 90 degrees C is rated at 45 amps.