How To Wire Water Heater

How to Wire a Hot Water Heater

What if I told you that the average lifespan of an electric water heater is between 10-15 years? That implies that if you reside in your home for a decade, you will almost certainly have to replace it and connect the wiring to the new unit as well. Installing an electric water heater is not a difficult chore, and it is one that you will perform on a regular basis throughout your life, so why not learn how to do it yourself? You may learn how to wire a hot water heater without the assistance of a professional in this section.

Do not take any chances, and if you are unsure about what is necessary throughout this procedure, seek the assistance of a specialist.

Check out this useful article for further information on general electrical safety.

How to Wire an Electric Water Heater

Before you begin, you must determine whether or not electricity is already being supplied to the location of the water heater. If you are replacing a gas tank with an electric tank, you will most likely need to run wire (2-pole, 30-amp breaker with 10-2NM cable) from the circuit to the tank to complete the installation. If the circuit breaker has already ran a line to the position of the water heater, you can go to step 1. Otherwise, proceed to step 2. One more point to remember before we begin: do not fill the tank with water until the tank has been entirely wired, and do not switch on the circuit until the tank is completely filled with water.

Wiring a Hot Water Heater in 7 Steps

  1. Remove the cover from the junction box, which is most likely located on the top or side of the water heater. Most likely, you will only need to remove one screw in order to reveal two lead wires and a ground screw
  2. However, this is not guaranteed. Check the voltage- Never work on any electrical components without first ensuring that there is power to the device being repaired. If there is power present, the circuit is referred to be “live.” Please use caution! Performing wiring manipulation while the electricity is still running would not only violate the warranty, but it might also result in serious physical injury. If you are unsure whether you have a live circuit or not, it would be a good idea to use a voltage meter to verify whether there is electricity flowing through the lead wires of the circuit. If you discover that there is electricity, turn it off. This can be accomplished by tripping the GFCI breaker in the plug, if one is present (push the “TEST” button located in the center of the outlet). As a last resort, locate the relevant breaker in the power supply breaker box and turn it off. Remove the knockout- you will discover a knockout within the junction box, which you will need to remove. You may get rid of it by using needlenosepliers. Remove the wire insulation- if you installed the cable yourself, you may need to remove the plastic sheath in order to expose the wiring. Remove the wire insulation- ” (you need about 6″ to go within the junction box). After that, remove approximately 0.75 inch off the top “in the absence of insulation between the separate wires Fish the wiring- feed the wires through the ROMEX connector, then tighten and clamp the connection over the encased section of the NM cable (see illustration). There should be no exposed wires remaining on the premises. Pass the wires through the knockout, and then secure the ROMEX connection in place using a lock nut to prevent it from moving. Tip: Make sure that the Romex connector does not come into contact with any water pipes. You don’t want the temperature of the hot water outlet to interfere with your electrical work, so be sure it isn’t too hot. In order to connect the water heater to the circuit, you must first wrap the ground wire around the ground screw in the junction box and tighten it down. Connect the black wire from the circuit to the water heater, as well as any other wires from the water heater (twist together and secure with a wire nut). Take the white wire (the “hot” line) and wrap electrical tape over it to protect it from the elements (this is for identification purposes). This should be done at the breaker panel as well. After that, connect the white wire to the other wire that is located within the water heater. Replace the junction box cover—this is, in essence, the final stage in the process. Fill it with water and then re-energize the circuit breaker, and you’ll be able to use your new water heater.

Thanks for Choosing the Plumbing Experts

We appreciate you taking the time to visit us at PlumbersStock.com. Contact us if you have any queries concerning the wiring of your water heater or if you need any assistance. Remember, we sell well-known brands such as Bradford White, Takagi, Stiebel Eltron, and others. Purchase replacement components and water heater accessories from a variety of sources. Resources that are related to this topic include: Installing a Gas Water HeaterInstalling an Electric Water HeaterHow to Install a Gas Water Heater Soldering Water Heater Pipes – Step by Step Instructions Installing a Water Heater Expansion Tank is a simple process.

How to Install an Electric Water Heater

Installing a new electric water heater can allow you to save both money and electricity. How to do it is demonstrated in our video and step-by-step instructions. Please keep in mind that product pricing, availability, and item numbers may differ from market to market.

Before You Begin

Examine your water heater to see whether it need replacement or if routine maintenance would suffice. There might be a problem with the heating element or another type of maintenance issue if you are not getting hot water. Before committing to a complete replacement, conduct a brief maintenance inspection. If you have water on the floor or on top of the unit (as opposed to water leaking from a supply line above the unit), you’ll most likely need to replace your water heater as soon as possible.

A excellent time to think about upgrading or reducing your electric water heater is when your family’s size has increased or decreased.

If you’re not confident in your ability to complete water heater installation, hire a professional.

Caution The water pressure in your house is critical for all of the equipment that use water. A decrease in pressure reduces the stress placed on plumbing systems and helps to increase the lifespan of appliances and fixtures.

Water Pressure

The water pressure in your house is critical for all of the equipment that use water. A decrease in pressure reduces the stress placed on plumbing systems and helps to increase the lifespan of appliances and fixtures. Check the water pressure in your house by attaching a pressure gauge to an exterior spigot. The optimal PSI ranges from 50 to 60 PSI. if the water pressure in your house is more than 80 PSI, use the pressure-reducing valve located near the main water shut-off to decrease the pressure.

