Do you wonder what size breakers do you need handle your water heater? It’s a bit tricky. Before making that decision, you should consider a few things.

First, ensure that your water heater is appropriately sized for your home’s electrical system. Make sure the breaker can handle the power demand of your water heater. Can you use it? Read on to find out.

**Can you use 30 amp breaker for a water heater?**

**A water heater can be powered by a 30 amp breaker. However, You should consider some restrictions before purchasing. Additionally, the breaker’s load must not exceed 85% of its rated capacity. This equates to a maximum power output of 5500 watts. So, make sure the brakers meets the requirement.**

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A 30 amp breaker is sufficient to power a water heater in most cases. However, if you have an older home with insufficient wiring or your water heater is significantly larger than your electrical system’s capacity.

Then, you may need to upgrade to a higher wattage breaker.

**Can you use Single-pole 30 amp breaker for a water heater?**

In most cases, a water heater can be powered by a single-pole 30 amp breaker. However, it is essential to note that the breaker’s load must not exceed 85 percent of its rating capacity.

This means it can only handle a maximum of 2500 watts of power. Suppose your water heater’s wattage exceeds this limit. In that case, you’ll need to upgrade your breaker or buy an entirely new electrical system.

**Can you use a Double pole 30 amp breaker for a water heater?**

Most water heaters can be powered by a double pole 30 amp breaker. However, there are a few things to think about before switching to a double pole 30 amp breaker. First, ensure that your new breaker can handle the load that your water heater will generate.

Second, keep in mind that the breaker box might need to be relocated. Third, you must ensure that your wiring is following local codes. Fourth, double pole 30 amp breakers cost more than standard breakers, but they are more reliable.

**How many amp breaker for electric tankless water heater?**

**A 120 amp breaker should power most electric tankless water heaters.** However, the size of the amps may vary depending on the size and type of electric tankless water heater you use.

First, however, ensure that your water heater can handle the necessary amperage. Next, check the breaker box for identification to see how many amps it is rated for.

A 120 amp minimum capacity breaker should work perfectly fine in most cases if you follow specific steps when installing it in your electrical system.

**A 30 amp breaker should power most gas water heaters.** However, you may require more amps if your water heater has a higher wattage rating. You may also need to replace your current breaker with a higher amp electrical service panel.

**What amp circuit breaker to use for the water heater?**

When wiring your water heater, it is critical to use an appropriate amp breaker. An amp circuit breaker should protect each electrical circuit that supplies power to the water heater. Here are some examples of standard water heaters and their amp ratings.

**30-gallon water heater:**

A circuit breaker of **20 to 25 amps** is required for a 30-gallon water heater. And it operates on 120 volts. So, the breaker on a 30-gallon water heater must be at least 20 amps to keep your 15-20 gallons of hot water running for an hour.

**40 gallon water heater:**

In a 40-gallon water heater, you need to use **30 amps** of the circuit breaker. So 40-gallon water heater’s breaker must be a minimum of 30 amp to keep your 25 gallons of hot water running for an hour.

But on 220 volts, you can use 40 gallon water heater’s breaker with 20 to 25 amps.

**50 gallon water heater:**

A circuit breaker of **30 amps** is also required for a 50-gallon water heater. To keep your 30 gallons of hot water running for an hour, the breaker on your 50 gallon water heater must be at least 30 amps.

However, on 220 volts, you can use a 50 gallon water heater r’s breaker with 25 amps.

**3500 watt water heater:**

It would help if you used an amp breaker equal to or greater than the wattage of your water heater for a 3500 watt water heater.

For example, if you have a 3500 watt water heater and need a 30 amp breaker, you should use an amp breaker rated at **30 to 35 amps**.

**4500 watt water heater:**

If your water heater is 4500 watts, you must use a 30 amp circuit breaker. Because a water heater is a continuous load, **a 30 to 35 amp** breaker is recommended. You can also use a 25 amp circuit breaker without any problems.

On 220 volt, however, you can use a 30 amp to 35 amp breaker with any water heater.

**5500 watt water heater:**

If your water heater is 5500 watts, you must use a **35 amp** circuit breaker. Like with a 4500 watt water heater, a 30 amp to 35 amp breaker is recommended.

So, if you need to run a 5500 watt water heater at 30 amps and 220 volts, use these breakers rated at around 3850 watts.

**How to determine breaker size for water heater?**

You’ll need three types of breakers for a water heater: an amp breaker, a fuse box breaker, and a panel mount circuit breaker. It is straightforward to determine the size of a breaker. Here’s how you can go about it.

**Measure the distance between the terminals:**

Take a look at your breaker box and figure out how far apart the terminals are. There are many things you’ll need to know to find a breaker that fits your needs.

**Find the wattage of the heater:**

Use that number as a guide when you choose an amp rating based on the wattage of your water heater. For example, it might be 3 feet away from your water heater’s terminals, and you have a 5500 watt model.

If you need a 35-amp breaker, you’ll need one. On the other hand, if your breaker box is 10 feet away from the terminals and has a 3000-watt model, you should choose a 25 amp breaker to protect your home.

**Do some math:**

Here is a way to figure out the size of the circuit based on the wattage and voltage:

*Circuit Size(amps)= Wattage/Voltage*

For example, If you have a 4500 watt water heater and the voltage is 120, then the amps would be:

=4500/120

=37.5 or 35 amps

**How do I know what amp my breaker is?**

**A breaker’s size is permanently printed on it.** Examine it to see if there is any written ratting. If you do not find any ratting labels, they may have been lost or broken somehow. Find out the wattage of your breaker box in that case.

Then divide this wattage by the voltage needed to trip that breaker. However, if you have a newer model breaker, it is not guaranteed that the size of the breaker is printed on it. Check at least two websites to make things easier.

**Does a water heater need a separate breaker?**

**A separate breaker is not usually required for a water heater. **However, suppose the wattage of your heater exceeds the amp rating of your current breaker. In that case, you may need to upgrade to a higher amp breaker.

There are some instances where you may be able to replace your breaker. For example, you might be able to do it yourself if the breaker box is close to the water heater.

However, suppose your breaker box is located in a remote location or is difficult to access. In that case, you will most likely require the services of a licensed electrician to replace it.

**Final thoughts**

In summary, a 30 amp breaker can be used for a water heater; however, if the wattage of your water heater exceeds 30 amps, you may need to upgrade to a higher amp breaker. In addition, 30 to 50 gallon water heaters all require the same size water heater.