Water Heater Breaker Size Chart

Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.

Water heater breaker size chart. What is the right circuit breaker and cable for an electric water heater. Smith pro size sizing program is a tool that can be used to estimate water heater requirements for many common applications. Choose the right tankless electric water heater for you. Pro size is intended to assist in selecting water heaters or boilers that best meet the specific job requirements.

Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings. Of course pairing up the right circuit breaker according to the water heater demands is useful. An undersized breaker or same rating with load current breaker can trip and reset the circuit again and again. Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater.

But with a 25 amp breaker the 20 amp water heater will only cover 80 of the total capacity of the circuit breaker. Simply locate the appropriate water heater sizes on ecomfort using your information. Just follow the three simple steps below to choose the right model and size you need. Use the correct size breaker.

Multiply the current rating of the water heater with 125. An over sized breaker used for protection can damage the water heater or other connected appliances even leads to the fire due to overheat. A 1500 watt heater on a 120 volt circuit thus needs a breaker of 15 6 amps. So it will work consistently and in a stable way.

An acquaintance has an older mobile galvanized branch water lines and his water heater. In the above example we would require a 15 6 amp circuit breaker for our us readers. 40 gal 240v dual 4500w 18 75a connected to the circuit breaker panel double pole 40a breaker with a. 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.