If you don’t already have a pressure-reducing valve in your house, a professional can install one for you.

Expansion Tank

Decide the type of expansion tank you’ll require. It is possible to reduce surplus pressure in the lines of a closed system using thermal expansion tanks. A 2-gallon expansion tank can be used with water heaters that hold up to 50 gallons of water. For water heaters that hold up to 100 gallons of water, a 5-gallon expansion tank should be used. For for size information, see the manufacturer’s instructions. In most cases, the expansion tank is connected to the cold-water supply pipe near or above the water heater.

They simply slot into the pipe without the need for soldering.

Soldering paste should be applied to both the pipe and the fittings before assembling.

In order for an electric water heater installation to be functional, the pressure in the expansion tank must equal the pressure in the main water supply.

Removing the Old Water Heater

Decide the type of expansion tank you’ll require first. It is possible to reduce excessive pressure in the lines of a closed system using thermal expansion tanks. When used with a water heater that holds up to 50 gallons, a 2-gallon expansion tank will suffice. For water heaters up to 100 gallons, a 5-gallon expansion tank should be used. Sizing should be determined by the manufacturer’s guidelines. This tank connects to the cold-water supply pipe that is located near or above your water heater.

The fittings just slot into the pipe; there is no need to solder them in!

Soldering paste should be applied to both the pipe and the fittings before assembling the set of parts.

In order for an electric water heater installation to be functional, the pressure in the expansion tank must equal the pressure in the main water system. In order to raise pressure, a hand air pump should be used, or the valve should be depressed to reduce pressure.

Preventing Scalds

Even with the temperature gauge set at 120 degrees, the risk of scalds remains a possibility. Children, the elderly, and individuals with delicate skin are particularly at risk of developing skin cancer. Consider adding thermostatic mixing valves to keep people safe from being hurt. Installed at the point of use faucet, fixture, or appliance, a thermostatic mixing valve regulates both the volume and temperature of water by connecting to both the hot and cold water supply lines at the same location.

How to Wire Water Heater

In order to properly wire a water heater, you must first ensure that the water heater is receiving adequate electrical power. In most cases, an electric hot water heater will require a dedicated 30 amp, 240-volt circuit breaker. Your water heater’s power supply wire will most likely be a 10/2 Romexcable that runs from the breaker panel to the heater (Blk wire- hot, Marked White wire – hot, Barecopper wire – ground). Because a water heater does not have an outlet, a cable will be extended from the wall to the junction box on the water heater to complete the circuit.

Note: Do not fill the tank with water until the water heater has been connected, and then do not switch on the circuit until the tank has been completely filled with water.

  1. The wiring for an electric water heater should already be on the premises if you are replacing one. If you are switching from a gas to an electric water heater, you will need to wire a dedicated 30-amp circuit and 12-2 Romex to the location of your water heater
  2. The junction box cover, which may be found on the top or side of the water heater, is where the electric connections are made. Remove the screw and cover it with a cloth. Internally, there should be two leadwires and one ground screw
  3. Remove the cutout on the junction box and attach your flexconduit, leaving approximately 6 inches of wire hanging out the bottom of the box. Avoid allowing the flex conduit to come into touch with the water pipes. As a result, heat can be transferred from the hot water pipe to your conduit, and wires do not appreciate the added heat.
  1. Wrap the ground wire around the ground screw in the junction box and tighten it down firmly to ensure it is secure. Once you’ve done that, take one wire from the water heater and one wire from the feed circuit and twist them together (it doesn’t matter which wire you use). A wire nut is used to hold them in place. Wrap electrical tape over the insulation of the white feed wire coming from the panel in order to distinguish it as a current-carrying line (thesame should be done at the breaker panel as well where the whitewire ties into the second hot pole of the 240V breaker ratherthan the neutral bus). Once the white wire has been tagged, connect it to the other wire in the water heater in the same manner as you did with the black wire. It is important to note that because the hot water heater is a 240-volt device, it does not require a neutral wire to operate. As a result, the white wire is really considered a “hot” line in this application
  2. The next step in figuring out how to wire a water heater is to replace the junction box lid. Turn on the water supply and fill the tank halfway with water until it is completely full. Turn the circuit breaker back on once the container is completely filled with water. Because of this, if there isn’t any water in the tank when you switch on the heater, the heater element might soon overheat and get damaged.

Tighten the ground wire around the ground screw in the junction box, making sure it is properly fastened in place. Afterwards, twist together the black wire from the feed circuit and one wire from the water heater (it doesn’t matter which wire you use). A wire nut can be used to hold them in place. Wrap electrical tape over the insulation of the white feed wire coming from the panel in order to distinguish it as a current-carrying conductor (thesame should be done at the breaker panel as well where the whitewire ties into the second hot pole of the 240V breaker ratherthan the neutral bus).

It is important to note that because the hot water heater is a 240-volt device, it does not require a neutral wire to function properly.

The final step in learning how to wire a water heater is to replace the junction box lid.

