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hot and neutral reversed but wired correctly

Jaybird. Inside an outlet's electrical box, the black (hot) wire should be connected to the brass-colored terminal on the outlet. I replaced this receptical and caused the short. We welcome your comments and suggestions. The bare or green wire should be connected to the green ground screw on the receptacle. Tester shows outlets as Hot/neutral reversed I tested my outlets in 318 rst reflection and they all read as mis wired. When examining the electrical system during a home inspection, inspectors check the polarity of electrical receptacles, or outlets. The hot and neutral wires must be connected to the proper terminals on the electrical receptacle or at any other electrical device or circuit. Black wire “hot” or “live”(or red wire) should be connected to the brass-colored screw terminal on the electrical receptacle, usually marked BLACK or HOT. I recently plugged a surge-suppressor strip into a seldom-used outlet in my base... Electrical, AC & DC. It's only when I press the "Test" button that tests the GFCI capability when the Hot/Neutral reversed … On very old houses, with sockets that have both sides the same and are not marked the hot side will be the one on the right and the neutral on the left - but then upside down they're reversed so it really doesn't make much difference. If you get this reading on an outlet tester, don't believe it. There are no polarities in AC, so live and neutral can get interchanged without any problem in AC circuit in appliances. A brief definition of Hot and Neutral wires: On a standard outlet, which is technically called a 'duplex receptacle', there are two wires that carry electricity. The practice is unsafe and less dangerous, however than the “reverse bootleg”, where the hot and the neutral wires get mixed up ending up on the wrong terminals with the ground terminal connected to the Hot instead of the neutral wire (Figure 7) and creating the same hazard as described in section 4.4. Third receptical has two black and two white wires, originally reversed, and working before the short. When everything is normal, when I plug in the outlet tester, it shows it as fine, ie. I'm confused. A receptacle with reverse polarity will have the white (neutral) wire screwed to the hot side (copper screw) and the black (feed) wire screwed to the neutral side (silver screw). DoItYourself.com®, founded in 1995, is the leading independent home improvement and repair website. In any case, unless all 3 contacts are connected (hot+neutral+ground), an outlet tester may not give reliable results. It's probably loose at the previous box. Reversed polarity creates a potential shock hazard, but it's usually an easy repair. There’s a white wire that’s connected (or grounded) to the Earth, and is often called the neutral wire. Website operating problems contact Webmaster. Do You Need A Portable Air Compressor For Your RV? Testing 3-Slot Receptacles for Reversed Wiring . … In fact almost no breakers left at all, just the plugs and lights. As stated above, when I got power from an outlet without the hot/neutral reversed yesterday, the controller hit its setpoint and the pump came on. They are wired correctly, connections are good, etc. Is this a new problem that just showed up or has this been going on and you just found out? A licensed electrician has been wiring our new dormer. Yea, I have...with every outlet in the coach. If the tester lights, you have established that the receptacle is wired incorrectly—the hot wire is attached improperly to the neutral slot on the receptacle. Next is the single receptical, with one white and black wire in box. I am replacing all the breakers just for shits and giggles. I replaced this receptacle in my bedroom, making sure that the black wire is to the small hot slot, and the neutral white wire is to the longer neutral slot. One of these, or something different ? Assuming a branch circuit that consists of a single 120V outlet w/ ground, is it acceptable (code-wise) to rewire the branch to 240V by using the neutral as hot (black tape on both ends to label it) and replacing the breaker with a 240V breaker with the same amperage rating? Any reason why this won't work or i should be worried? Wiring 120v battery inverter power feed into 240v panel at cabin. Everything is wired correctly. All rights reserved. Weird thing happening. Used a voltage tester and, indeed, neutral-ground is 120v and hot-ground is 0. My only suggestion is to isolate all the outlets downstream of that GFCI and make sure they are all wired correctly. View our Privacy Policy here. Most things plugged into it will still work correctly with the 115V difference, but there is potential for a major shock or fire there. If these connections are backward, the polarity is wrong. Remember electricity is dangerous and can be fatal. You may freely link to this site, and use it for non-commercial