Wattage appears on end of each element Figure wire and breaker size Turn up thermostat temperature to get more hot water Ways to increase amount of hot water California restaurant code requires watt 9K simultaneous water heater certified by manufacturer. They do not allow rewire of residential tank since manufacturer will not certify. Increased first hour delivery of hot water Faster recovery time Watt elements , then total wattage is watts.

Use 50 amp breaker and 6 gauge wire or two 30 amp breakers and two 10 gauge wires Watt elements , then total wattage is 11, watts Use 60 amp breaker and 6 gauge wire or two 30 amp breakers and two 10 gauge wires Oversizing breaker and wire runs cooler and is more efficient Off-peak Connect lower thermostat to timer and convert water heater into off-peak operation. Water heater companies are integrating their products with future smart-grid.

Except they are installing electronic thermostats. SO buy extra parts and water heaters now. Change water heater temperature using GM40 timer and simultaneous wiring Not necessary to increase wire or breaker size for this diagram Use timer for two different temperatures on electric water heater. But not both at same time.

Water heater elements VERY SIMPLE question! - Home Improvement | DSLReports Forums

Install ECO-protected thermostat for lower thermostat. Both upper and lower parts of tank are ECO-protected from overheating Rewire tank so upper and lower parts are separate. Use GM40 timer to switch power between lower and upper parts of tank. Normal operation, the lower thermostat and element receive power and keep tank at temperature set point. Upper thermostat and element have no power. This is called 'redundant' water heater operation. This technique for heating tank more rapidly after cold water first enters tank.


When timer activates, power to lower part of tank turns OFF. Power to upper part of tank begins. Upper thermostat is set for higher temperature. Since tank is at regular temperature, the higher setting means upper element will turn ON and begin heating tank to higher set point. Use this technique to heat water very hot for laundry cycle. The lower part of tank will cool rapidly as new cold water enters tank, so this technique is good for making short-term batches of hot water. Two 30 amp breakers required Larger image.

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How to set and wire CA Zwave contactor Wires attach to either screw on element: How to test elements How to replace elements Resources: How residential water heater works How to replace thermostats on electric water heater How to replace thermostats on gas water heater Troubleshoot electric water heater Troubleshoot gas water heater Buy thermostats Water heater thermostats at Amazon. Marathon thermostat and element wiring Craftmaster thermostat wiring Whirlpool electric water heater thermostat wiring 3-phase electric water heater service manual.

Only lower element operate.

Wiring an Electric Hot Water Heater

Remove blue and yellow wires from upper thermostat Step2: Move black wire from terminal T4 to terminal T2 Tighten screws very tight against copper wire. ECO protected thermostat must remain at top of tank to protect against overheating event. Redundant thermostat Upper element is disconnected. Lower element heats tank.

Water heater responds immediately when cold water enters tank. Can possibly cause more stacking events Both thermostats control lower element. When upper part of tank cools, the lower element turns ON. When lower part of tank cools, lower element turns ON. ECO-protected thermostat must be kept at upper part of tank to avoid overheating event that can damage or rupture tank, cause scalding, release of hot water through TP valve and distill chemicals out of the water.

Cold enters lower part of tank through plastic dip tube. Homeowners should check with plumber before altering water heater wiring.

See insurance data on water heater failure. Redundant thermostats control 2 water heaters. Additional tank in series to double available hot water at peak times See wiring option below Read about two water heaters. Redundant thermostats control 2 water heaters Purpose: This will happen IF water heater is poorly insulated or hot water is drawn from heater 1 or incoming water is very cold.

Either heater can be wired for redundant or typical non-simultaneous operation. The key is adding ECO-protected thermostat to lower part of heater 1, and adding wire from lower thermostat so power can be transferred to heater 2. Water heaters with foam insulation may require long drill bit from home center or fry's to bring wire to top of tank.

Read about two water heaters. How to re-wire electric water heater. If you cannot rewire water heater because of foam insulation or other factors such as warranty: Re-plumb water heaters in series, and run additional 30 amp circuit to additional heater. Then put both water heater on a timer Both water heaters turn on-off at same time Resources See basic water heater circuit How to wire WHQ timer and GM40 timer Water heater timer for two water heaters More box-type water heater timers.

Convert 3-phase balanced to 3-phase non-balanced for residential use has moved to another page Resource: Always use ECO-protected thermostat on upper and lower Elements will heat with any applied voltage Each element has volts and watts listed on side.

Unbalanced means that 1 leg of the three phase carries greater load than other two legs. So this is just ordinary single-phase water heater except few wires moved so there is a 3-wire connection on top of unit. Difference is that 3-phase non balanced will usually have larger wires and breaker and elements. Unbalance water heater uses ordinary 2-pole element and thermostat, except thermostat can be rated for 40 amps at Volts, and 30 amps at volts Ordinary hardware store thermostats are rated 30 amp at V.

Balanced water heater uses element with connections for 6 wires. Larger image Another image slightly different wiring: L2 50 amps, L1 and L3 29 amps, depending on each element etc Compare with non-simultaneous shown above: Move Red wire from T4 on upper thermostat to L1 on upper thermostat Either element can turn ON, as temperature varies top and bottom of tank Always use ECO-protected thermostat on upper and lower Elements will heat with any applied voltage Each element has volts and watts listed on side.

Wiring an electric water heater is an above average repair task. You have both skill issues and safety issues. For and explanation of the terms in this section, see How to Use This Site. Is the breaker tripped? Unfortunately, a tripped breaker may be indicative of a more serious problem. Electric hot water heaters also have reset buttons see below. Again bad news, if the reset trips it usually means something more serious is wrong. Did you read the beginning of this article? You have some very serious power going through your electric water heater. Be safe, take precautions. Water is also involved.

Draining down a tank or flushing a tank will involve water, be prepared. Most hot water heaters are on a 30 amp two pole breaker. The two poles means it is a stated volts or an actual volts. As long as your water heater is not too far from the panel it will be wired with 10 wire.

How to Replace an Electric Water Heater Heating Element

This is the common format for wiring an electric water heater, but it is not the only one. Some newer two element tanks give you an option for simultaneous operation. In years gone by most electric water heaters with two elements were factory wired so that only one element would heat at a time. The upper thermostat would keep track of this, only allowing the lower element to heat when the upper one was finished. This is why electric water heaters have a longer recovery time than gas.

Now there is the option of wiring a hot water heater so the both elements run at the same time. This reduces the recovery time and will provide more hot water. The trade off it that it uses more amps and requires heavier wire. Wiring an electric water heater with simultaneous element operation will mean a 45 Amp breaker and 6 wire. In a house that was wired any length of time back you probably don't have the right wiring for this configuration, even if you get a new hot water tank.

You always want to check local codes before modifying any wiring in your home. So how many wires do you get anyway? Wiring an electric water heater does not require that you use a plug in device.

Using Common Sense Header

Therefore an extra conductor is not required. 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. Shielded metallic cable should be used from the water heater to the wall or ceiling.

There will be an adapter connected to the top of the tank and the shielded cable will continue until it is out of the area where the wiring might be damaged. You may find that a cable with an extra conductor has been used. In this case the red and the black wire will be used as the hot leads. You now have an redundancy with the ground and the white wire.

The white wire is not needed. The long and the short of this story is that a water heater needs two hot conductors and a ground to work. I have not mentioned volt electric water heaters up to this point. For a residence they are highly impractical. They cost a lot to run and will not produce enough hot water to satisfy the needs of a home. The first thing you want to do is make sure that you are getting power to your electric water heater.