Why does the circuit breaker trip?

The tripping of a circuit breaker can be caused by many different reasons, ranging from a malfunction of the product itself to a short circuit in the wiring. You can independently determine why the mechanism for disengaging the power is triggered, and doing this will not be at all difficult even for an inexperienced electrician. Next, we will tell the readers of the site electricianwhy the machine is knocked out in the shield and what to do to solve the problem!

Network congestion

The most common reason why the circuit breaker (AB) is tripped is that it simply did its job - it protected the wiring from overload and further failure. When we considered technical characteristics of machines, then it was said that each model has its own rated tripping current: 6, 10, 16, 25 A, etc. Now, if you simultaneously turned on several powerful electrical appliances whose current exceeded the set point, do not be surprised why the circuit breaker in the house knocks out. For example, you have a 16A automatic machine on the dashboard (a classic situation for old wiring) and at one point you turned on the washing machine, air conditioning, electric kettle and boiler. The load on the network increased markedly, as a result of which the AB disconnected, thereby protecting the wiring.

Disconnected photo circuit breaker

There are several ways to solve the problem. The first and simplest one is to turn on powerful household appliances in turn so that they do not arise overload. The second is to replace the machine with a 25-ampere. This is allowed to be done only if the wiring can withstand the load (copper, core section of at least 2.5 mm2) The third, most reliable - replace wiring in the house to a new one that will be able to withstand powerful household appliances.

The reason why the machine knocks out is clearly explained in the video:

What to do if an AB trips under load?

We draw your attention to the fact that after the machine knocks out, if it is with a thermal release, it will not work immediately. This is due to the principle of operation of the product. When the mechanism cools down (time may reach several minutes), try again to raise the lever to the "On" position.

Home appliance malfunction

If the machine knocks out often and approximately at the same time period, it is highly likely that one of the electrical appliances is faulty. For example, if you notice that the circuit breaker is activated when the washing machine, electric stove or water heater is turned on, turn off this technique and see how the device behaves without electrical appliances. Does the trip happen? It is necessary to look for a malfunction in one of the connected "culprits". About, how to repair home appliances do it yourself, we told in the appropriate section of the site.

You can quickly find a faulty technique using the exception method. Disconnect all plugs from outlets and plug in alternately. On a device that is short, the circuit breaker will trip under load.

Search for faulty equipment

If you disconnected all the equipment from the network, and the machine turns off, then it may be in the wiring. What to do in this case, we will describe further.

Shortens wiring

Another reason why AB is often knocked out is wiring short circuit. The phase in some place touches zero, as a result of which a short circuit occurs and the machine performs its second protective function - protection against short circuit. If all consumers are disconnected from the network, and the operation occurs, you need to completely check wiring. This takes a lot of time and, in addition, you need to be careful to find the fault.

First of all, you must disassemble all sockets and light switches, check the quality of the connection of conductors to the terminals. If the wires are loose, the screws must be tightened. After the outlets, go to the junction boxes. Make sure that junction box wires high-quality, there are no exposed areas that can be short. After the boxes you need to go to the lamps. Very often, novice electricians forget to check the chandeliers if the machine knocks out without load. The verification technology is similar to sockets - you check the reliability of connections.

Revision of electrical wiring

Last of all, you need to check the wiring, which in most houses and apartments is hidden (in the wall). In this case, it is best to use a special device that can quickly and accurately find a short circuit. However, at home, it is unlikely that someone will have it, so you can get out of the situation with a multimeter. About, how to determine a short circuit in the wiring, using the tester, we talked about in the corresponding article. If this does not help, we recommend calling the master, who, using a thermal imager or other devices, will find a short circuit and repair it.

AB failed

Well, the most rare reason, which is also not excluded, is the poor quality of the machine, which is knocked out because it is defective. If you are sure that the wiring and household appliances are intact, and overload does not occur - check the machine by replacing it with a similar one. We can say with confidence that this will help to fix the problem. In order not to encounter such a case in the future, we recommend that you familiarize yourself with rated by the best manufacturers of circuit breakers and choose one from the list.

What else could be?

In addition to the above reasons why the machine is knocked out in the shield, there are others that rarely occur. Briefly consider them too.