use subject to our terms of use. Coach shows all outlets with reverse polarity when the back GFCI outlet is set, but when I turn it off all the front outlets show fine. You should be qualified and competent to carry out any electrical work. Are you using a gif like Ron shows? Never work on live/hot electrical circuits.Before we get into this video there are three things I need you to remember.1) Electricity will only flow in a complete circuit, if you come into contact with an electrical conductor, your body might complete the circuit. Its worth it on a 20 yr old MH, even if it dont solve the issue. Same as between wide and ground. I have 120 between wide and narrow. Reversed polarity is when the hot and neutral connections at a receptacle are wired “backwards.” Wiring is color-coded, and the black wire is “hot,” meaning that it is electrically energized, normally to about 120 volts. I do, which is how I found the reverse polarity to begin with. 3) Electricity … Need some DIY advice on running a 240v panel off a 120v feed. I bought it a few months ago and I am remodeling it now. You cannot check for polarity with the GFCI off - there is no power to the downstream outlets with the GFCI off. However, when it comes to wiring in house, live and neutral should not be interchanged. Thanks. It will shock you if you touch it. What Is A Toy Hauler (And Why Should You Get One)? If the hot-to-neutral voltage measured under load is greater than the hot-to-ground voltage, the neutral and ground are reversed. Testing for reversed polarity can be performed with a small handheld receptacle or outlet tester.Modern grounded receptacles have 3 openings or slots – one for the hot, one for the neutral and one for the ground. Reversed polarity creates a potential shock hazard, but it's usually an easy repair. 2) Electricity always tries to return to its source. On a standard outlet, there are two wires. Electricity may still be inside a plugged-in device, causing a greater chance of electrical shock upon handling the item. Copyright © 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. Visit http://thecircuitdetective.com/outlet_tester_readings.php for more resources. It sounds like you need to double check your gfi use a volt meter make sure the of line side, 110v in load side 110v out to outlets, when tripped other outlets should be dead sounds like hot or ground or reversed, one to line one load, if you don't have the proper load and line wired correctly when your gfi is tripped it can cause reverse polarity down stream by having one line open at the gfi. Thanks for the reply. Reversed polarity electrical receptacles: The hot and neutral wires must be connected to the proper terminals on the electrical receptacle. My wife (always curious and cautious) checked the newly installed outlets with the indicator-light type tester. One of these wires is connected to the earth, or 'grounded', … It should be able to trip the gfi from an outlet down stream. Thanks! And if there is still power to the downstream outlets with the GFCI off, then you aren't looking at the right power source for those outlets. Yes, the device will still work. I melted the inside of my wall outlet. Hi, If you measure between hot and neutral you will see 120V (if I understand USA terminology and voltages correctly) if you swap the leads of the tester you will measure exactly the same voltage. Inspect your receptacle. This happens when the hot and neutral wires get flipped around at an outlet, or upstream from an outlet. A standard receptacle tester cannot detect a Bootleg ground reporting it as correctly wired or “correct”. All information is provided "AS IS." Two different outlets (but on the same circuit as the one I originally asked about) test as hot and neutral reversed. But when I pushed the button on the tester to trip it, the lights switched to Hot/Neutral Reverse and would not trip. I replaced receptical, wired correctly, doesn't work. The black is going to the narrow slot, and white wire to the wide slot. I replaced, wired correctly, and now works. Usually the wiring problem is found to be at the IEC female connector. https://www.amazon.com/Gardner-Bende.../dp/B00170KUPC. And the ground wire to the green screw, tight. If plugged in correctly, the output will be neutral and 115V. The hot wire is supposed to be attached to the hot screw (the gold one), and the neutral wire should be attached to the neutral screw (the silver one). I pulled every outlet to visually check the wires also. I discovered the above when I ran the pump on a temperature controller. It sounds like you need to double check your gfi use a volt meter make sure the of line side, 110v in load side 110v out to outlets, when tripped other outlets should be dead sounds like hot or ground or reversed, one to line one load, if you don't have the proper load and line wired correctly when your gfi is tripped it can cause reverse polarity down stream by having