Water should be pumped into the tank from the mains supply. Turn the circuit breaker back on once the tank is completely filled with water. Because of this, if there isn’t any water in the tank when you switch on the heater, the element might soon overheat and get damaged.

How To Wire A Hot Water Heater: An Ultimate guide

Please keep in mind that this content may contain affiliate links. This means that, at no additional cost to you, we may gain a small profit on purchases made via our links. After installation, the new heater will provide you with service for up to a decade before it has to be replaced. Now is the time to be ready and become familiar with the procedure before you begin.

See also:  How To Adjust Temperature On Electric Water Heater

Step By Step Guide For Wiring a Hot Water Heater

Immediately before you begin working with all of the essential wiring, you must first gather all of the necessary tools and equipment for the job. It is a vital component of this procedure since failing to include one of the components will result in you having to start over. Before you go out and buy a water heater, do some research to find out which one will satisfy all of your requirements. Only by purchasing the suitable heater will you be able to receive comprehensive servicing. You may go online for numerous buying tips on the best house water heaters to buy and then choose one that suits all of your requirements and budget.

Unless you remove the previous version, you will not be able to continue the procedure.

These are some examples:

  • Screwdriver, wrench, pipe cutter, dielectric connections, voltage testers, flexible hoses, sandpaper, and other related tools

With the help of these tools, you can now learn how to wire a hot water heater in your house without the need for specialized knowledge or support. The following are some of the steps you will take:

1. Disconnect the water heater from the electric source

Before you even begin to fiddle with the old heater, be certain that there is no electric current flowing through it to avoid being shocked. Neglecting to take this precautionary measure might result in serious consequences. It is best not to listen to all of those macho DIY manuals who operate on the heater without first turning it off at the circuit breaker. When it comes to wiring your electric heater, safety must always come first at every stage of the process. After you have turned off the electricity, use a voltage tester to see whether there is still any voltage going to the heater.

2. Drain all hot water

Continue by opening the faucet and allowing the hot water to flow out to drain any remaining hot water. The water must be allowed to drain until it becomes cool. In this phase, you will empty the hot water tank safely and without putting yourself in danger in the procedure. Keep in mind that the water in the tank is boiling hot, and you must always put safety first when working on any DIY project. After you have experienced the chilly water, turn off the water supply to the tank. The majority of the time, the supply valve is located at the top of the hot water tank.

Connect a hosepipe to the drainage valve and allow the water to flow into an outside tub for further safety. Additionally, open the hot water valve to aid in the draining of the tank and to expedite the procedure.

3. Disconnect all the wiring on the old water heater

The third stage in the process of wiring a hot water heater is to disconnect all of the electric wiring that is connected to the top portion of the hot water tank. Disconnecting the cables ensures that you may securely remove the old heater and check for any wires that need to be replaced immediately after removal. A tester should be used to determine whether or not there is an electric supply to the heater once again. When disconnecting the cables, there should be no need to switch on the circuit breaker, right?

Furthermore, mark all of the cables as you disconnect them to make your job easier later on.

To make this easier, label the wire and snap a picture of it before starting to disconnect it are both good options to consider.

4. Disconnect all the piping system

Before disconnecting the hot water tank piping system, make sure it is in good working order. It is a necessary step in the process of wiring a hot water heater. Copper pipes may need to be removed from the system if any of the pipes utilized are made of this material. Other materials, on the other hand, are more comfortable to remove from the tank. Remove the pipes that are attached to the tank using a wrench and inspect them for any that need to be replaced. If they are in good shape, you may save money by reusing them when you install the new water heater, which will save you money.

5. Install the new hot water tank

After you’ve disconnected the wiring and pipes, you may securely remove the old water heater from the house. Before installing the new water heater, you may check to see if there is anything else that needs to be replaced on the entire system before proceeding. Because the water heater is large and heavy, it should be moved with the help of a wheelbarrow or other moving equipment. If the load is too large, you can ask for help to avoid injuring yourself while attempting to lift it on your own.

Also, perform any necessary basic repairs to the space before proceeding with the installation of the new tank.

If they don’t, you may have some further work to perform before you can connect the new hot water heater to the electricity.

Make use of construction pieces that are more energy efficient, more inexpensive, and easier to put together at home.

Once the platform is in place, the next step is to erect the new tank on top of it. When constructing a platform, take into consideration the height of the tank and the location of wiring. Additionally, piping is a key aspect to keep in mind.

6. Sand the copper pipes

Remember the sort of pipe that was used in the old water heater and prepare appropriately at this point. All copper pipes must be sanded before they can be used in the new tank installation. Using as much sandpaper as possible, polish the pipes until they are gleaming.

7. Wire in the new water heater

The new hot water tank should have been installed by now. The next step is to learn how to wire a hot water heater in your home. Remember, the procedure is straightforward and does not necessitate the use of a professional’s services at an additional cost. Take precautions and follow the instructions in this guide to get great outcomes. Remove the shell from the junction box on the new water heater in order to have access to the wiring. A green screw ground will be visible on the heater, and here is where you will attach the ground wire as the first stage in the wiring process.

