you have not given enough information . If as in a TT system there is a higher resistance to Earth than there is to Neutral. There are no polarities in AC, so live and neutral can get interchanged without any problem in AC circuit in appliances. blows it must be replaced. :) It is when: - Live wire is connected to Neutral terminal of the socket - nothing is connected to Live terminal of the socket - ground wire is connected to ground terminal of the socket :o) \$\endgroup\$ â Steph_P92 Dec 21 '18 at 21:18 from the consumer unit to the shed there is only one cable which leeds to a double socket. My car got wet inside when I put some frozen wood inside. RCDs aren't concerned with earth faults - they work by looking for imbalance in the line and neutral current flow. Well, if no, then we certainly do! Post you findings back once sorted, good to hear some feebback as in to where/what the fault was and see if we were right or not, :-) Dougie -----Dougie Hi folks, so here was a new one I came across today. How do I repair the scratches my cat made on my Ikea cabinets. DIY Doctor has the answer! Opened up the switch at the bathroom door to have a look - no neutrals. If there is an Earth to Neutral fault, and also a Live to Earth fault. Note: This post is talking about UK (220-240V mains supply) ... > only concerned with earthing faults, not live/neutral reverse polarity > type problems. Often, it takes the form of a screwdriver with the lamp connected between the tip of the screwdriver and a single lead that projects out the back of the screwdriver. I found by chance the case when "live neutral reverse" is displayed ! Why RCDs trip when faults between neutral and earth occur, and why switching off a circuit breaker / MCB is not isolating the circuit properly. Live, neutral,and earth, are labels that are used to convey some information on the use of each wire. The test light is an electric lamp connected with one or two insulated wire leads. The Thai 3 pin socket outlets have the live on the left side, neutral on the right and earth at the top when looking from the front. You are correct in thinking that in a typical two wire AC loop/circuit, both wires carry the same amount of current (amps). The fault could of been put in place if your meter has been changed and the spark connected it backwards . the metal of a caravan would remain live and electrocute anyone who touched it. It may be small but not insignificant! either way you need to know what to look for to see if the line is hot or just floating somewhere. The question is, who swapped them round. Also in some older appliances, the grounded (neutral) conductor was bonded to the chassis of the device. 3- It depends if a certain unit trips the breaker and not everything else the unit may be your problem. Another problem with reverse polarity at a socket is that if there is a Neutral-Earth short or fault in an appliance, this in now a Live-Earth fault except there is now no plug fuse in the fault path, and if the neutral earth is reversed feeding the fuse box then there is no fuse at all before the esb one. This is an example of âFault Locateâ showing line (live), neutral, reverse. However, when it comes to wiring in house, live and neutral should not be interchanged. It will then be necessary to attach the brown live wire to the terminal âLâ out. most likely thing off the top of my head is a neutral has come adrift bihind a faceplate somewhere or in the consumer unit. the neutral should not be live (hot) unless someone incorrectly wired a circuit somewhere. The current will have two return paths to choose from, it can go via the Earth, via the Neutral, or via both. You plug lamps, appliances or other corded equipment into it. Or to put it another way, Live and earth have been swapped round. Needs the sparky alright. Red/brown to Live terminal, and black/blue to Neutral terminal?? Now it stinks like dirty socks. It is also why your volt meter shows no voltage difference between Live and Neutral because you are actually checking between Neutral and earth. Hey Guys- This was on an older house that had some of the electrical re-done. We do have neutral cables, we call the ground cable earth. While a neutral earth fault can be a terrible nuisance a floating neutral can be anything from inconvenient to seriously life threatening. As the motorhome is protected by a ELCB that will switch off both live and neutral in the event of an earth fault you are protected. The outbound cables will be the twin core and earth. What are the common signs of electrical issues in a building? could possible be a faulty appliance that you are using some where on the ring. Wouldn't it make more sense to make them chest high? We have teamed up with the industries best to help you find a trustworthy tradesman local to you! The fault you have sounds like a floating or intermittent neutral, which is a very different type of fault. So the live and neutral are transposed compared to