## What is the amp draw of an open hot water heater element?

Most electric hot water heaters are designed for 240 VAC. The de facto standard size heating element is 4,500 watts, which corresponds to **18.8 amps** and 12.8 ohms.

## Which element comes on first in an electric water heater?

top element

Each element has its own thermostat, and only one element runs at a time. **The top element** turns on first to start the warming process. Once the water in the top half of the tank reaches the set temperature, the top element turns off, and the bottom element turns on to heat the rest of the water.

## What would cause a water heater to not heat?

If an electric water heater is not producing hot water, it could be a simple problem like a **blown fuse or tripped circuit breaker**. Additionally, some electric water heaters have a circuit-style safety switch located near or on the thermostat.

## What should the voltage be on the bottom element of a hot water heater?

The meter should read somewhere **between 220 and 240 volts**. To test the lower thermostat, turn the top one to its lowest setting and the lower one to its highest setting. Touch one meter lead to the top screw and the other lead to the metal body of the water heater. The reading should be between 110 and 120 volts.

## How many amps will a 4500 watt 240V water heater element pull?

The answer to this is the exact figure you get when you convert 4500 watts to amps: 18.75. Since a water heater is a continuous load device, we need to multiply that value further by 125%. The result is **23.4 amps**. The right circuit breaker for this appliance with 4500 watts at 240 volts is either 25 amps or 30 amps.

## Does a hot water heater need a neutral?

**The conventional hot water heater does not need a neutral at the moment**. The neutral wires are included with the 4wire cord for 220 and 240 volt appliances that have electronic controls.

## Do both hot water heater elements come on at the same time?

**Only one element will come on at any one time**. This is known as a flip/flop system. On a 240 volt water heater, there will always be 120 volts to both elements. The thermostat will direct the second leg of the 120-volts to the element to complete the 240 volts required to energize the element.

## Will water heater only work on top element?

So, can you run a water heater with only one element? **Yes, a water heater can still run if the bottom element quits**. However, the water heater won’t run efficiently and likely won’t produce enough hot water to satisfy your family’s needs running on just the top element.

## How can you tell if a water heater element is bad?

**Steps on How to Test Water Heater Element**

- Step 1: Disconnect from the power source. …
- Step 2: Open the metal box cover. …
- Step 3: Detach the insulation. …
- Step 4: Confirm that the power is off. …
- Step 5: Locate the endpoint of the elements in the open panel. …
- Step 6: Note the reading of your water heater element.

## How do you check a water heater element with a multimeter?

Quote from the video:

Quote from Youtube video: *Now touch a lead to one of the elements terminals and the other lead to the second terminal. The meter reading should indicate 10 to 30 ohms of resistance if the component has continuity.*

## How do you test hot water heater element and thermostat?

Quote from the video:

Quote from Youtube video: *Then note the orientation of the power wires and disconnect them to isolate the thermostat from the circuit. Now touch one lead to the left side terminal on the reset portion of the thermostat.*

## How do you test a heating element with a multimeter?

**Touch one of the multimeter probes to the loosened screw.** **Touch the other probe to the other screw attached to the face of the heating element**. If the heating element is functioning properly, the multimeter should read between 10 and 30 ohms.

## How many amps does a 5500 watt water heater draw?

So, 5500 watts / 220 volts X 0.80 = **20 amps**.

## How many amps does a hot water heater need?

A gas water heater with a tank will require **30 amps** of electricity, which usually does not require any kind of modifications to the home’s electrical systemâ€“even for older homes with only a total 100- or 200-amp service. A tankless unit that runs on gas will require a 120-amp breaker.

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

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

## How many amps does a 40 gallon electric hot water heater draw?

For a 40-gallon heater, the average capacity is 4500 Watts with 240 Volts. Again, I = P/V; 4500W/240V = 18.75 amps. Then considering the continuous load (125% x 18.75A), we’ll get a total of **23.4 amps**. With our answer, a 40-gallon water heater needs at least a 25-amp breaker, the closest to the amperage value.

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

Keep the volts the same. **If the breaker is 30 Amp and the wire is 10 gauge, it’s okay to install higher watt up to 6000 on the heater**. If the voltage is the same, it’s ok to install lower watt.

## Can I use a 20 amp breaker for hot water tank?

But going by the NEC 125% rule, **a 20 amp is a risk of frequent tripping and could damage the water heater**. A 25 amp breaker is sufficient; however, most electricians will install a 30 amp circuit to provide room for electrical fluctuations as outlined above.

## Does a hot water heater need its own breaker?

Basically, **any electrical devices that need to work in order to protect your family, valuables, and property must be put on a dedicated circuit**. These include: Sump pump. Water heater.

## How many amps is a 50 gallon water heater?

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**.