# What size circuit breaker do I need for an electric water heater?

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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.

## What size breaker should I have for my hot water heater?

Electric water heaters require a dedicated 240-volt dedicated 30-amp circuit and a 10-2 non-metallic (NM) or MC cable. This means the breaker only powers the water heater and no other appliances. A 30-amp circuit breaker can power all 4500watt water heaters regardless of gallon size.

## What size breaker do I need for a 240-volt water heater?

A 240-volt dedicated circuit is needed for electric water heaters to work. A 30-amp double-pole breaker and 10-2 non-metallic cable are included in the circuit wiring.

## Can a water heater run off a 20 amp breaker?

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.

## Can I use a 40 amp breaker for a 30 amp water heater?

You just swap out a 30A breaker with a 40A breaker. You’re allowing the electrical system (not just the breaker) to run at 33% over it’s rated capacity.

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

The standard for water heater circuits is #10, two conductors with ground (10/2) and a 30 amp circuit breaker for a water heater. If you are running cable anyway, just run #10 and replace the breaker so it’s done right, once and for all.

## What size breaker do I need for a 40-gallon electric water heater?

A 40-gallon water heater should have an average 4500 Watt capacity and 240 V emf. Thus, a 25 or 30A breaker is sufficient for a 40-gallon breaker. However, for your safety, we recommend getting a 30A breaker.

## How many amps does a 240 volt water heater use?

Most electric water heaters use 18.8 amps with 240 volts and a 4,500 watt heating element. A gas water heater uses less amps—about 12 Amps with 115 volts. The average residential container heater has a 40-gallon tank and usually requires a 30-amp breaker.

## Does a water heater have its own breaker?

Electrical Usage

Any hot water heater, gas or electric, that has an electrical connection requires a breaker. … If this is the case, it is wired to its own circuit breaker in accordance with the National Electrical Code, article 220-30 for new construction or 220-31 for existing structures.

## What does a 240V breaker look like?

This breaker looks like two standard breakers stacked on top of each other, and therefore requires that two breaker positions be open. While the breaker provides this higher voltage, it operates as two linked 120V circuits. Each 240V circuit has two hot wires as opposed to only one.

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

30 Amp dual pole breaker and 10 Gage wire size are required for 4500 watt elements.

## Can I use 10 3 wire for a hot water heater?

All you need is 2 insulated conductors and 1 ground conductor. Since you have already bought 10-3 cable, I would just cap off the white conductor at both ends and use the red and black conductors for your hot wires and the ground conductor to attach to the green screw on the water heater.

## How many amps is a 3500 watt 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.