Electric Water Heater Wire Size

A tankless water heater albeit more expensive upfront will provide you with hot water no matter what.

Electric water heater wire size.

Wire a hot water heater with wire that s sized to accommodate the heater s current requirement. Electric water heaters require a 240 volt dedicated circuit which serves only the water heater and no other appliances or devices. Understanding water heater wiring. 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.

It is extremely important that the circuit be off when wiring an electric 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. Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings. In the above example we would require a 15 6 amp circuit breaker for our us readers.

My electrical wiring project involves change the wiring a water heater in the bathroom of a mobile home. Most home hot water heaters are powered by a 240 volt circuit. When placing multiple heaters on a circuit do not exceed the wattage listed for the corresponding wire and circuit breaker size. Just follow the three simple steps below to choose the right model and size you need.

An acquaintance has an older mobile galvanized branch water lines and his water heater. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. A conventional electric water heater will come with a black wire and a red wire which are connected to the wires of the same color as described above.

The circuit wiring typically includes a 30 amp double pole breaker and 10 2 non metallic nm or mc cable. At the water heater the black circuit wire connects to the black wire. Simply locate the appropriate water heater sizes on ecomfort using your information. Tankless units work by using built in coils to heat water when you need it meaning you ll always have hot water on demand.

2 1000w 1 1500w 240v heaters 3500 watts total. While all voltages are dangerous it is this particular voltage which is most notorious for causing severe injury or death. These 3 heaters would require 12 2 wire and a 20 amp 2 pole breaker if they were to all be placed on the same circuit. Choose the right tankless electric water heater for you.

The ground wire is attached to the green ground screw which is in the same wiring junction box compartment which is built into the top of the water heater.