the UK convention - the same may be true for the German configuration ? How do I fix? Hi again I have had no work done recently no problems for two years. Uk plugs _are_ fused and when a fault occurs it disconnects the "Live". Each page also comes with pictures and a video to make completing those jobs even easier! If the polarity is reversed and a fault occurs, they will cut off the neutral. European plugs are unfused, and RCDs used to a greater extent. How can I fix the smell? Live to earth reverse means that the Live and Earth are reversed. Also removing the offending lamp from the plampholder would break the supplyto the neutral killing your live neutal. DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? What fuse ? Don't understand. So i think the sparky who installed the CU has made a big mistake and somehow connected live neutral reverse. Keep up to date with our DIY projects, tips and latest deals. You can sign in to give your opinion on the answer. In fact a fuse does not 'trip', it either blows or melts depending on the type of fault, whereas an MCB or RCD will 'trip'. 4742 N 24th Street Suite 300 PMB #259 Phoenix, Arizona 85016 . So if there's a fault somewhere, you could potentially become a path to ground. You don't want a swapped over circuit to disconnect the neutral as it still leaves power at the appliance. Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. We had ours replaced with a new one and upgraded to a higher rating. So, both wires could be considered live wires. 4- Remember if the fuse or breaker goes you have a problem that needs a professional trouble shooter to look for a short circuit that could cause a fire. A live and neutral reversed, whilst potentially hazardous will not cause a fuse to 'trip'. Example - a lamp blows it every time you plug it in but if you plug a fan into the same receptacle and it doesn't blow it then your appliance is the cause. Ok I thought, neutrals obviously looped at the ceiling roses. For many newer devices, such as electric drills, it makes no difference - the device has a double-pole switch and when âoffâ, both wires are disconnected from the motor. Armed with this understanding it should be very easy to ⦠When I stuck a socket tester on the plug socket it tells me that the live and neutral is reversed. The 30A fuse keeps tripping I have checked the sockets for loose wires cannot see any. The UK wiring standard only requires switching on the live circuit at sockets, where as in Europe they switch both live and neutral. Like I said if your using a plug in tester a dropped earth could give a live neutral reverse, it wouldn't trip your RCD, you need to use a proper test meter or get a sparkie to find the fault Sparkielev, Oct 1, 2019 #6. peter palmer Super Member. Grab your copy now for all the DIY help you need right at your finger tips! most often the kettle or toaster that cause these problems. What do you think of the answers? Yes, the device will still work. A live and neutral reversed, whilst potentially hazardous will not cause a fuse to 'trip'. If you have had an external RCD or RCCB fitted then again it could be wired backwards . The neutral is now blue but has always been black. If it's a TNCS earth system you could possibly get this fault on live neutral reverse turn circuit off test it before removing sockets and check for wrong polarity He's already confirmed polarity on a socket on a different circuit, its not reversed at the origin. \$\begingroup\$ If you have 230V load(s) across the two live conductors the neutral is not even connected, hence no current. If it is within a well-designed appliance it will be inconvenient. Join Yahoo Answers and get 100 points today. the electricity goes 'out' on the live and 'returns' on the neutral they both carry current. This means that, if the live or neutral wires develop a fault causing any exposed metal to become live, there is a risk of electrocution as electricity can attempt to find its way to earth via the human body. Unless you have work done the wires cant change them selves .You might of lost the neutral . I think you should be getting a qualified person to test and inspect for the possible fault. Why are electrical outlets so close to the ground? ie. So i pop the cu cover off and all looks ok (correct coloured wires in the right postions), the incoming tails look ok (the correct coloured tail in the correct terminals). In most domestic applications, the earth and the neutral are usually connected together meaning that the voltage between them is small. If the neutral is connected to the mains neutral, you won't find the fault. The one in the plug or the one in the fuse box?Unless the socket has recently been fitted or rewired and has been in use previously I don't know.What is plugged into the socket at the time this happens. Still have questions? Do you mean the socket is wired incorrectly? North Valley: 602-318-1164 If the RED light is lit it indicates that the Hot and Neutral lines are wired backwards. But when I pushed the button on the tester to trip it, the lights switched to Hot/Neutral Reverse and would not trip. If for some reason the live and neutral conductor wires are reversed then a âreverse polarityâ condition is produced. 