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No, a breaker needs to be loaded less than 80 percent. As they reach their tripping point they get hot. The circuit rating, breaker and wiring is not designed for 21 amps. The next size would be a 25 to 30 amp breaker that has #10 wire feeding it.

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What size of breaker to use on a wall unit 220 heater?

The size of the breaker needed for a 220V wall heater depends on the current rating of the heater. Generally, for a 220V heater, a 20-amp breaker is common. However, it's important to check the manufacturer's specifications and local electrical codes for the appropriate breaker size.


Can you use 12-2 and a double 20 amp breaker to run a basebord heater rated at 4.2 amps and the thermostat rated at 17 amps?

Answer for USA, Canada and countries running a 60 Hertz supply service.The thing to consider here is the current rating of the baseboard heater. If the baseboard heater is 240 volt then yes you would need to use a two pole breaker. If you are using just one heater on the circuit, the current rating of the heater is low enough that you could use a two pole breaker rated at 15 amps and copper wire rated at #14 . The rating of the thermostat is the maximum that the stat will handle safely. With the combination you suggest you could run a total of 3800 watts of baseboard heaters. In amps this would be 16 and well within the rating of the stat.


What gauge wire and amp breaker do you use on a stove dryer and hot water heater?

For a stove, use a 8 or 6 gauge wire with a 40 to 50 amp breaker. For a dryer, use a 10 or 8 gauge wire with a 30 amp breaker. For a hot water heater, use a 10 or 8 gauge wire with a 30 or 40 amp breaker. Be sure to consult local electrical codes and guidelines for specific requirements.


What size breaker needs to be installed for 15000 watt 240 volt heater?

A 15000 watt 240 volt heater would require a 62.5 amp circuit breaker. To accommodate this exact load, you would typically use the next standard breaker size above 62.5 amps, which is a 70 amp breaker to ensure safety and proper operation of the heater.


Will it hurt to use a 40 amp breaker on a water heater the wire I was sold will not fit into the 30 amp on a sq. D circuit breaker?

In the United States, if the wire is #8 copper or larger (smaller number) it will work fine on a 40 amp breaker. If the wire is #10 copper, there is something wrong with the breaker if it does not fit. Pull the breaker out of the panel and look into where the wire terminates to see why the #10 wire won't fit.

Related Questions

Is it safe to use a 15 amp outlet on a 20 amp breaker?

No, it is not safe to use a 15 amp outlet on a 20 amp breaker as it can lead to overheating and potential fire hazards. It is important to match the outlet's amp rating with the breaker's amp rating for safety.


What size of breaker to use on a wall unit 220 heater?

The size of the breaker needed for a 220V wall heater depends on the current rating of the heater. Generally, for a 220V heater, a 20-amp breaker is common. However, it's important to check the manufacturer's specifications and local electrical codes for the appropriate breaker size.


Can you use 12-2 and a double 20 amp breaker to run a basebord heater rated at 4.2 amps and the thermostat rated at 17 amps?

Answer for USA, Canada and countries running a 60 Hertz supply service.The thing to consider here is the current rating of the baseboard heater. If the baseboard heater is 240 volt then yes you would need to use a two pole breaker. If you are using just one heater on the circuit, the current rating of the heater is low enough that you could use a two pole breaker rated at 15 amps and copper wire rated at #14 . The rating of the thermostat is the maximum that the stat will handle safely. With the combination you suggest you could run a total of 3800 watts of baseboard heaters. In amps this would be 16 and well within the rating of the stat.


What gauge wire and amp breaker do you use on a stove dryer and hot water heater?

For a stove, use a 8 or 6 gauge wire with a 40 to 50 amp breaker. For a dryer, use a 10 or 8 gauge wire with a 30 amp breaker. For a hot water heater, use a 10 or 8 gauge wire with a 30 or 40 amp breaker. Be sure to consult local electrical codes and guidelines for specific requirements.


What size breaker needs to be installed for 15000 watt 240 volt heater?

A 15000 watt 240 volt heater would require a 62.5 amp circuit breaker. To accommodate this exact load, you would typically use the next standard breaker size above 62.5 amps, which is a 70 amp breaker to ensure safety and proper operation of the heater.


240v nema6-50r outlet wired with 6 gauge wire and 50 amp breaker you need to run a heater with a nema 6-30p can you simply put a 30 amp receptical in place of the 50 amp receptical?

Not legally because the rating of the 30 amp receptacle would have a 50 amp breaker ahead of it. If you reduced the feed breaker to 30 amps and still use the #6 wire, this would be within the electrical code rules.


What best breaker rating for 1.5 hp air-con unit?

The breaker you use is determined by the size of the wire in the wall not by what is being connected to that circuit. If you have 14/2 wire then use a 15 amp breaker. If you have 12/2 wire then use a 20 amp breaker. The breaker protects the wiring not the item connected.


Will it hurt to use a 40 amp breaker on a water heater the wire I was sold will not fit into the 30 amp on a sq. D circuit breaker?

In the United States, if the wire is #8 copper or larger (smaller number) it will work fine on a 40 amp breaker. If the wire is #10 copper, there is something wrong with the breaker if it does not fit. Pull the breaker out of the panel and look into where the wire terminates to see why the #10 wire won't fit.


Is a 40 amp circuit breaker ok for a 30 amp air conditioner?

No, it is not recommended to have a circuit breaker with a higher amperage rating than the device it is protecting. In this case, you should use a 30 amp circuit breaker for a 30 amp air conditioner to ensure proper protection from overcurrent.


What size breaker to use for a hand dryer its 120v 20amps?

For a 120V hand dryer with a rating of 20 amps, use a 20 amp breaker to match the device's ampacity and prevent potential overloading or overheating issues.


What size breaker for a 1500 watt 120 volt heater?

To calculate the breaker size for a 1500-watt 120-volt heater, use the formula: Breaker size = Power (Watts) / Volts. In this case, 1500 watts / 120 volts = 12.5 amps. Therefore, you would need a 15-amp breaker for a 1500-watt 120-volt heater to allow for a safety margin.


What size circuit breaker do you need for a 7 amp appliance?

For a 7 amp appliance, you would typically use a 10 amp circuit breaker to provide sufficient protection. It is recommended to always use a breaker with a slightly higher rating than the appliance's current draw to prevent nuisance tripping and ensure safety.