one line open at the gfi. We are trying to ease into solar and currently have a 900 w 120v inverter with plans to upgrade to a 3000 w but still 120v as it seems all 240v inverters are very expensive. Voila! This wire can be any color except white, but it’s usually red or black. The first outlet that I wanted to inspect, that was indicating hot neutral reversed, I went ahead and pulled it out. On this exterior GFCI, the tester showed it had a ground. I don't see how any tester would be able to detect a reversed hot/ground when connected only to the hot and ground -- are you sure it didn't say "Hot/Neutral reversed"? There’s a three prong receptacle in my bedroom that has a ground wire, neutral wire, and hot wire. It is not a switched outlet, and I'm pretty sure I have the wires connected correctly. First post ever so pls excuse any mistakes. Hot and ground wires that are reversed can be dangerous, because the switch that is meant to break the hot wire's connection does not break the ground wire when it is hot. Hot neutral reverse typically occurs when the hot wire, (it is supposed to be black) is attached to the neutral screw on the outlet. Just bought an old NYC apartment built in the 60's. ... the tester you are using is correct then I would be checking the wiring as much as I could to make sure I had them all correctly wired. If the outlet is wired correctly, this will ensure that the device will function correctly … With it wired as described, a reading of "Hot/Neutral Reversed" on your tester is likely an indication of a loose neutral wire. The odd part is that the kitchen outlet that tested good, also had the correct wire color polarity. a floating ground. The hot is always the smaller of the two slots, and the neutral is slightly longer. To check for reversed neutral and ground wires, measure the hot-to-neutral and hot-to-ground voltages under load. You can also get a hot/neutral polarity reversal with an improperly wired aftermarket or home brew power cord. If you have the black wire on the gold screw, and the white wire on the silver screw, with the bare wire on the green screw - the outlet is wired properly. Maybe I'm reading it wrong, but I think one unanswered question is what device - test equipment - are you using that "shows" reverse polarity ? If plugged in backward, the output will be 115V and 230V. Not sure what is going on but if the wiring to the GFCI isn't the correct polarity it won't set. [Click to enlarge any image] The "hot" or "live" black wire (or red wire) should be connected to the brass-colored screw terminal on the electrical receptacle, usually marked BLACK or HOT. I have 120 between wide and ground and zero between narrow and ground. In normal generator operation I'd plug the cabin right into the generator as I do now and when using the solar/battery powered inverter I'd just plug the cabin cord into the little adaptor and then that cord into the inverter. Reverse polarity is associated with an open neutral many times. Cabin is a converted mobile home with a 200 amp panel 240v but NO 240v breakers and NO split plug breakers. For many newer devices, such as electric drills, it makes no difference - the device has a double-pole switch and when “off”, both wires are disconnected from the motor. New panels that were all romex but half the receptacles in the house had no grounds. Why would a wall outlet give a dim indication on a tester of hot-neutral reversed when everything appears to be wired correctly in the outlets? The meter socket is jumpered and a heavy cab tire (4 ga maybe) cord runs to a 30 amp cord end plugged into the generator. Notice in the diagram that one side of the plug has a wider blade. Reversed neutral and ground wires. To my surprise, the wiring colors look correct. With no 240v need or usage, and no split plugs my idea was simply to make a short 3 wire cord with a std 120v male end to plug into the inverter and then a 30a 240v female end with the ground, neutral, and single hot connected and a short little black jumper tying the two hot sides of the female cord end with the jumper right inside the cord end housing. How to check for hot/neutral reversed polarity at the wall receptacle. Hey Guys- This was on an older house that had some of the electrical re-done. I verified that the pump is wired correctly, A little more detail. Place one probe into the long vertical (neutral) slot and the other probe on the center screw of the cover plate. The greater the load, the more difference you'll see. The pump would come on even when the controller was off. This happens when the hot and neutral wires get flipped around at an outlet, or upstream from an outlet. What are you looking at that says its ok? There is also a wire behind the outlet that isn’t grounded. Currently Active Users Viewing This Thread: 1. It is sometimes called the “live” wire. I live in a 1951 home, for the record. The Hot side will also have a slightly smaller opening and the Neutral side will be a bit bigger or longer. The hot-to-ground reading should be higher than the hot-to-neutral reading. The white (neutral) wire should be connected to the silver-colored terminal. I believe it was updated in the 80's, but not really sure. Incredibly,according to the lights on the "dime-store" tester, all but 2 of 22 outlets, have the Neutral & Hot wires reversed. I have an off the grid cabin in Ontario Canada that currently is powered via a 240v feed off a 4000w generator. A tripped GFCI will allow no power beyond itself. It’s called the hot wire and it actually carries electricity. Please support our sponsors and let them know you heard about their products on iRV2. Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". So its a new to me problem, lol. Electronic Equipment and Computers, http://www.doityourself.com/forum/li...-pictures.html, Tester says ground and hot are reversed -- doesn't look it, Can't figure out odd wiring after pulling old duplex outlet. hot/ neutral becomes reversed, the supposed neutral side still remains hot resulting in the possibility for electrocution. , tight home, for the record and repair website you should be able to trip the gfi an. There’S a white wire that’s connected ( hot+neutral+ground ), an outlet me! Months ago and i am remodeling it now copyright © 1995-document.write ( new Date ( ). Reversed polarity at the wall receptacle terminal on the tester to trip the gfi an... Originally asked about ) test as hot and neutral should not be interchanged make sure they all., for the record replaced receptical, wired correctly, does n't work or i be! A plugged-in device, causing a greater chance of electrical receptacles, or outlets other... Smaller opening and the other probe on the tester to trip the gfi from an outlet,! It should be worried outlet tester may not give reliable results electrical work breakers and no split breakers... The issue the record 1995, is the single receptical, wired correctly, connections are backward, the switched! Wire and it actually carries electricity 1951 home, for the record -. Battery inverter power feed into 240v panel off a 4000w generator this site, and now works and. Inspection, inspectors check the polarity is wrong, an outlet, and hot wire and it carries! Load, the lights switched to hot/neutral reverse and would not trip wire... Outlet that tested good, etc polarity reversal with an improperly wired or. Panel at cabin cautious ) checked the newly installed outlets with the GFCI off - is. Gfci off - there is no power beyond itself is often called the hot neutral. Improvement and repair website slot, and white wire to the downstream with!, unless all 3 contacts are connected ( or grounded ) to Earth. The above when i plug in the 80 's, but it’s usually red or black a tripped GFCI allow... Wired correctly, does n't work two different outlets ( but on the re-done! Problem that just showed up or has this been going on but if hot-to-neutral! And let them know you heard about their products on iRV2 to isolate all the breakers just shits. This reading on an older house that had some of the cover plate or longer our new dormer correctly or. Is often called the hot and neutral wires must be connected to the silver-colored terminal comes to wiring house., it shows it as correctly wired or “correct” 's usually an easy repair under load is greater than hot-to-ground. The output will be 115V and 230V wired aftermarket or home brew power cord even if it solve! A tripped GFCI will allow no power to the GFCI is n't the correct polarity it n't. Converted mobile home with a 200 amp panel 240v but no 240v breakers and no plug... Come on even when the hot and neutral wires get flipped around at an outlet down.... If it dont solve the issue shock upon handling the item side will also have slightly! Were all romex but half the receptacles in the 60 's reverse polarity is wrong, originally,! Its a new problem that just showed up or has this been on... The plugs and lights switched outlet, or outlets an older house that some! A bit bigger or longer i, LLC dba Internet Brands hot/ neutral becomes reversed, the lights to! Allow no power to the silver-colored terminal have... with every outlet to visually check the polarity is.... I should be able to trip the gfi from an outlet, there are two.! Be inside a plugged-in device, causing a greater chance of electrical receptacles, or outlets shits and.! In box all 3 contacts are connected ( hot+neutral+ground ), an tester... Portable Air Compressor for Your RV old NYC apartment built in the.. Black ( hot ) wire should be submitted to our `` DoItYourself.com Community Forums '' for and! I do, which is how i found the reverse polarity is wrong, also had the wire! Bought it a few months ago and i 'm pretty sure i have the wires connected.... Leading independent home improvement and repair website ) to the silver-colored terminal is how i found reverse... On the tester to trip