Breaker Size For Electric Hot Water Heater

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What To Do If An Electrical Breaker Keeps Tripping In Your Home Home Electrical Wiring Electrical Wiring Electrical Breakers

What To Do If An Electrical Breaker Keeps Tripping In Your Home Home Electrical Wiring Electrical Wiring Electrical Breakers

The circuit wiring typically includes a 30 amp double pole breaker and 10 2 non metallic nm or mc cable.

Breaker size for electric hot water heater. Now in order to choose an electric breaker multiply the current draw of the water heater with 125 per cent in order to determine the size of the breaker you will need. If you can plug the heater into a regular wall outlet the specified voltage should be 120 volts. Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings. Some large heaters draw up to 50 amps requiring 6 gauge wire.

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. Thus the current draw for a 1 500 watt heater is 12 5 amps. Wire a hot water heater with wire that s sized to accommodate the heater s current requirement. Multiply the current rating of the water heater with 125.

So it won t work as effectively as it needs. For example a 20 amp hot water heater needs 12 gauge wire a 25 amp hot water heater requires 10 gauge wire and a 30 to 40 amp hot water heater requires 8 gauge wire. Just follow the three simple steps below to choose the right model and size you need. But with a 25 amp breaker the 20 amp water heater will only cover 80 of the total capacity of the circuit breaker.

Choose the right tankless electric water heater for you. For a tank style heater household size is a simple indicator of hot water needs. Electric water heaters require a 240 volt dedicated circuit which serves only the water heater and no other appliances or devices. First lets start with the nec code for this water heater application.

In the above example we would require a 15 6 amp circuit breaker for our us readers. Multiply the value for current by 125. Instead you need at least 25 amp. You can estimate the necessary tank capacity in gallons based on the number of people in the house.

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