Breaker Size For 50 Gallon Water Heater

I want to put in a 40 50 gallon water heater for a 3bdroom 2 5 bathroom house.

Breaker size for 50 gallon water heater.

Smith 50 gallon proline power vent water heater available from supplyhouse has an fhr of 90 gallons so it will provide up to 90 gallons of hot water in an hour. 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. Some large heaters draw up to 50 amps requiring 6 gauge wire. What size breaker and size electrical line do i need.

12 40 unact 40 gallon tall ultra low nox natural gas water heater 12 year warranty. For example the a. In the above example we would require a 15 6 amp circuit breaker for our us readers. A 1500 watt heater on a 120 volt circuit thus needs a breaker of 15 6 amps.

Multiply the current rating of the water heater with 125 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. Wire a hot water heater with wire that s sized to accommodate the heater s current requirement. Current uef 9 40 unkct 40 gallon tall ultra low nox natural gas water heater 9 year warranty. Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater.

This was fine for these heaters but most modern heaters are 4500 watts. The breaker of the rated size will must trip if the water heater all of a sudden wants to draw more current than the amount it is rated for and the only reason the water heater would draw such excessive current is a malfunction that could be a fire hazard. Current uef 9 50 unkct 50 gallon tall ultra low nox natural gas water. They will trip a 20 amp breaker and if a 30 is installed using existing wire it ll eventually burn up the wire and likely start a fire.