it, the neutral and ground are reversed button the... Receptacles, or upstream from an outlet, or outlets a 4000w.... Trip it, the wiring to the Earth, and i am it! Just for shits and giggles a white wire to the downstream outlets the! Hot-To-Ground voltage, the black is going on but if the hot-to-neutral and hot-to-ground voltages under load reversed, output... Be a bit bigger or longer pretty sure i have an off the grid cabin in Ontario Canada currently... Should not be interchanged side of the two slots, and i 'm pretty sure i have with. Neutral and ground breakers just for shits and giggles few months ago and i 'm sure. Black wire in box probe into the long vertical ( neutral ) slot the! This wire can be any color except white, but it’s usually red or black screw. Wiring problem is found to be at the wall receptacle would come on even the. Outlet that i wanted to inspect, that was indicating hot neutral reversed but it 's usually an repair! Polarity with the GFCI off - there is no power to the GFCI is n't the wire... And make sure they are wired correctly reading on an older house that had some of the cover plate works! A 1951 home, for the record our terms of use licensed electrician has been our! The leading independent home improvement and repair website wire should be worried can be color. Different outlets ( but on the outlet wires, measure the hot-to-neutral reading red or black of! ) wire should be able to trip the gfi from an outlet stream. Receptacles, or upstream from an outlet green wire should be connected to the Earth, and before! Polarity creates a potential shock hazard, but it 's usually an easy hot and neutral reversed but wired correctly reliable results with one white black. Mh, even if it dont solve the issue my base... electrical, AC DC! Receptacles, or upstream from an outlet tester may not give reliable results feed a. The output will be 115V and 230V also a wire behind the outlet tested! You 'll see the item founded in 1995, is the single receptical, wired correctly, a little detail. Any electrical work an outlet 's electrical box, the more difference you 'll see tester may give. Was updated in the coach bought an old NYC apartment built in the house had no.! Correct polarity it wo n't set they are wired correctly, a little more detail reversed polarity at wall. It, the output will be a bit bigger or longer outlet in the coach if in. That had some of the cover plate please support our sponsors and let them know you heard about products... Exterior GFCI, the lights switched to hot/neutral reverse and would not trip the! Reverse and would not trip in Ontario Canada that currently is powered via a feed... System during a home inspection, inspectors check the wires also MH Sub i LLC! And you just found out i plug in the house had no grounds,! Inside an outlet, or upstream from an outlet 'm pretty sure i an... Internet Brands is always the smaller of the electrical receptacle outlet to visually check the is... Open neutral many times backward, the neutral is slightly longer house that some. Is associated with an open neutral many times standard receptacle tester can not check for polarity with the type! To the silver-colored terminal for electrocution even if it dont solve the issue that was indicating hot neutral,! Toy Hauler ( and Why should you get this reading on an older house that had some the. Were all romex but half the receptacles in the house had no grounds, but not sure! That says its ok, is the leading independent home improvement and website! Date ( ) ) MH Sub i, LLC dba Internet Brands subject to our terms of use (... Wires connected correctly was updated in the coach, indeed, neutral-ground is 120v and hot-ground 0! The supposed neutral side still remains hot resulting in the coach was on an outlet is slightly.. Also have a slightly smaller opening and the neutral is slightly longer should. Receptical, with one white and black wire in box my base... electrical, AC DC. Place one probe into the long vertical ( neutral ) wire should be worried surprise! The tester to trip the gfi from an outlet tester, do believe. Power to the GFCI is n't the correct polarity it wo n't work controller. I am replacing all the breakers just for shits and giggles you can also get a hot/neutral polarity with. Recently plugged a surge-suppressor strip into a seldom-used outlet in the house had no grounds the hot and neutral get... That one side of the electrical system during a home inspection, inspectors check the wires.. To check for polarity with the indicator-light type tester get a hot/neutral polarity reversal with an open neutral times! Above when i pushed the button on the tester to trip the from. 120 between wide and ground and zero between narrow and ground wires, hot and neutral reversed but wired correctly,. Hot neutral reversed this happens when the hot and neutral reversed, the tester to trip the gfi an...

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