If the circuit breaker operates when the bulb burns out, do not worry, this sometimes happens. The fact is that when the lamp burns out, a short-term overload occurs and if the rating is 6-10A, it will quite possibly knock out. With LED and fluorescent lamps this will not happen.


Sometimes on the forums you can meet a situation where the AV knocks out when the stabilizer is turned on. Here, too, their own nuances associated with the operation of the device and your carelessness. The fact is that voltage stabilizers at startup create a current that can exceed the rating of your machine, as a result of which it will knock out. There may also be a reason in the stabilizer itself. Cheap Chinese models are famous for their marriage.

If the operation occurs when the light is turned on - check the lamps with a multimeter. About, how to use a multimeterWe also told.

The banal reason why the machine is turned off is the incorrect connection of this device. If the cores are poorly pulled to the terminals, heating occurs in this place, as a result of which the thermal release can trip. Visual inspection will help determine the cause - a melted case and wire insulation. If the plastic has melted too much, it is better to replace the circuit breaker. In case of minor damage, it is allowed to simply tighten the cores with a screwdriver.

Installing the machine in the shield

We move a little away from the topic, but nevertheless we note an important one. If you have introductory and group machines in your switchboard, it will be easier to find the reason. Knocks out AV on input, without group? Check for correctness. flap assembly. If a certain automatic machine is switched off below the main one, it means that in this group there is a malfunction (lighting, sockets or a separately connected hob).

It happens that the problem occurs after flooding the apartment. Water gets on the connection of the wires and if they are twisted with electrical tape, it sticks up, resulting in the closure of the contacts. After the flood, it is necessary to make an audit of the wiring so as not to reach the situation when the circuit breaker starts to operate.

So we have provided all the reasons why the machine is knocked out in the shield. Please note that this situation can occur both in the apartment and in the private sector. You need to act in the same way, even if the circuit breaker on the pole opens! If you are not confident in your abilities, it is better to call a wizard who will safely find the malfunction and fix it!

Interesting topic:

What to do if an AB trips under load?

(33 votes)
Loading...

90 comments

  • danil

    Hello, I have such a question. Periodically cuts the opening machine in the shield, about a day later, after two. there is practically no load (kilowatts at this moment are definitely not included). It sometimes turns off by itself, or when the light is turned on (I click the switch in the bathroom and cuts out, the vacuum cleaner turned on once, and it went out). He called an electrician, he did not determine the reason, changed the machine in order to check if it was the cause, but the same thing happens with another machine. What could be the reason? is a short circuit happening somewhere? Why does it turn off when, for example, turn on the light in the bathroom? Thanks in advance.

    To answer
    • Admin

      Hello! Most likely, the reason is that the wiring is short. As we wrote in the article, in this case, you need to make an audit of junction boxes, switches and sockets. If this does not help, you need to call a qualified specialist who with a special device will check all the hidden wiring in the walls!

      To answer
      • danil

        thank you very much for the answer. check it out. But what kind of special device do you mean?

        To answer
        • Admin

          A thermal imager or something like a TDR-107 digital reflectometer. Now there are a lot of devices for detecting short circuits, although their price is high, so it’s better to call a master, it will cost less.

          To answer
      • Xxx

        Good afternoon. In an apartment in only one room, when connecting smart tv, the machine is knocked out, what could be the reason?

        To answer
  • Alexei

    Hello! Tell me please! bought a hob, connected, started cooking, cooked, and when they wanted to turn it on again, they found that the machine was knocked out on the stove! and the machine knocked out when the stove was turned off! I changed the wire from the outlet to the panel now it began to cut down every 5-10 minutes! and when you cook. I checked the wiring, which did not melt!

    To answer
    • Admin

      Hello! The rating of the machine and the power of the plate please tell me! And yet ... tried to replace the machine?

      To answer
  • Yulia

    I really need advice, of course I read the article, but I still have a question.
    My air conditioner was installed 2 years ago, while last year they practically did not use it - they turned it on three times for several minutes and that's it, but this year they used it for about a week and a half. He worked for cooling, the cork was knocked out in the room, went into the staircase, turned on. Overload, as I think, could not be, except for the air conditioner and the light bulb in the room, nothing worked, in the kitchen - only the refrigerator.