  • After that, look to see if you can see a knockout on the tank’s uppermost section.
  • You can cut it with a pair of pliers if you have them.
  • It is preferable to complete this step by twisting and gaining access to the other wires.
  • This is the point at which the significance of shooting these photographs becomes apparent.
  • Remember, though, to ensure that all of the wires are correctly connected before closing the junction box.

8. Attach all the pipes on the new water heater

It’s time to rejoin all of the pipes after you’ve mastered the art of wiring a hot water heater. It is necessary to reconnect the pipes that supply hot and cold water to the water heater at this point in order for it to work properly. Check all of the inlets and reconnect them as necessary. If the cold water intake is just connected to the cold water supply pipe, for example, the installation is complete. The similar procedure is used with the hot water pipes. At this stage, you must take extra precautions to ensure that the two do not become mixed.

  1. You should have copper pies on the old one, and you should have them on the new one you’re installing as well.
  2. Obtain hoses that are well-known for their flexibility in order to connect heater nipples to water supplies as well.
  3. Additionally, they are simple to replace and are cost-effective.
  4. Once you have finished attaching everything, double-check your work before moving on to the next step.

If you notice any leaks, you should address them first before continuing with the project. After you have repaired all of the leaks, you should allow the water to flow until it completely fills the tank.

9. Temperature and pressure discharge valve installation

At this point, the process of wiring a hot water heater does not appear to be as difficult as it formerly was. You’ve come this far, and you’re now in the last stretch. Another critical phase in the process is the connection of the discharge pipe. Purchase a discharge pipe and place it on the new water heater, making sure that the pipe’s end does not protrude too far beyond the floor. The proper measurement is approximately 5 inches from the bottom of the container. The temperature and pressure pipe/valve is a critical component of all water heaters, and it is responsible for extending their service life.

  1. The pressure in the hot water tank can rise to dangerous levels, and it must be released immediately to avoid an explosion.
  2. Check to make sure the valve you receive is the proper one for your water heater before installing it.
  3. The user manuals that come with both of them will provide some insight into whether or not they are compatible.
  4. Keep in mind that it must be at the proper height from the floor in order to operate properly.
  5. After that, you may remove the temperature and pressure valves and wrap all of the threads with plumbing tape as an added measure of safety.
  6. Once that is completed, reinstall the valve on the tank and tighten it down with a wrench to ensure that there are no leaks.
  7. You may now screw on an adapter and make sure that the threads are covered with plumbing tape because the pipe is now the right length for the job.

10. Switch on the power

As soon as you’ve completed the job, it’s time to put the entire heating system through its paces. It will assist you in determining whether or not you have mastered the art of wiring a hot water heater. Electricity is required for the new hot water heater at this point, and this is critical. Hot water heaters are rather specialized in that they require a circuit that is capable of handling 220 volts. In addition, you’ll need a 10/2 cable for the circuit as well as a circuit breaker with a 30amp rating.

Turn on the power supply by turning on the circuit breaker once you’ve filled the hot water tank and wait to see what happens!

It’s important to remember that you should never switch on the hot water heater if the tank is not completely full of water.

If the water is becoming hot and everything appears to be working properly, you have successfully installed a hot water heater. If this is not the case, turn off the circuit breaker and examine the wiring.

Hiring a Professional vs DIY

With the help of this instruction, you will be able to wire a hot water heater on your own. Nonetheless, for other people, this may be a time-consuming process, and they would prefer to hire a professional. A DIY project needs a significant amount of effort and a basic understanding of electrical wiring. If you have the time, you can save money by doing it yourself. If this is the case, do not rush the job. It is preferable to employ a specialist and ensure that the heart is properly fitted. However, knowing how to finish the entire procedure on your own is a terrific confidence builder as well as an opportunity to acquire some new skills in the comfort of your own home.

FAQ

Yes, it is possible to obtain it with minimum side effects. It is possible to connect a 220v heater backwards if the heater includes red and black wiring. In order to avoid water polarity concerns, you must verify that the hot water heater is properly wired in as much as is practicable.

How many wires on average does a water heater need?

An 8-gauge cable is required for a water heater rated at 30 amps. The gauge readings change based on the amplified signal.

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

You can use a 10 3 hot water heater, but you should be aware that it does not have any grounding.

Does a hot water heater need a ground wire?

A ground wire is required for a hot water heater, to be sure. It is a potentially dangerous equipment, and you must ensure that all safety protocols are followed in order to avoid mishaps. Electric shorts are conceivable from time to time owing to inadequate wiring, which can be life-threatening for everyone who uses the heater.

Conclusion

It is not as difficult as it appears to learn how to wire a hot water heater in the comfort of your own home. However, it is not a procedure to be undertaken lightly, and great attention should be exercised when carrying out the installation. In order to avoid any mistakes that may be life-threatening, safety must always come first at every stage of the installation process.

How to Wire a Hot Water Heater to Breaker Box in 8 Steps

You’ve probably noticed that the rust in the critical regions of your water heater’s tank is starting to grow up. Do the obvious symptoms of wear and tear have an impact on the performance of your heater? If you answered yes, you must replace the gadget as soon as possible. A basic understanding of how to connect a hot water heater to an electrical panel is required. In most cases, you’ll need to use clean wiring when connecting your hot wires and ground wire to their proper positions within the heater and the circuit breaker.

