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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.
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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WHY DOES MY blow heater keep tripping out your electrics?
Your blow heater may be drawing too much power, causing the circuit to overload and trip the breaker. It could also be a sign of a faulty electrical connection or a problem with the heater itself. We recommend having a qualified electrician inspect the heater and wiring to determine the exact cause of the issue.
Why will too many electrical devices operating at one time after blow a fuse or trip a circuit breaker?
The load exceeds the limit of the breaker or fuse. For example a 20 amp breaker on a 120 volt circuit will handle 2400 watts. Exceed that wattage and the breaker will trip or the fuse will blow.
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No, because if you switch a 50-amp load on, it will blow a 40-amp circuit breaker if the load exceeds 40 amps, which is likely.
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