    I came in and turned on the air conditioner, worked for 15 minutes, and again knocked out the cork, went to turn it on, the cork did not work right away, I had to click.

    I don’t understand what could be the reason, in the entrance there is an ordinary automatic machine, as I understand it at 16 A, the wiring is of course old - the house is Khrushchev’s, but it’s cutting it down to the air conditioning.I read about the air conditioners, that there may be a problem in the external unit, that it needs to be cleaned, but I repeat, they practically did not use the air conditioner. The external unit is behind the balcony and it is not visible, so you need to order a tower to consider it. Therefore, advice is really needed, what could be the reason, maybe the reason could be an outlet for the air conditioner - it is without grounding. Thanks in advance for your answers.

    Sincerely, Julia.

    To answer
    • Admin

      Hello Yulia! It's not about grounding. Most likely, the fact is that the external block is very dirty. Another possible reason is a short circuit in the wiring, in the cable that goes to the outlet for connecting the air conditioner.

      To answer
    • Garry

      Yeah ... That's right. I'm good at electrics. Well, I don’t have KZ !!! There is also no load of more than 1 kW (unless two refrigerators cut compressors at the same time). Well, tell me - there is no load, only comp + refrigerators work. Night. It works for no reason at all !!! Although at another time it’s quite calmly pulling 1 kW of an electric kettle, or 5 kW of an electric heater !!! The only suspicion is that either voltage surges or Chinese packets are complete @ -but!

      To answer
  • Yulia

    Thanks for the answer, only it’s not clear to me then to call an electrician or air conditioning repairman from the company that installed it, tell me, please.

    To answer
    • Admin

      in your case the situation is 50 to 50. but I think the problem is in the air conditioner

      To answer
  • Arthur

    Hello, explain the reason, the new wiring, everything is new, the machine warms up to 16A, it sometimes knocks out, with the air conditioner turned on, there are three household appliances on this machine, a TV, microwave and air conditioning, it does not turn on at the same time

    To answer
  • Sasha

    Hello!)) Please tell me ... I have a problem with lighting, the machine knocks out after 2-3 hours, and maybe after a day and two, it sometimes knocks the machine itself, and sometimes it knocks out the introductory on the stairs ... what is the reason tell me? head for 3 days and I do not understand what is the reason

    To answer
  • inna

    Knocks the shield on 16A, nothing is turned on after a while. Turn it on, but after a period of time it knocks out again. How to determine from what. The wiring is new ..

    To answer
    • Admin

      The verification technology is described in the article, were you guided by it? The item "Shorting the wiring."

      To answer
  • Alexander

    It knocks out a machine when a second monitor is connected to a laptop via RGB, or a TV via HDMI. Knocks out at the moment of connecting the cable to the monitor or TV. If the laptop is running on battery power, everything is fine; at the moment the laptop is connected to the network, the machine is knocked out again. What could be where to start?

    To answer
    • Admin

      We recommend changing the machine to a similar one, it happens that the machines start to degrade.

      To answer
  • oxana

    I have such a problem. new apartment made wiring. for some reason, it began to knock out plugs, the machine that goes to the bathroom when you turn off the light there and the sockets do not work in the bathroom. even at night when nothing works he knocks out and in the entrance too. tell me what could it be?

    To answer
  • Elena

    the last month the automatic machine has been constantly knocking out in the apartment it’s impossible to turn on anything ... some electricians have been called, some do not know what the problem is, others say that the problem is not in the internal wiring but in the common closet ...
    can someone else specifically make so that there is a high voltage and knocked out the machine?

    To answer
  • Alla

    Hello, please tell me in our boutique in the shopping center, when you turn on the steamer it knocks out the light, although the steamer is new from us, they bought it just a month ago

    To answer
  • Tatyana

    An introductory machine works at my apartment, which is located on the stairwell. Accordingly, it works in the apartment too. It does not depend on the included devices. It can also work when everything is turned off. After turning on the machines, everything functions normally for 3-6 hours. Sometimes the problem goes away for weeks. The wiring is new. More than a year after repair. Problems never struck. What is the reason. Thank.