See also:  When To Flush Water Heater?

What You Will Need

It should not be difficult to obtain the remaining materials if your electric water heater replacement has already been purchased. Before you begin wiring an electric water heater, make sure you follow the instructions in the list below and that you have the necessary sizes.

1. Circuit breaker

When water heaters degrade or when the amperage requirements of a new water heater change, it is critical that you replace your breaker. A standard 30- to 40-gallon water heater is compatible with a 30 or 40-amp electrical supply.

Most homeowners choose 30-amps for their boiler tanks because it has the capacity to accommodate the ampacity of a water heater, including its maximum continuous load. Check the specifications of the replacement heater, however, to ensure that it will not cause a conflict with your breaker.

2. Electrical wires

The wiring for your water heater should be compatible with all of its components and safety devices, much as the wiring for your circuit breaker. A10 American Wiring Gauge is the appropriate wire gauge for water heaters since the common breaker size for water heaters is 30 amps (AWG). A 10-2 Non-Metallic Cable (NMC) is recommended for a 30-amp, 240-volt circuit, according to my recommendations. This type of wire is made up of two conductors and a ground, for a total of three wires in this configuration.

Each wire is black, one is white, and one is copper in color.

I strongly encourage you to label the wire with tape before you begin the task so that you will remember that it is a conductor.

3. Voltage tester

As a do-it-yourselfer with a basic understanding of how to wire a hot water heater, you should take personal responsibility for your own safety. A voltage tester or meter is an essential tool for protecting oneself from dangers such as accidentally touching a live wire without realizing what you’re doing. If there is no current, it will inform you with a simple flashing bulb method: green light for “no current,” red light for “live wire.” You’ll be ready to go as soon as you put this equipment together with body insulation such as rubber gloves and boots.

Steps on Wiring Your Water Heater to Breaker Box

Continue with the wiring of the hot water heater to the breaker box once you have properly assembled all of your tools. As previously stated, if you are unsure about what you are doing, it is preferable to spend a few dollars on a professional rather than jeopardizing your life or the lives of your loved ones.

Step 1: Shut off the primary sources

Shutting off the main source of electricity should be the first step in any electrical repair procedure, as it should be in all situations. This method is required in order to be able to work freely with the wires without the danger of causing electrical problems. Alternatively, you may conserve water by turning off the main water supply line that supplies your home’s plumbing.

Step 2: Drain the excess water and depressurize

Shutting off the primary source of electricity should be the first step in any electrical repair procedure. Because of the potential of electrical risks, this technique is required in order to have a free hand with the wires. Turning off the main water supply line that supplies your home, on the other hand, helps to preserve water.

Step 3: Install the circuit breaker

Shutting off the major source of power should be the first step in any electrical repair procedure, as it should be in all situations. This process is required in order to have complete control over the cables without the possibility of electrical risks. Turning off the main water supply line that supplies your home, on the other hand, will help you save water.

Step 4: Run the wirings

Make a plan for how you will route your wiring from the breaker box to the Electrical Metallic Tubing (EMT) or electrical flex that will connect to the water tank. Fasten your cables to the wall or to the ceiling (if necessary) with a conduit fastener to keep them neat and tidy.

For a better understanding of the connection between your breaker and the heater, you might consult an electric hot water heater wiring diagram. If, on the other hand, the earlier wirings are still in good condition, you may omit this step.

Step 5: Wire in the circuit breaker

Connect the wire with a gauge of 10 AWG to the circuit breaker. Remove a little piece of the cables from their bundles. Don’t forget to leave a sufficient length of wire and avoid cutting it all the way through. Begin connecting the hot wires on both poles of the CB by connecting them together. After that, screw in the ground wire to the appropriate location.

Step 6: Wire in the water heater

Connect the wires from the Electrical Metallic Tubing to the opening in the water heater’s junction box by fishing them through the hole. Strip the insulation for approximately.75 mm once you have secured your wires through the junction cover. Ensure that your wires pass through the ROMEX connection and that the NM cable’s sheath is clamped. Connect the ground wire to the ground screw on the interior of the junction box to complete the circuit. The black wire of your circuit should be wrapped tightly around a water heater wire to complete the twisting (you can pick any wire you want).

Locate the white wire on your panel and mark it with tape (to signify its status as a hot wire).

Step 7: Open the main pipe and fill the tank

Make certain that everything, from the PVC pipes to the electrical cables, is properly sealed, whether inside or outside the junction box. First, turn on the water supply and fill the tank with water before turning on the electrical heating element. After that, depressurize the pipes by running all of your faucets for three minutes at a time.

Step 8: Turn on the main breaker box

Turn on the main electrical panel as well as the circuit breaker that is allocated to the water heater. To ensure the safety of your tank, utilize the voltage tester to discover any electrical leaks that may exist outside the tank. Metal elements such as junction covers and screws are subjected to inspection. Always check the water heating element, the top of the tank, and the bottom of the tank, to name a few reminders. In the worst-case situation, if frozen pipes develop, the heating element will continue to operate even if the water supply is low.

If you want a replacement, be certain that everything is identical to the prior configuration.

