Final answer:
The correct wire size can be determined by calculating the load of the circuit using the formula P = I²R, where P is power, I is current, and R is resistance.
Step-by-step explanation:
The correct wire size can be determined by calculating the load of the circuit. In order to calculate the load, you need to know the power dissipated by the load. The formula for power is P = I²R, where P is the power, I is the current, and R is the resistance. By plugging in the known values, you can find the power dissipated by the load.
For example, if you have a load with a current of 20.0 A and a resistance of 0.500 Ω, the power dissipated by the load can be calculated as follows: P = (20.0 A)²(0.500 Ω) = 2.00 × 10² W.