    To answer
  • Tatyana

    Hello! We’ve moved to a new building! They hung a fluorescent lamp in the hallway, it was hanging in the old apartment, there were never any problems. But as soon as you turn it on, the machine is knocked out, and this is common. And this does not always happen, or maybe after 10 turns on, maybe after a while. The load in the apartment is small, the automatic machine is 32A, it sometimes cuts out when I just entered the apartment, I turn on the BAM! lamp?

    To answer
    • Admin

      It is necessary to make an audit in the chandelier, similar to the removed insulation on any fold or in the cartridge.

      To answer
      • Yuri

        Hello! I have the same situation, only a new chandelier from the store. It has 6 LED lamps. I inserted it one by one and checked that it was shining, on the fifth light bulb the introductory machine began to be cut down. Left four light bulbs. The next day I knocked out again, now three bulbs, but it still knocks out about 5-6 on each. The house is new. When one light bulb hung in the wire with the cartridge, it also knocked out the machine once. This fact slightly removes suspicion from the new chandelier. So what could be the matter ?? Thank.

        To answer
  • Eugene

    Hello!
    Faced such a problem.
    For the weekend we went to my parents in the village. When they returned, they found that the equipment connected through the sockets in the kitchen was turned off. Of the working appliances in the kitchen, before leaving, there was a refrigerator and a clock indicator on the microwave, the remaining appliances were plugged in, but did not work (i.e. the load was small). Outlets in the kitchen under one machine in the dashboard.
    They opened the shield, the corresponding machine was turned off. Included. After 5 minutes, he turned off again. After that, it does not turn on. When you try to turn on, the lever immediately drops. There is no smell of fused plastic or short circuit. Disconnected all appliances in the kitchen from outlets. Checked all the sockets. The machine still does not turn on.
    Tell me what is the reason.

    To answer
    • Admin

      Hello! Is there a spare machine with the same value? It’s better to call the wizard for diagnostics, but if you want to find out the cause of the circuit breaker yourself, make sure that it’s not the machine itself. Try replacing the AB in the shield and turn it on.

      To answer
  • Vladimir

    New home, knocks out entrance AV. Is it possible that this is due to the neighbors?

    To answer
  • Albert

    good afternoon, in a private house, in the morning I found out that the machine had turned off - the water supply through it and one room (lighting sockets) was hooked up, he turned on the machine, it was buzzing and sparking, turned it off and went to work, I was sitting at work and I thought it would be easier to identify the reason, without buying an automatic machine in advance, since the Schneider company and the contacts I held out 6 months ago, the pump can be reached 50 meters from the well, what do you recommend? is it not dangerous to disconnect everything in turn by the method of exception, while constantly having to turn on this machine, and it sparks not badly. the essence of the question is how easier, without unnecessary costs and faster to solve the problem, thank you in advance.

    To answer
    • Admin

      Check pump for insulation problems.

      To answer
    • Admin

      Also try replacing the machine with the same one at face value, maybe it really is in it.

      To answer
      • Artyom

        Hello, I need your help! My wife and I opened a hairdresser in the basement, there is no heating on electricity, and plus in the next room Dentistry knocks plugs every time? Tell me what is the easiest way to fix it? And no matter how winter is around the corner! Thank you

        To answer
  • Denis

    Hello, I have such a question
    I work in a bank
    I connected a thermal curtain to a separate machine in the machine panel somewhere about 9
    When the curtain is turned on, it works for 10 minutes and knocks out the machine, and once in general 3 automatic machines of the neighboring ones burned down
    What is the problem ???
    The machine is set to 16 A

    To answer
    • Admin

      Perhaps the terminals on the machine are relaxed. Bad contact results in heating. The quality of the contacts also depends on the manufacturer, the cheaper the company, the stronger the heating of the contact transition.

      To answer
  • Vladimir

    I have two meters on the site, 3 phases enter, the main one is in the house, in the house there is only lighting. The duplicator is in the store and there is a single-phase stabilizer there, there are refrigerators and split systems. Why does the opening automaton knock out? not in the store, but in the house? What could be the cause? Thank. Waiting for an answer.

    To answer
    • Admin

      Hello! All reasons are described in the article. What have you already checked?