Conclusion

Did you have a good time while reading this tutorial? It is not as difficult as you may believe to understand how to connect a hot water heater to a breaker box. You’ll be alright if you match the breaker and wiring diameters to the electrical information on your tank, which you should do. For the record, if you are not comfortable with electrical wiring or plumbing work, contact a reputable professional immediately. Tell us what you think about this story in the comments section. You can express your thoughts and questions in the comments section below, and we will address them.

How to install electric water heater

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XXStainless pipe, elbow and nipples corrode in softened water Use 6 wraps teflon tape on threadsBuy:Stainless nipples at AmazonStainless elbows at Amazon
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✔ Fill tank with water Open bathtub tap on hot side. When water runs fuull stream, then water heater is fullIllustration shows gate valve and ball valveRotate valve counter-clockwise to turn water ON✔ Check for leaks/re-inspect periodicallyBuy:ball valve/ water3/4″ ball valve at AmazonBrass ball valveBuy:Ball valve/ gasGas ball valve
Tank must be full of waterTest elements ✔ Tank must be full of water -or- elements burn out Fill water heater tank before turning circuit breaker ON,.Turn water ON. Open bathtub spout. Wait for full stream of water. Turn bathtub OFF. Lift TP lever for moment to bleed last of air from tank. Tank is full of water. Turn circuit breaker ON.Resource:How to test element
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✔Tank must be full of water BEFORE power is ON✔ Push breaker fully OFF and then fully ON If breaker is faulty, more wires to another same-size circuit breakerResources:Troubleshoot new electric water heaterWater heater is tripping breakerHow to replace circuit breakerChoose correct wire and breaker sizeFigure volts amps and watts for water heaterNew water heater making noise
Larger image ✔ Push reset button located on upper thermostat, If water heater does not make bubbly fizzing soundPut ear against tank and listen for bubbly fizzing sound✔ Expect 19 gallon hot water per hour of heating240 volt 4500 watt element heats
✔ Suggest: Wrap water heater with insulationSave $2-8 per month Do not cover TP valve or discharge tubeInsulation blanket can cover entire electric water heater, including electric wireLeave access for drain valveMarathon water heater manual says not to cover top of tankBuy:Water heater insulation blankets at AmazonResources:See illustrationDept of energy resource
✔Suggest: Insulate pipesSave 25 cents – 1 dollar per monthx 30 years = $90-180Insulate pipes at water heater and rest of houseWater pipes lose heat. When colder water enters tank, it must be heated more.Pipes on top of tank draw heat out of water heater. Tank runs more.Gas water heater: Insulation must stay away from top of heater and vent pipe.Electric water heater: Insulation can cover all pipes and top of water heaterBuy:Pipe insulation at Amazon

What Are Some Basic Tips for Wiring Electric Water Heaters?

In most regions, a permit is required for the replacement of an electric water heater, regardless of whether the installation is carried out by a professional or by a homeowner. As part of the permit procedure, an inspector will check the work to ensure that the electrical and plumbing connections are made properly and safely, and that the installation conforms with the requirements of the local building code. We will only cover the fundamental electrical needs for a regular tank-style electric water heater, not an on-demand (tankless) water heater, in this section.

In the event that you want to replace an existing electric hot water heater, now is the time to check to see if the original water heater wiring is still in good working order.

Turning off the Power

Make sure that the circuit that supplies the water heater is turned off before you check or touch any of the wiring or electrical connections on the water heater. In the majority of circumstances, a 30-amp, double-pole circuit breaker is used to protect the circuit. Switch off the relevant breaker in the breaker box, and then test the circuit at the water heater using an electrical voltage tester to ensure that it is not still active on the circuit.

Locating the Electrical Connections

When installing a water heater, the electrical connections are made at a junction box that is constructed into the water heater tank’s uppermost section. This is protected by a cover plate, which can be removed to allow you to see the wire connections on the interior of the enclosure. A flexible conduit or flexible metal cable, such as metal-clad (MC) cable, is typically used to encase the wire conductors running to the heater and protect them from damage. This flexibility gives a little amount of wiggle space, which makes it easier to repair the water heater, and it is a mandatory feature in many earthquake-prone locations, as well.

Understanding Water Heater Wiring

Electric water heaters necessitate the installation of a 240-volt dedicated circuit that serves only the water heater and none of the other appliances or devices on the circuit. In most cases, the circuit wiring will consist of a 30-amp double-pole breaker and 10-2 non-metallic (NM) or multi-core (MC) cable. If you have a black circuit wire, it should connect to the black wire lead on your water heater, and if you have a white circuit wire, it should link to either the red or white wire lead on your water heater.

The circuit ground wire is connected to either the green ground screw on the water heater or the ground lead on the water heater, depending on which is appropriate.

Heating Element Wiring

Electric water heaters necessitate the installation of a 240-volt dedicated circuit that serves only the water heater and none of the other appliances or gadgets in the house. In most cases, the circuit wiring will consist of a 30-amp double-pole breaker as well as 10-2 non-metallic (NM) or multi-core (MC) cable. If you have a black circuit wire, it should connect to the black wire lead on your water heater, whereas if you have a white circuit wire, it should link to either the red or white wire lead on your water heater.

