# What Size Breaker For Electric Water Heater?

## 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 my water heater?

Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater. A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. Because a 15-amp breaker would be too small, you need a breaker with the next highest rating, which is 20 amps.

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## What size breaker do I need for a 30 gallon water heater?

The branch circuit needs to be calculated at 125% of the rated ampacity for this type of water heater to be considered a continuous load. In order to work on a 20 Amp OCPD, you will need a 25 or 30 Amp circuit.

## 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.

## How many amps does a 50 gallon water heater pull?

A typical 50 gallon electric water heater runs at 4500 watts. In an electric circuit of 240 volts, 4500 watts is equivalent to 18.75 amps.

## 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.

## What is the downside of an electric tankless water heater?

Tankless water heaters produce an endless supply of hot water, take up less space, have a lower risk of leaking, are safer, and have a significantly longer lifespan on average. The main disadvantage of tankless water heaters is their upfront cost (unit and installation) is significantly higher than tank-style heaters.

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

You cannot put a 40A breaker on #10 wire. If you are sure there is (at least) #8 wire all the way from the breaker to the water heater, you can just replace the 30A breaker with a 40A breaker, but if and only if you have verified the size of the wire throughout the entire circuit.

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## What size breaker do I need for a 20 gallon electric water heater?

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.

## What size of wire do I need for a 30-amp breaker?

RULES OF THUMB “Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”

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

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.

## Can I use 10 2 wire for a water heater?

Most water heaters are wired with 10-2 w/Ground shielded cable. For long distances you may need to go with heavier wire. When you use this type of wire both the white and the black will serve as hot conductors. The bare ground wire will also be connected to the neutral lug.

## How many amps does a 80 gallon water heater pull?

This should be checked out first. A water heater will only draw depending on the wattage of the element(s). So your WH has 2 – 4500 watt elements. When only one runs it is drawing about 22 amps (208 is nominal voltage which is what you have in your building) 4500/208= 21.6 amps.

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## Can I replace a 3500 watt water heater with a 4500 watt?

It is ok to install lower watt: replace 4500 with 3500 as long as voltage is same. Lower watt means less heat, so element can last longer.