      To answer
  • Alexander

    Good afternoon.
    I have a situation like this. The wiring was changed in 2012. Inside the apartment they put their machines that are already connected to the machine on the ladder. the cage. and the extreme machines are the same (in my opinion 20)
    Everything worked perfectly. at the same time, a condo with a dishwasher and an air grill could work.
    but for about three weeks now, the slalom turned off automatically on the stairs. and the one that does not turn off in the apartment. and he seems to be changing those and devices.
    _____
    there is one point. we began to make major repairs in the house and are also connected to electricity and sometimes turned off
    but the machine does not cut down from the neighbors, but I have yes
    _
    repairmen themselves say that we have a problem.
    _ where do you think the culprit is?

    To answer
  • Marina

    help advice. in a new building, after a repair, an automatic machine was knocked out, repairs were completed in April, and the beginning of June was about to be knocked out. for no reason. everything worked fine, but once knocked out and since then it happens constantly in a chaotic manner. we don’t live in the apartment, we come sometimes. the equipment is not connected. We turn it on only when we arrive for a couple of days. That is, the machine knocks out without load. at first we rarely knocked out, we did not pay attention to it, but a few days ago we knocked out all evening from 6.30 p.m. every 15-20 minutes, at that time only a laptop and a refrigerator worked. the next day they called the wizard according to the recommendations, he climbed in the shield, payment picked up and advised to hope for the best. after which the machine was knocked out again at night ...

    To answer
    • Admin

      Have you tried corny replacing the machine with another? Maybe the marriage got caught. And of course, the lighting group needs to check everything, wire connections.

      To answer
      • Marina

        they didn’t try to replace the machine ... the electrician, who was called, said that the next time, if he continued to knock out after manipulating the shield, he would need to check all the sockets, and if it wasn’t the matter, then we just had to open the walls ... we were terrified and despair ... check the lighting group - are the breakers to take apart, look? Sorry, I'm a complete zero in an electrician. and also I have a question about machines. our two-room apartment costs 1 machine. 1 electrician says that since the house is new and the wiring is new, that’s enough. Now, after the repair, 2 electricians laugh at us and say that each room needs a separate automatic machine, and plus if the oven is electric, then it you should also output a separate machine. I would like to know the opinion of an uninterested specialist.?

        To answer
        • Admin

          Sockets, switches, etc. must be checked first! Lighting group - all lamps, junction boxes, etc. In general, you need to check all the wiring.As for the machine, what is its face value? For good, it is advisable to divide the wiring into groups and put each machine on each group, including an electric oven. We talked about this in detail in the article - https://my.electricianexp.com/en/kak-razdelit-elektroprovodku-na-gruppy.html

          To answer
          • Marina

            Uzo 40 amperes. I am advised to disassemble it, remove the part that works and turns off the machine. Because they believe that these are Uzos are hypersensitive and most likely the whole problem is in it. What do you think?

  • vital

    Good afternoon. It was like this, I set up on the VPU street with an iron shield, everything worked. Then after 4-5 days I moved the VPU to another place, there was enough lead-in wire, but there is no secondary. I had to grow twisting, of course, in a run-up, and after that I began to knock out an automatic machine. The chief changed it, began to hold it a little longer, but it still knocks out Tell me the reason.

    To answer
  • Marina

    Good afternoon! Three weeks ago we bought a 2000 W electric grill. Cooked without problems all this time. But yesterday, 5 minutes after switching on, an automatic machine was cut out at the entrance. We thought that the network was overloaded, because turned on in the evening and the TV worked and the light was on. We decided to try the next day in the afternoon with the appliances turned off. A machine gun was knocked out in an apartment. We went to the store, they turned on the device for several minutes, everything is fine. Tell me, what could it be

    To answer
    • Admin

      Hello! So the matter is in the outlet, it is short. Have you tried connecting the electric grill to another outlet?

      To answer
      • Marina

        Yes, and the machine was also immediately knocked out. Although for two weeks now I have been using them and incorporating styrene into them. car, iron, etc. and have never knocked out

        To answer
      • Marina

        It only works on the grill. And they also tried grilling with their parents, it works fine

        To answer
  • Eugene

    Hello! the wiring is absolutely new in the apartment (copper) cuts down the automatic machines constantly, even the electrician could not find the reasons, there is no short circuit, once again I repeat the wiring is completely new, the night light is plugged in, the laptop is on charge and wifi and it cuts down anyway! Tell me what could be the reason !? the machine is at 32A

    To answer
    • Admin

      Well, even if the electrician could not find the reason, then we remotely are even more powerless. Have you tried changing the machine? Check how the circuit breaker will behave without load at all (if all consumers are disconnected)? Call another electrician, maybe what you called has not a good understanding of the causes of the operation, I did not overlook something.

