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At 120 Volts your heater is drawing about 12.5 Amps. If your house only had 120 V then it would draw 13.6 Amps.

Problems could be

1.) Other devices on same circuit.

2.) Internal short in the heating element that reduced resistance and increased current.

3.) Faulty heater in that it really delivers more than 1500 watts because heating elements are less resistance than rating would require.

4.) Faulty breaker.

These are in order of likelihood. You are close enough to the limit of the breaker that it could be any of these things. Typically you should not exceed 80% of the breaker rating and that is just where you are operating.

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14y ago

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More answers

A 1500-watt heater draws approximately 12.5 amps, which is close to the 15-amp capacity of the breaker. If there are other appliances drawing power on the same circuit, it could easily trip the breaker. You may need to run the heater on a circuit with fewer devices drawing power to prevent overloading the breaker.

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9mo ago
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Q: Why does my 1500 watt heater consistently blow my 15 amp breaker fuse?
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