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Where do the wires on the 240v element connect?

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Where do the wires on the 240v element connect? - wires-240v-element-connect-2twpke0famvgldalck04zdql-3-0.jpg

Posted on May 05, 2015

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I have a craftsmaster electric hot water heater 40 gallon 2 elements and I want to know if I need double circuit breaker for it because I have hooked it up and it isnt getting hot


most water heater of that size is rated 240v, therefore it needs 2-pole. is it 240v rated? make sure you have a properly sized circuit breaker & matching conductors (wires) with the kw rating of the water heater

Oct 05, 2015 | Water Water Heaters

1 Answer

Electric Travel Cooker, Sanyo RN-AVA308, will not heat up, where can I have it serviced?


I have the same unit and the same model number. Mine also not heat up. upon investigation I noticed the heating element has a 4 wires which I believe each pair (2 wires) meant for 100/120V and the other one is for 220/240V. I checked 2 wires (1 pair) has an open circuit while the other pair is ok. I directly connected the heating element to the power and it was heated up. I measured the resistance and it was around 78 ohm. from my lame calculation this is for 100/120V heating element. the 220/240V was busted.

Since mine on 220/240V power grid, to use the working 78 ohm heating element the estimated power would be P=VxV/R, around 738W which is way too high than the rated power (365W) for this voltage. I plan to add the dummy resistor 82 ohm + 78 ohm heating element to reduce its power around 370W. Hope it works.

Mar 23, 2011 | Kitchen Appliances - Others

1 Answer

I have replaced the bottom element,and now i have no hot water. I check with a meter and have power to the top element but not the bottom one.


First of all, you have 240V water heater because tank has two elements.
You have no hot water, and tank has power to upper element.
Lower element has no power.

Something doesn't sound right.
You're not testing correctly.

Before doing anything, test across top two screws of upper element for 240Volts.
This will eliminate electrical problem as suspect.
Breaker must deliver 120V on both legs to complete the 240V circuit.
Every single-phase household circuit takes 2 wires to complete the circuit.
With 120V you need 1 neutral wire and 1 hot wire to complete circuit.
With 240V you need 2 hot wires, one from each hot busbar, to complete circuit.
Your water heater can appear to have electricity if breaker is delivering power on one leg of the 240V circuit.
To check breaker for sure, move wires to another similar size breaker to see if water heater functions properly.
http://waterheatertimer.org/B220C.html

If 240V circuit is good, then next thing is take 30 minutes and do full test of water heater parts.
This will identify exact problem(s) without guessing.
Buy 5$ multimeter from Home Depot. Install battery.
When test calls for continuity, rotate dial to Ohms (upside down horseshoe is ohms).
When test calls for testing voltage, rotate dial to 240-250-277 VAC
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add a comment for more help.

Dec 28, 2010 | Rheem Water Heaters

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No hot or warm water what is the voltage reading susposed to be on the heating elements? I have 122 volts on each terminal on both elements but no action, what am i doing wrong?


If water is totally cold, then upper element is not getting 240V. Since element tested for 120V, then that says upper element is burned out, upper thermostat is bad, or circuit breaker is bad.
Best thing is to buy multimeter and do 30 minute troubleshoot:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Also read information below for understanding how water heater works.

Testing elements for voltage can be misleading.
If water heater has 2 elements, then tank is 240Volts.
240V water heaters have 120V on each element at all times.
So elements have hot 120V power, but they are not turned on until the circuit is complete with 240V.
Open following links to read specifics about 120V and 240V
http://waterheatertimer.org/B220C.html
http://waterheatertimer.org/How-water-heater-thermostat-works.html

240V is made from two 120V Hot wires from breaker box.
Each 120V line from breaker is called a 'leg.'
So 240V circuit has two legs, and both legs need to be turned on to complete 240V circuit.

Water heater thermostats turn off only one leg.
The other leg is Hot all the time.
So when you test screws on an element, for example test between a screw and any bare metal part of tank, then the screw will always show 120V.
That is just one leg of the 240V circuit.
But the 240V circuit is not turned On until both legs are connected.
Every residential circuit needs two wires to complete the circuit, and in the case of 240V, those two wires are both 120V.

When the thermostat turns on, it turns on the second leg to the element and that completes the 240V circuit.
http://waterheatertimer.org/How-it-works.html

Dec 16, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

I have a Maytag Neptune Dryer that won't heat. we replaced the thermistor and the control board. What else could it be?