      To answer
  • Novel

    Hello! I connected a chandelier (8 lamps and all diode ones) to a two-gang switch. One key turns on the chandelier, the second cuts down the machine in the apartment up to the introductory one. Tell me what's wrong?

    To answer
    • Admin

      I think that a short circuit. Somewhere the wires are incorrectly bundled.

      To answer
  • Vladimir

    Hello. I am ElecroExpert. I constantly encounter problems with knocking out machines, and I always eliminate all the reasons. This situation: The simplest single-phase shield: Introductory EKF 32A - counter - two single-phase IEK of 16A per phase and zero at the output. Knocks OUT with a frequency of 20 minutes to 4 hours, especially in the evening. Voltage floats up to 180V. All consumers are disconnected from outlets except for two refrigerators that always start without problems and the machine does not depend on their launch. He rang the wiring with a multimeter, the resistance is more than 200mOhm. Created a short circuit - single machines are knocked out, but the input is not (that's right!). Loaded more than 16A, single ones also work with a slight delay, but the introductory one does not (also correct!). After testing, I dismantled a practically new counter (sinned on it), the introductory one works the same way. I replaced the opening machine with ABB 32A, it did not help, then Schneider 40A, the same thing. I replaced the single ones with the Schneider 16A and vseravno knocks out the INPUT after 20-35 minutes. Question? Why does only the introductory knock out, and after it the singles do not knock out.All atoms are connected 6mm2 further up to the switchgear. 4mm boxes. If at some moment a pulsed short-circuit occurs or an overload is triggered, single 16A ones (as during testing), and everything happens for a turn. Maybe I didn’t take into account something? Thanks for the answer.

    To answer
  • Alexander

    Good evening. Knocks the machine when the switch is turned off

    To answer
  • Semen

    Hello. The brainless brother gathered the shield and the counters wrong. He made the wire (both phase and zero) from the meter short and connected TO the LOW of the circuit breaker. The meter is sealed and it will not work to replace the short wire. The question is: can the circuit breaker be installed “upside down” and will it work as it should ??

    To answer
    • Admin

      Good day! No need to rearrange it. It is customary to power the AB to the fixed contacts according to the PUE, but this does not affect the performance of the AB itself. So you can leave the supply wire at the lower terminals (most importantly, do not get under voltage yourself).

      To answer
  • Andrew

    Hello! I have a problem, a machine with electric heating cuts down, despite the fact that last year it worked constantly and there were no problems. Now, a week ago, somewhere, it knocks out constantly, although it can work for several days and nothing, and maybe half an hour and is cut down. I constantly turn on, I can’t warm the apartment properly! Please tell me, what may be the options?

    To answer
  • Alexander

    Good evening. Jammed the machine and does not want to turn on. What could be the reason?

    To answer
    • Admin

      How to understand stuck in what position is it? Maybe due to short circuit does not turn on? Try to disconnect all the load from it and cock the lever, if it does not cock, the reason is the failure of the machine, if the lever cocks, the reason is the wiring.

      To answer
  • Sergei

    There is a separate cable from the shield to the washer. Power 2400 automatic machine Legrand 10A class C cable NYM 1.5X3 automatic machine buzzes when heating the water, replacing the machine did not help, even put 16A. What could be the reason?

    To answer
    • Peter

      Check the connections at the outlet and the machine. The 10A machine is weak for 2.4 kW, set a minimum of 16A. In principle, the fact that it is buzzing is not really bad, but when it starts to crack, this is the first sign of failure.

      To answer
  • Kristina

    Good afternoon! There was a problem, everything worked fine yesterday, but came home tonight, the lights in the two rooms and the sockets did not work, the lever was turned off, turned on, everything appeared and worked, after 4 hours the same thing again, and when I try to turn on the lever, click and how a white spark and lever goes down, and before there were no such problems and a hint of them, everything worked in the morning, tell me what could be and what should be done with it?

