What is the maximum safe load for a standard 15-amp circuit?

The maximum safe load for a standard 15-amp circuit is derived from the relationship between amperage, voltage, and wattage, which can be explained using the formula: Watts = Amps x Volts. In typical household electrical systems, the standard voltage is 120 volts.

Calculating the maximum safe load involves multiplying the amperage by the voltage. For a 15-amp circuit operating at 120 volts, the calculation is as follows:

15 amps x 120 volts = 1800 watts.

This figure takes into consideration not just the total capacity of the circuit, but also adheres to safety standards, which typically recommend not exceeding 80% of a circuit's capacity for continuous loads. This results in a safe operational limit of 12 amps (80% of 15 amps), equating to 1440 watts for continuous use. However, for general purposes and with intermittent loads, 1800 watts is considered the acceptable maximum for a 15-amp circuit.

Knowing this, the choice stating 1800 watts accurately reflects the maximum safe level of load for a standard 15-amp circuit, making it the correct answer.