Final answer:
The amount of power required for a circuit is known as the electrical load and can be calculated using the formula P = VI.
Step-by-step explanation:
The amount of power required for a branch circuit, feeder, or service is known as the electrical load. Power is the rate at which electric energy is supplied to a circuit or consumed by a load. It is usually measured in watts (W) and can be calculated using the formula P = VI, where P is power, V is voltage, and I is current. For example, if a circuit has a voltage of 120 volts and a current of 5 amps, the power required would be 600 watts.