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

The maximum allowable load for a 15-amp circuit in a residential setting can be calculated using the formula: Power (Watts) = Voltage (Volts) x Current (Amps). In Canada, most standard circuits operate at 120 volts. Therefore, the calculation for a 15-amp circuit would be:

Power = 120 volts x 15 amps = 1800 watts.

However, the National Electrical Code (NEC) recommends that circuits not be loaded to their full capacity to maintain safety and allow for any variations in load. It is common practice to use a maximum load of 80% of the circuit's capacity for continuous loads, which translates to:

1800 watts x 0.8 = 1440 watts.

This conservative approach helps to prevent overheating and potential fire hazards in electrical systems. Thus, the maximum allowance of 1440 watts aligns with this safety standard, making it the correct answer for the maximum allowable load on a 15-amp circuit.