Water Heater Circuit Breaker Size

I agree with you that this water heater circuit is not a typical configuration and the common circuit for a new home is 10 copper wire protected by a 2pole 30amp circuit breaker however lets look at this application carefully.

Water heater circuit breaker size. This electrical wiring project is about changing the wiring for a water heater in a home. Cb size for 30a non contentious load. If you can plug the heater into a regular wall outlet the specified voltage should be 120 volts. Multiply the value for current by 125.

The size of a circuit breaker is measured in amperes. 24a 0 8 30a. A 1500 watt 120 volt plug in heater would need a 15 amp circuit with 14 gauge wire for temporary use. In the above example we would require a 15 6 amp circuit breaker for our us readers.

Electric garage heaters come in several sizes. An exact 100 rated for 30a circuit breaker can be used for 30a non continuous load. Unless the water heater nameplate says differently the heater draws 16 25 amps 208 volts. 16 25a x 1 5 24 375a the next size breaker is 25 amps.

Multiply the current rating of the water heater with 125. How is a water heater breaker size measured. A 5000 watt 240 volt heater would need a. In other words a load circuit having 24a the appropriate size of breaker would be.

For the water heater that shocker3218 is describing however it appears that the run current doesn t exceed the threshhold for the 30 amp breaker. You will find models that go from 25 amp up to the largest ones that can reach 100 amp. This way a 30a circuit can be safely used for 24a circuit.