First unplug dryer and test your heating element for continuity with a multimeter if it has more than about 30ohms it is bad.Next check for 220v-240v at the heating element with the dryer running (This is not a test for an amateur. If you are not familiar with electricity I would recommend calling a service tech. If you have 220v-240v there and no heat the heating element is most likely bad. If not then trace the wires back to find the open circuit could be a thermostat or the thermal fuse or just a loose wire/bad connection.

Oct 28, 2010 | Maytag MDE9700AYW Neptune 174 Electric...

1 Answer

Installed new upper & lower elements & thermostats, only top htr works


If original problem was caused by sediment burning out lower element, did you clean sediment out of water heater when changing lower element?
Two element water heaters are 240V.
Thermostats cut power on one hot wire, but 240V circuit has 2 hot wires. So lower element has power at all times coming from the red wire.
1) Use ordinary tester or multimeter set to 240V <> test each screw of lower element to bare metal part of water heater. Each screw should show 120V. If there is no power, then upper thermostat is defective, screw on upper thermostat is loose, or red wire between upper and lower parts of water heater is bad.
2) Remove wires from lower element. Use continuity tester or multimeter set to ohms <> test across both screws of element to see if power travels through element <> if element is bad, then continuity tester will not light up and multimeter will show no ohms. Put wires back on element after test.
3) Start with cold water in tank. Turn on water heater & upper element will turn on. Put ear on side of tank to hear if upper element is heating water. Test #3 screw to #2 screw on low left side of thermostat, should read 240V > Test #3 screw to #4 screw on low right side of thermostat, should read 0V.
Put ear on side of tank. When upper element turns off: Test #3 screw to #2 screw on low left side of thermostat, should read 0V > Test #3 screw to #4 screw on low right side of thermostat, should read 240V. If this test shows 0V and 0V, then upper thermostat is bad. If reading is correct, immediately move to next test.
http://waterheatertimer.org/images/Thermostats-numbered-divided-500.jpg
4) Turn temp on lower thermostat to 150. Using ordinary tester or multimeter set to 240V <> Test across both screws of lower element. If there is no reading, and you know element is good from step 2, then lower thermostat is bad, or wire is bad between lower element and lower thermostat, or wire is bad between lower thermostat and top part of heater.
5) Test across both lower thermostat screws, should read 240V.If this test is good, it means wires are good. Put jumper wire across both screws of lower thermostat, and test lower element again. If element finally turns on with jumper wire, then lower thermostat is bad.
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http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

If wire is bad between upper and lower parts of water heater, and water heater has tight-fitting 2" foam insulation, it usually indicates water heater replacement.

Sep 20, 2010 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

I can't get 240v across the bottom element. Where should I start? Shouldn't it have 240v across it? I can ground one side of the meter to the tank and can get 120v to each side, but not 240v across the...


If that is indeed so you have a "Short" between Phase and Earth. .. YES one should have the mains Voltage across the Load, But NEVER anything between Phase & Earth. Look think of it all like this. The Phase comes in, to a, say, a switch, from switch, to thermostat, from thermostat, to One Side of the "Load" Element. The "Other side of that "Load" Element then goes to Neutral. Circuit Complete. Two elements, wired in series would indeed split the Voltage, if wired that way. If done like this, but if wired in parallel, then, again Both would have One End, connected to Phase, & the "Other" side(s) would go to Neutral. Thus the circuit is complete. Some setups are more complex, and use two elements. but essentially all the same. The elements could be wired in series or parallel, depending on current draw/resistance. The Phase is the wire always "Broken" and the Neutral is always "Common".
BE CAREFUL.

Feb 10, 2010 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Ryer not heating


If you have 110v from the timer connection to the element and ground, that is normal. You should have 240v between the two element connections. If you do, and the element is not hot, disconnect the wires from the element and check the continuity of the element. If you don't, check back thru the wiring until you find 240v. This test will show you where the fault is.

May 05, 2009 | Dryers

1 Answer

Whirlpool dryer LER5636EZ3


hi thanks for your question make sure you have 240 volts at dryyer dicconnect dryer from power source check for ohms at the element take one wire off and check at element there could be another thermostat that sometimes is missed because its on the heater housing at the top of housing check that the appliance doc

Sep 14, 2008 | Dryers

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