Asked by: Yarissa Mare
asked in category: General Last Updated: 30th June, 2020

How many amps does an electric hot water heater use?

A water heater of this type is required to be considered a continuous load meaning that the branch circuit needs to be calculated at 125% of the heater's rated ampacity. 4500/240 = 18.75 amps, will work on a 20 amp OCPD but, 18.75*125% = 23.4 amps, requires a 25 or 30 amp circuit.

Click to see full answer.


Likewise, people ask, what size breaker does an electric water heater need?

Electric water heaters require a 240-volt dedicated circuit, which serves only the water heater and no other appliances or devices. The circuit wiring typically includes a 30-amp double-pole breaker and 10-2 non-metallic (NM) or MC cable.

Subsequently, question is, what size breaker do I need for a 40 gallon electric water heater? Your average residential 30 or 40 gallon water heater is 4500 watts and usually goes on a 30 A breaker.

Also to know is, how many amps is a 50 gallon electric water heater?

*IF* the elements in that 50 gallon water heater were only 3500 watts, then on a 240 volt circuit you would have 3500 / 240 = 14.6 amps, which is within the 16 amps of the 80% rating of both a #12 AWG copper circuit, rating of 20 amps, and the 20 amp rated breaker.

How many amps does a 6 gallon hot water heater draw?

16.7 Amps

30 Related Question Answers Found

What size breaker do I need for a 50 gallon electric water heater?

What happens if you wire a water heater backwards?

What size breaker do I need for a 4500 watt water heater?


Can you install an electric water heater yourself?

What size breaker do I need for a 3000 watt water heater?

What size breaker do I need for a 7500 watt heater?


What wire do I use for an electric water heater?

How much is a 50 gallon electric hot water tank?

How much does a 50 gallon water tank weigh full?


What size breaker do I need for a 5500 watt water heater?

How many watts does a 40 gallon water heater use?

Can I use a 40 amp breaker for a dryer?


Does an electric water heater require a disconnect?