The standard amperage for an electric water heater is 18.8 Amps with 240Volts, 4500 Watt. A gas water heater in average uses less than 12 Amps with 115Volts (US and Canada).

## 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 40 gallon water heater use?

Depending on the code, a 2500w **heater** w/240v will draw 2500/240 or 18.75 **Amps** and either 25 or 30 **Amps**.

## How many amps does a 30 gallon electric water heater use?

The math shows that 5500 watt water heater is well within the safe maximum for a 30 amp breaker and 10 gauge wire. When heat exceeds circuit breaker rating, then the breaker trips. A 30 amp breaker with 10 gauge wire has 80% safe maximum = **24 amps**.

## What size breaker does an electric water heater need?

Electric hot water heaters typically require a dedicated **30-amp, 240-volt breaker**.

## 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.

## 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.

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

A 4500-watt element requires 10/2 wire and **a 30 amp (220volt) breaker**.

## What size breaker do I need for a 30 gallon 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.

## How many amps does a 20 gallon water heater pull?

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.