4641 W. Whispering Wind Dr. Glendale, AZ 85310. All domestic ones have a 30 ma trip although other values are used. You may have lost the connection for the neutral inside the panel also. http://woodworkingprojects.enle.info/?1L16. 17 possible fault conditions ⢠Mains polarity check ⢠30mA RCD check This is an example of the Earth Loop Test showing green â good, less than 1.8Ω. 2- If the circuit breaker trips, it must be reset. 6424 E. Greenway Pkwy. It needs an electrician to resolve the problem. It very much depends where it is. Furthermore a UK plug will only go into a UK socket one way; the reason for this is to maintain the correct polarity. a live earth reversal refers to the live and earth (which should not normally carry current) you are talking about the live and neutral (which do) moggy1968 Earth sleeving should be used to cover the earth wires before connection to the earth bar. The UK 3 pin, 13 amp plug is designed to be used on ring mains, therefore its fitted with a fuse to protect against overload. A neutral cable should be connected from the bottom of the isolator to the earth bar. NO WAY TO ANSWER THIS QUESTION THAT I CAN SEE. The current will choose the path of least resistance and return via the Neutral. The live you can do with the circuit breaker, but be careful - test with your neon screwdriver first, and make sure nobody else goes and turns it back on! This leaves the faulty appliance still live, which could prove fatal, particularly if there was also an earth fault e.g. Bought a humidifier and now my door has swollen? Is it the appliance that is at fault? ⦠Is the socket wired correctly?? it seems you have lost the neutral connection somewhere, possibly at house supply end, check connections first, Powered by phpBB ® Forum Software © phpBB Group, General Building, Self Build and Renovation, Planning Regs, Project Management and Safety, LIVE / EARTH REVERSE - 23 volt in live and neutral, Wiring a new Light Fixture With Brown Live, Blue Neutral and Earth. As long as you understand this, then reverse polarity becomes less of a worry. If this type of appliance was plugged into a reversed receptacle, the entire chassis would be energized. Get answers by asking now. Why does my landlord keep turning the hot water heater down? How did you measure this and may be able to then spread some light on it! The fuse must always be on the live supply, so that in the event of a fault, the fuse will fail and the appliance is isolated making it safe, as the supply is stopped at the point of it entering the plug. if your live and neutral join together you have a dead short and it will blow a fuse or trip an MCB. Read detailed information? Have you had an old fuse box replaced . A neutral to earth fault means that the neutral conductor side of the circuit is leaking the current rather than the live side. Don't take chances with electricity. Based on the neutal borrows for a light anyway. Its a simple enough fault to locate. White is not used. The key bit is that you have to disconnect both live and neutral to find the leak. Specifications Socket wiring check LEDs flash red plus warble tone. This is the first of such along list of checks . The green and yellow cable prevents this ⦠If either of the green lights are NOT lit then it indicates a fault with the wiring, be it an open ground or an open neutral. cleaning intergrated Hotpoint gas intergrated Hotpoint gas hob? New panels that were all romex but half the receptacles in the house had no grounds. On this exterior GFCI, the tester showed it had a ground. Why do you think the polarity is reversed. If you have any combination of 115V loads that are not perfectly balanced then you will obviously have the nett imbalance of current in the two live lines returned through the neutral. No and no. Are there tools I can use to detect the condition of my electrical system at home? Do I Need the Earth Connected for 2 Core Live and Neutral Wire. Scottsdale, AZ 85254. This would cause the neutral to "float" making it appear hot when you measure it. By the word socket you probably mean Receptacle (with the holes either round or slots for a flat bladed plug). We also use combined RCD's & circuit breakers called a RCBO, but 99% of the time they will only break the live/line conductor. 5- One last bit, it is possible the breaker is old and tired and needs to be replaced or in our case the 40 Amp breaker is one of those GFCI (Ground Fault Circuit Interrupter) that is designed to trip on the slightest difference between the ground and neutral wires for safety. 1- If the fuse? Was sent to put in a new bathroom fan today to an old Barrats house.
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