The live current in a 240-volt circuit is carried by both the black and white wires, as opposed to the ordinary 120-volt circuit. If appropriate, the circuit ground wire is connected to either the green ground screw on the water heater or the ground lead on the water heater.

The Bonding Question

According to some construction codes, a bonding wire, also known as a bonding jumper, is required between the hot water and cold water pipes that serve the water heater. Keep in mind that the bonding jumper is not needed by the National Electrical Code or the Uniform Plumbing Code, but it may be required by your local building authority. If you have any questions, please contact your local building authority. It is possible that a bonding jumper will be necessary in order to guarantee a stable bond in a metal water distribution system.

See also:  How To Pump Water From Dehumidifier?

In addition to this, the bonding wire is responsible for ensuring that the electrical grounding pathway on the water pipes is maintained.

No matter how you look at it, the most common bonding wire consists of a 6 AWG bare copper wire that is linked to a ground clamp on each of the hot and cold water pipes.

When replacing a water heater, it’s only a question of double-checking that the jumper connections are in place once the new water heater has been installed.

How to Wire an Electric Water Heater

The majority of residential hot water heaters are powered by a 240-volt electrical circuit. While all voltages are potentially hazardous, it is this specific voltage that is most well-known for inflicting severe damage or death when used in this manner. When wiring an electric water heater, it is absolutely critical that the circuit be turned off before proceeding. After all of this is said and done, the actual task of wiring an electric hot water heater is rather straightforward and straightforward.

Wiring an Electric Water Heater

It is likely that the circuit will already be in place at the location if you are replacing an existing hot water heater. However, if you are upgrading from a gas-heated unit, you will be responsible for running the circuit yourself. If this is the case, you will want a two-pole, 30-amp breaker as well as 10-2 NM cable to run for your circuit to function properly. Important: Do not fill the tank with water until the tank has been properly connected, and then do not switch on the circuit until the tank has been properly filled with water!

Step 2

The junction box cover will be located either on the top or the side of the hot water heater, depending on the model. This is where the connections will be completed. Remove the screw and the lid from the device. Two lead wires and a ground screw should be visible on the inside of the case.

Step 3

Before you begin, check the circuit with the voltage tester to make sure it is completely turned off. Then, using the needlenose pliers, pry the knockout on the junction box away from the box.

For a new installation, remove the plastic outer sheath of the NM cable so that about six inches of wire is visible through the cable. Remove approximately 3/4 inch of insulation from each individual wire by using the wire strippers when that step is completed.

Step 4

Before you begin, make sure that the circuit is turned off with the voltage tester. Remove the knockout on the junction box with the needlenose pliers after that. If this is a fresh installation, remove the outer plastic sheath of the NM cable, leaving approximately six inches of wire exposed. Remove approximately 3/4 inch of insulation from each individual wire by using the wire strippers when that step is complete.

Step 5

Wrap the ground wire around the ground screw and tighten it down to ensure that it is completely secure. Taking the black wire from the feed circuit and one wire from the water heater (it doesn’t matter which wire), twist them together until they are securely connected. Wire connectors should be used to secure them, and electrical tape should be wrapped around the connection to provide further protection. The white wire coming from the panel should have electrical tape wrapped over its insulation in order to be identified as a current-carrying line (this should also be done at the breaker as well).

It is important to note that because the hot water heater is a 240-volt piece of equipment, it does not require the use of a separate neutral wire.

Step 6

Replace the cover on the junction box. Reconnect the water supply and refill the water heater with fresh water to start the process over. After the container is completely filled with water, switch the circuit breaker back on.

Electric Water Heater Installation: Step-by-Step Guide

If you’re the DIY kind, installing an electric water heater isn’t quite as complicated as it may appear at first glance. However, before starting the project, you should keep in mind that you will be required to perform some basic plumbing and electrical tasks. Even if these kind of jobs make you feel uncomfortable, there are several trustworthy companies that you may hire to install your new water heater. Nevertheless, if you’re up to the task, you may save money by doing it yourself. Generally speaking, electric water heaters have a life span of 8 to 10 years before they need to be replaced.

If you haven’t previously done so, you should troubleshoot the leak before investing in a new water heater.

Except if you discover that the leak is coming from the tank itself, you will have no choice but to replace the water heater.

Preparing to Install an Electric Water Heater

Having concluded that you want a new water heater, you may like to consult our buyers guide to assist you in selecting the most appropriate model for your needs. Furthermore, if you elect to install the water heater yourself, you will be responsible for removing your old water heater and properly disposing of it. Find Local Plumbing Professionals

Tools and Supplies

Installing an electric water heater is far less difficult than installing a gas water heater, but it is still a significant undertaking. Our recommendation is to hire a professional to complete the installation if you are unfamiliar with electrical and plumbing.

In addition, they will often dispose of your old water heater for you as part of the installation process. The following are step-by-step instructions for installing your electric water heater:

Disconnect the Electricity

First, we’ll have a look at what to do. Turn off the electricity to your water heater at the circuit breaker panel located near your water heater. Check the wiring of the water heater using a voltage tester to ensure that the device is turned off. Although it is not discussed in the video below, it is always a good idea to double-check that the water heater is not receiving any power after turning it off at the circuit breaker before doing any work on it. Start by turning on a hot water faucet and letting the water flow until it is cold.

