28 July
AWG - Wire Gauge Explained : 

Posted by Admin 

American Wire Gauge or AWG is a standardized unit of measurement mostly used in North America to record the diameter of most electrical wires. Increasing gauge number corresponds to decreasing diameter. The ampacity (number of Amps that a wire can handle) of a wire depends on the wire material, its insulation and temperature rating, electrical resistance, the voltage frequency and heat dissipation along with ambient temperature. There are calculators that can help size wires and take most of these variables into consideration. It is however more convenient to use a look-up table if the user is dealing with standard applications.

AWG chart

Below is a chart from https://www.bluesea.com/resources/1437 along with other related information.
Switches configurations

Voltage drop

At the power supply termination, the voltage measured at that point will be the same as the power supply voltage. A voltage drop is the reduction in supply voltage that occurs when the current is passed through the wire. The parameters that contribute to a voltage drop are the resistance of the circuit which is related to the length and gauge of the wire. The wire resistance impacts its impedance, resulting in a reduction in voltage. The more critical issue is that a reduction in voltage will often drive higher current at the load. This increase in current will cause more heat generation and could cause damage.
Voltage drop is more significant when using direct current and should be considered when working with long wires or low gauge wires. The most common solution to voltage drop is an increase in wire diameter.