Why do the lights keep flashing when they are turned off?

There are two reasons why the lights in your home keep flashing after they are turned off:

1. The zero live wire is reversed, the voltage is unstable, and the power supply is poorly contacted.

It is not normal for the zero live wire to be connected to the reverse live wire from the distribution box under normal circumstances.

After the zero fire wire is removed, the fire zero wire must be led to the lighting junction box.

The fire wire leads to the lead-out junction box, which means that the switch should control the ignition of the live wire. If the connection is reversed, the switch controls the connection and disconnection, which will result in a voltage at both ends of the lamp, so that the wires will generate a weak current with the earth, which will cause more fluorescent lamps.

Solution: The direction of the zero line of fire must be changed in time. Reverse connection of the zero live wire will not only cause flashing lights, but also cause harm to maintenance personnel during the repair process of the fixture.

Second, voltage instability.

Generally, it is because some people use high-power appliances, which can be solved as long as the use of high-power household appliances is reduced. Switch with indicator When the switch is closed, the indicator light on the switch remains on. This part of the current, through the accumulation of capacitors in the light starter, will cause the light to flicker.

Solution: Remove or replace the indicator light in the switch. The line is not fast enough If a flexible wire is used in the renovation, it may produce burrs if the two terminals.

The grooves are in contact with each other, the switch will be shortened, and the contact area will be small and sparks will be generated; Secondly, whether it is a soft wire or a hard wire, the connection of the nails should be considered, if the screws are loose, it is likely to cause the two nails to come into contact, thus triggering the light. Solution: Re-check to reduce the risk.

First, the zero line of fire is reversed.

Normally, a weak current is generated from the ground, which causes flickering in the case of more sensitive fluorescent lamps and LED lamps.

Solution: The direction of the neutral live wire must be changed in time to let the switch control the line. The reverse connection of the zero live wire will not only cause the lights to flicker, but also cause injuries to the maintenance personnel during the maintenance of the lamps.

2. Induced current.

If these wires are close to the light line, or the wires carry high-power electrical appliances, such as water heaters, etc. An induced current is generated that causes the lamp to flicker. The impact of this is greater for LED lights, which are more sensitive.

Solution: A contactor coil can be connected in series at the lamp location to eliminate the weak current in the line.

Third, the quality of LED lamps and lanterns is not up to standard, and common problems are substrate leakage.

Solution: If this problem occurs, you can only change the lamp and buy the lamp with guaranteed quality.

Fourth, the zero line is electrified, and there are not many cases where the family line is electrified. If it is a single-phase electricity separated from three-phase electricity, occasionally there is a situation where the neutral line is electrified, such as the three-phase voltage is unbalanced, the line is too long, the current is too large, etc., which will cause the neutral line to be electrified.

Solution: Install LED anti-shimmer protector, even if there are all kinds of reasons, it can solve the phenomenon of faint brightness after power off.

Fifth, there is an indicator light inside the electronic switch, and there are indicator lights when it is turned on and off, so there is still a weak current in the switch after the light is turned off, which will also cause the LED light to be slightly bright.

Solution: Replace it with a normal switch.

Additional note: When wiring the light switch, safety is very important, so first of all, we must be power-off when wiring. It should be noted that the installation of lamps and switch panels must be carried out after the work of painting or pasting wallpaper on the wall is completed, and then the installation of lamps and switch socket panels is carried out.

It is important to tidy up and clean the wires so that they don't mess up. Be sure to figure it out first, don't operate blindly, safety is the most important thing.

No matter what kind of adjustments you want, you can't let others underestimate you. For example, some electric lights are more power-consuming, so when buying lights, don't look at the appearance, but also see if the home can be suitable for such lights. Most people will consider what to do if they can't pay the electricity bill, which is a very redundant problem, as long as you install it well, in fact, it is okay.

It may be because the zero live wire of the distribution box is reversed, resulting in a weak current with the earth, causing the lamp to flicker, or it may be because of the problem of the indicator light on the switch, resulting in the accumulation of the trapped current through the capacitance in the light starter, causing the lamp to flicker, or it may be because the wire is relatively dense, resulting in the induced current and causing the lamp to flicker.

It may be because there is a problem with the circuit, there is leakage, voltage instability, poor contact, or the lamp is malfunctioning, you can try a new lamp.

It may be caused by a malfunctioning bulb or a poor contact, so you can ask someone else to overhaul it.

There is a big difference between these two power supply methods, isolated power supply: the primary and secondary are isolated by transformer, that is to say, the primary negative stage and the secondary negative electrode are completely separated, and they do not interfere with each other in the circuit. It is recommended to ask when purchasing whether the power supply is isolated or non-isolated.

Some time ago, I happened to encounter this situation, that day a buddy of mine called me ** and said that the LED lights in his house are still slightly bright after turning off the switch, sometimes they flash and flash, similar to the situation you described, seriously affecting sleep, I went to his house in less than five minutes after it was solved, buddy said that you can sleep with confidence.

Because the LED light source has high dream interpretation and good luminous efficiency, it is also used in our homes a lot. However, the LED light source has a significant feature, that is, it is prone to the phenomenon of poor flicker. The home miscellaneous altar takes the following question as an example to answer the problem of LED strobe phenomenon.

The reasons for the common flashing of LEDs are as follows: a zero line enters the switch, the second is that there is an induction in the circuit, and the third is the use of a common zero line.