    To answer
  • Alexandra

    Hello! Tell me, if the house is a new multi-unit building, the wiring is new, the machines are installed separately for all electrical appliances, especially those that consume a lot of electricity, and after two and a half years of living in the house at the same time in several apartments, the problem is that a machine automatically cuts down on different floors in the apartments with the appliances turned off . That is, can there be a problem in the house network, and not inside the apartment? Thank.

    To answer
  • Vitaliy

    Good day, there was a problem, in the garage, an automatic machine 20a, shorted the wire, but the automatic machine knocked out a common one at 40a, how is this possible?

    To answer
  • Alexander

    Good afternoon! They lived in the new house for 2.5 years without knowing the problems. For a month now, a 16A automatic machine has been knocked out, from which the wiring goes to electrical appliances in the kitchen. Of electrical appliances, only a gas boiler, microwave and refrigerator. Otherwise, everything around the house is working properly. What is the reason????

    To answer
  • Anton

    Good afternoon! I connect the LED backlight in the kitchen. If I take the phase and zero from the outlet on the apron, everything works fine, but if I take zero from the outlet, and the phase from the switch, the machine goes to the sockets.Tell me, what could be the reason? Thank you in advance!

    To answer
  • Venus

    Good morning, tell me, can an automaton be knocked out from a power surge? I don’t understand electricity at all .. two nights in a row it knocks an automaton. Why don’t I know.

    To answer
  • Pavel

    Good afternoon! I have a 6 kW electric boiler installed in my private house (it is written on it), but it gives out only 4.5 kW (measured), the boiler worked for about a month and yesterday at 6 am I saw that the machine had been knocked out and the cable that was included in the machine had a little burned out , I pulled the clamp on the machine and turned the boiler on at 8 pm at full power, the machine was knocked out again at 3 a.m., the new Tenko KE boiler, connected directly from the support through the shield with the machine to the boiler, the cable is new, the certified organization connected, there is grounding, before and now the boiler is on flips on and off, but after 6-7 hours the machine is knocked out. Tell me what it can be, thanks for the answer

    To answer
  • Pavel

    Yes, I forgot to write that the machine is at 32A

    To answer
  • Vitaliy

    Good evening, help here with such a problem, a private house of 2 floors, on the first floor household appliances turn on by themselves: a kettle, a microwave, a washing machine on the second everything is fine, tell me what is the reason? How to fix it?

    To answer
  • Pavel.

    What's the question. The house is multi-storey. Modern. Email slabs.
    The wiring in the wall is laid.
    But 10 years have used email. tiled desktop. And there were no problems.
    Now I bought a large outdoor email. stove.
    Connected as expected to a large outlet. Through a thick wire.
    I turned on the oven for testing. It works, but the fuse is knocked out after 3-4 minutes
    He waited and turned it on again. The same story.
    What's the matter? Moreover, it is not a 32A power fuse that knocks out.
    And the whole apartment in general.
    What could it be? Where to look for a problem?

    To answer
  • Alexei

    Help!!!! A new apartment, they just connected the meter, in the apartment there are 2 bulbs and that's it, it takes about 20 minutes and a clap is heard, then the machine is knocked out. what is the reason?

    To answer
  • Dan

    A harmful article must be deleted or at least corrected !!! At the very beginning, it is recommended to change the machine to 25A when wiring 2.5 mm square. Automatic 25A will protect the cable 4 mm square. and thicker! On the outlet groups (3.5 kW, 16A) laid cable 2.5 mm square. and difavtomat 16A (-) or machine 16A paired with RCD 25A (+). It does not matter how many outlets there are in the group, at least 100. And in no other way !!! Minus and plus mean less or more. The cable may be thicker, but the machine is still no more than 16A. And to connect household outlets with a cable thicker than 2.5 mm is almost impossible (and there is no need!)
    According to PES 7: automatic 6A - cable 0.75 ... 1mm, 10A - 1.5mm, 13 ... 16A - 2.5mm, 20 ... 25A - 4mm, 32A - 6mm, 40A - 10mm, 50A - 16mm.
    All with the upcoming 2019! I wish everyone to never experience such a disaster as a fire from the wiring!

    To answer
  • Alexandra

    Good afternoon! What to do ... The lights go out completely in the whole apartment. In this electric stove - it works! And the light goes out not on the riser, but only in our apartment.