The cold water feed to the water heater should be turned off (located at the top of the unit).

Drain the tank by opening the valve and venting it to the outside (or to a floor drain, or even into buckets).

You may also use the T P valve to your advantage.

Disconnect the Electrical

The next step is to disconnect the electrical cables from the water heater’s top. To begin, be certain that the circuit breaker in the breaker box has been switched off. Then, before you begin, verify the wires with a voltage tester to ensure they are in good working order. Cap the wires and name them (or take a picture of them) so that there is no confusion when you are connecting your new water heater in the future.

Disconnect the Plumbing

Step 4Disconnect the hot and cold water supply lines from the water heater. Copper plumbing may have been used in the installation of your water heater, and you may need to cut the pipes. If you need to cut the pipes, use a tubing (pipe) cutter and try to leave as much of the pipe as feasible intact as you can before cutting. If the discharge pipe from the T P valve is in good condition, you can remove it from the T P valve and reuse it on your new water heater.

Remove the Old Water Heater

Step 5: Using a dolly, move the old water heater out of the way after the tank is empty. Place the new tank in its proper location. It is recommended that the replacement tank be placed in a drain pan. Find out why. Make certain that your electrical supply will be sufficient to reach the tank. Check sure you have access to the panels and the drain valve in case you need to do maintenance.

Prepare the Plumbing Lines

The pipes will need to be prepared with a sandpaper cloth if your old water heater had copper plumbing and it was required to cut the pipes. Rub the ends of the pipes with the sandpaper cloth until they are gleaming brilliantly again. Find Local Plumbing Professionals

Connect the Electrical Wiring

In order to gain access to the electrical cables, remove the junction box cover in Step 7. Attach the ground wire to the green ground screw using a crimp connector. Wire connectors are used to join the other wires together by twisting them together.

Make use of the prior wire connections as a reference and reconnect the wires in the same manner in which they were disconnected. Follow the directions on your label tags or the photo you took in Step 3. After that, reinstall the lid of the junction box.

Attach the Supply LinesTurn On the Water

Step 8: Connect the water supply lines for hot and cold water. Make certain that the cold water pipe is connected to the cold water intake on the water heater (it’s easy to make the error of connecting the cold to the hot water pipe). If your old water heater was plumbed with copper piping, you may want to consider plumbed it with copper piping once more. Flexible hoses, on the other hand, are highly recommended for making the connections. Not only is it more convenient, but it is also a suggested safety element in the event of an earthquake.

  1. Connect the flexible hoses to the nipples on the water heater using the hose clamps.
  2. When connecting flexible hoses to the hot and cold water pipes, we recommend that you use dielectric connections to prevent shock.
  3. By turning on the hot water faucet at the adjacent faucet, you may check for leaks in the flexible hose connections.
  4. Although this step is not discussed in the video, we recommend that you double-check your plumbing before continuing forward with the project.
  5. As soon as the tank is completely refilled, water will begin to flow out of the hot water faucet.

Attach the T P Discharge Pipe

Connection of the hot and cold water supply lines in step eight Make certain that the cold water pipe is connected to the cold water intake on the water heater (it’s easy to make the error of connecting the cold to the hot water line.) If the copper piping in your previous water heater was still in good condition, you may decide to reinstall it. The use of flexible hoses to create the connections, on the other hand, is strongly encouraged. Furthermore, it is a suggested earthquake safety element since it is not only simpler but also more effective.

  • Connect the flexible hoses to the nipples on the water heater using the hose clamps.
  • When connecting flexible hoses to hot and cold water pipelines, we recommend utilizing dielectric connections.
  • Turn on the hot water faucet at the nearest faucet to check for leaks in the flexible hose connections.
  • Despite the fact that this step is not discussed in the movie, we recommend that you inspect your plumbing before proceeding.

As long as there are no leaks, you can keep filling the water heater tank with water. When the tank is completely full, water will begin to flow out of the hot water tap in the bathroom.

  • Make use of a 3/4-inch male copper fitting. Paintpipe dope applied on the exterior of the fitting as well as the interior of the valve fittings. Tighten the fitting to the T P valve fitting once it has been attached. Remove the fitting from the pipe’s end and clean it
  • Soldering flux should be painted on the inside of the male fitting and outside of the pipe. Fitting the pipe to the fitting is completed. To join the pipes, solder and a torch should be used.

Turn On the PowerBleed the Hot Water Lines

A 3/4-inch male copper fitting is recommended. Paint the exterior of the fitting and the interior of the valve fitting with paint pipe dope. The fitting should be attached to the P valve fitting and then tightened. Remove the fitting from the pipe’s end and clean it well. Soldering flux should be painted on the inside of the male fitting and outside of the pipe; The pipe should be connected to the fitting. The pipe should be connected using solder and a torch;

Bleed Hot Water Lines

Step 11Allow the hot water tap to run for a few minutes until it stops “sputtering” in order to expel the air trapped in the tank and piping system. It may take many hours for the water in the tank to reach its maximum temperature. The temperature setting that is recommended is 120 degrees Fahrenheit. Let it sit for a couple of hours before checking the T P discharge pipe. If the pipe is dripping, it is possible that the pressure is too high.

Watch the Video

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