What Size Circuit Breaker Do I Need For A Hot Water Heater

This would be the perfect way to get a circuit breaker for your water heater.

What size circuit breaker do i need for a 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. Which size of water heater breaker to go for. Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater. Understanding water heater wiring.

Multiply the current rating of the water heater with 125. To determine the appropriate size of circuit breaker for single phase supply it depends on multiple factors like type of load cable material and environment temperature etc. This voltage in homes requires a double circuit breaker rated for the amperage draw of the hot water heaters. The general rule of thumb is that circuit breaker size should be 125 of the ampacity of cable and wire or the circuit which has to be protected by the cb.

If you need additional space in the panel for the circuit breaker then a quad circuit breaker may be allowed as specified by the make and model of the panel. 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. In this case you need no less than 35 amp.

Add up all the amps. Electric water heaters require a 240 volt dedicated circuit which serves only the water heater and no other appliances or devices. Voltage requirements most electric hot water heaters operate on 220 to 250 volts ac. You would need a circuit breaker that can handle 20 amps.

A tankless water heater will require a dedicated circuit as specified by the installation manual of the unit that has been selected. At the water heater the black circuit wire connects to the black wire lead on the water heater and the white circuit wire connects to the white wire lead on the water heater. The circuit wiring typically includes a 30 amp double pole breaker and 10 2 non metallic nm or mc cable.