    This has already happened once. Today it repeated. Only then if it went out once. Today 3 times! At the same time, the light turns on after a while.

    Dumb in the apartment, what to do?

    To answer
    • Admin

      Hello! How is wiring protection organized, in other words, what and where do the machines stand? At the entrance or in the apartment? On the stove separately, but on the apartment separately? The only true assumption is that if only your apartment is turned off, then maybe one of the neighbors turns it off? If the machine was knocked out, neither in 10, nor in 15 minutes the light would appear, and only appear when you turn it on.

      Also, maybe you heard the sounds of sparking, the smell of burning, or similar manifestations of poor wiring? I have a dubious assumption that somewhere the contacts of the input cable have deteriorated, it heats up under load - disappears, cools down - appears, but this is very doubtful. Rather, the machine could fail, and not ensure normal functioning!

      But again, addiction needs to be traced. When it started? Maybe you got wet (snow-rain)? Then it is even more obvious that the reason is this. It all comes down to inspecting and revising the input cable!

      To answer
  • Stanislav

    Good afternoon, tell me please, did the repair in the bathroom with the replacement of the wiring, brought out the new wiring to the common panel, we also separately made a box with automatic meters in the corridor (to the bathroom), for 1.5 months we had no problems, and now the second day it is in the bathroom, although nothing is turned on, just by turning on the light in the bathroom. I understand this is related to KZ? I would not want to break the repair to figure out what the problem is (all wires hidden in the wall and so on,)

    To answer
    • Admin

      Hello! To begin with, with a minimum of losses, you can unscrew the bulbs and check whether they stop knocking out, then you can easily remove the lamp or lamps, if there are several, to see if there are any obvious problems such as bare wires and other things. Tell me, is it very wet / damp in your bathroom? If you do not find anything, then look at the presence of water and condensation in outlets and switches. Maybe it’s just flooded with something, or there were a lot of people during the bath.

      If you are lucky, it may be that the problem is so commonplace ...

      To answer
  • Alexander

    Hello! Why can an automatic machine melt? For the second time, we change an automatic machine connected to one of the lines, the second automatic machine is whole

    To answer
  • Admin

    Either fakes or cheap China you buy, or bad contact from you (wire is oxidized, terminal block is not crimped)

    To answer
  • ivan

    machine 25A knocks out after a different period of time, no load, all email. appliances are turned off from outlets, the light is also turned off. can work after 1 hour, or maybe after 1 min. replacing the machine did not produce results.

    To answer
  • Irina

    Hello. Tell me, please, why, after repair (5 years ago), brown marks from the wiring began to appear on the walls?

    To answer
  • Arthur

    Good afternoon, the introductory machine 25A is periodically knocked out. I looked at it in the flap, it turns off with a light touch, is this normal?

    To answer
    • Admin

      the machine should turn on as a toggle switch. That is, with a little effort, it goes to the middle, and then, as it were, clicks and becomes turned on. It turns out to be fixed in extreme positions.

      To answer
  • Pavel

    Good evening! The machine feeds the time relay. The relay simultaneously includes 4 lighting groups. For 3 years everything worked (network overload is excluded!), Now the machine cuts down! By the method of exclusion I found 1 group because of which the disconnection occurs! Without it, everything works (AB failure is ruled out!)! And the short circuit multimeter does not show !!!
    In the group of 5 street LED spotlights! Question: Can a spotlight break so as to knock out an automatic machine, but not shorten it? Or have I not yet taken into account something? Thanks in advance!

    To answer
  • Sergei

    Good afternoon. Such a problem. Instantaneous water heater is working properly. After it is turned off, the 16A machine switches itself off after about 5 minutes. This happens systematically. What is the problem?

    To answer
  • Michael

    Good afternoon, in the kitchen the electric stove is connected through the machine and when you turn it on. Even with the stove disconnected, it knocks the plugs. Where is the reason?

    To answer
  • Novel

    Good afternoon. A problem of this nature, the machine in the entrance guard is cut down only at night (during the day everything works fine), but every night. Only a refrigerator, a router and a TV (in standby mode) are powered at this time. It started a couple of weeks ago.

    To answer

Add a comment