Let's analyze these three reasons and formulate corresponding solutions. The method of handling is also relatively simple. Find the air switch that controls this circuit, and switch the neutral wire and the live wire.

The premise is to ensure that the control line of each lamp is zero. If the control is chaotic, there will be a situation where one is not lit and the other is bright. Any one of these switches can turn off the turned on light, and you can also turn on the turned off light, so if you encounter this situation, it is because you only need to connect both switches to the live wire (phase wire), change the state, that is, let them all turn on the neutral line The problem is solved.

This problem is very simple, your LED light switch is connected to the zero wire, not the live wire, you just need to replace the zero wire entering the switch with the live wire, that is, the zero wire and the live wire can be swapped with each other.

The best way to solve the problem is to reinstall this circuit, and it must be a short circuit before it flashes.

Personally, I think that the reason why the lights at home are always flashing is probably due to poor contact, and it is necessary to check the wiring at this time.

It's because there's a problem with the bulb, so it's going to flash it, unscrew it, see if the problem is there, and then replace it with a new one.

It shows that the circuit of this bulb is relatively empty. You can tighten it a little tighter. This way, you can avoid flashing and flashing.

What should I do if the lights are off and keep flashing?

What should I do if the lights are off and keep flashing? Few electricians teach you, but the solution is simple.

If the zero wire is reversed, the voltage of the lamp will always be there. It could also be that the switch has an indicator light. Places with a dense concentration of electrical appliances may induce currents.

This is because the circuit problem inside is not installed properly, and there may be leakage elsewhere, so it will keep flashing.

The lights at home keep flashing after being turned off, indicating that either the circuit is not installed, or it has aged for a long time, or he has short-circuited. It is advisable to change the bulb.

It could be that the power supply is not good, so it is a flash, or that the contact is not good, so it is like this.

There are two reasons why the lights at home keep flashing after they are turned off, one is that the zero live wire is reversed, and the other is that the switch has an indicator light.

Maybe after the power was turned off, there was still some electricity left in the lamp, so the light kept flashing and flashing.

The circuit is too old, or it is short-circuited, normally, it should not flash, or it may be used for too long, and the resistors need to be replaced.

Because the power supply is not turned off, it will leave a certain amount of electricity in the lamp, so it will keep flashing.

First, switch the control of the neutral line, turn off the power, and the line is still powered. Second, the current LED lights and ballast switches, after disconnecting the power supply, have a registered charge inside.

Third, the insulation of the line is aging, and after the power is off, a part of the induction electricity enters the lamp along the neutral line, causing the bulb to flashover.

With a brake knife, try disconnecting both wires.

The switch is connected to the zero line, just pour the thread.

It also doesn't work after the live and neutral wires are swapped.

Hello:——1, this fault is rare: only according to the "energy-saving lamp replaced by a bulb, it will flash after turning off" fault phenomenon analysis, the fault and "live wire and neutral line interchange", "switch with indicator light" is not related, the root cause, is likely to be connected to the switch between the two wires appeared "leakage", "creepage" phenomenon caused.

2. The inspection method is: disconnect the main switch, remove the lamp (bulb or energy-saving lamp), and use the 500V shake meter for detection to draw conclusions. Replace the two wires connecting the light switches and it will be back to normal.

In this case, the lights can only be changed.

I don't know if you have observed the electric light, many families will still flash after the electric light is turned off, which is an abnormal phenomenon, and it can also reflect that there is a certain problem with the power supply at home, so I will introduce it to you.

First of all, we must know that under normal circumstances, once the power is turned off, then the light will not be on, and it will not flash, if this situation occurs at home, it means that there is a certain problem with the line, you must know that the neutral line is connected to the lamp junction box, and the live wire is connected to the switch junction box, so that the switch can better control the lamp, if the zero wire is connected to the switch junction box, and the live wire is connected to the lamp junction box, the line is reversed, then the switch will be disconnected from the zero line, This leads to the occurrence of this phenomenon. Secondly, you must know that many young friends will pay too much attention to the beauty of the switch when buying a switch, you must know that a beautiful switch can not bring us any convenience, and at the same time may lead to certain problems in our lives, so when buying a switch, we must choose a good practicality, and we must also investigate several switch stores to be able to make a choice.

In addition, if there is such a situation, we should not act rashly, but call ** to let a special electrician master to check, so that we can not only ensure our safety, but also be able to see what the reason for this situation is, so that the electrician will repair according to this reason, and there will be no more such a situation after the repair.

Finally, I want to say that there may be other things in the process of decoration, at this time we need to accept, if the acceptance is not passed, then the house will have all kinds of problems in the process of use, which will bring us a lot of expenses, which is very cost-effective, and will also lead to our mood deteriorate, so we must be careful in the process of acceptance.

This phenomenon may occur because of the failure of the home circuit, the voltage is unstable due to the relatively large power ratio of the surrounding people's homes, the power supply is poor due to the aging of the line, or the service life of the lamp is expired, or the chandelier is broken, and it is also possible that the neutral wire and the live wire are reversed.

Of course, this is not an abnormal phenomenon, which indicates that the circuit is not in good contact, so the lights will flash again and again after being turned off, so be sure to rearrange the circuit.

It is particularly abnormal, and it should be repaired immediately at this time, as all possible flashing bulbs occur. They can also break the lights in their own homes.