Why do the lights flash at home? What should we do?
A lot of times, we have turned off the lights, but the lights flash for a while. What's the reason?
The reason of the lights flash
There are many reasons for the flicker of electric lights. Nowadays, LED lights are popular, but the internal resistance of LED lights is small. If the electric light is in a narrow and circuit dense environment, such as balcony, it is easy to produce induced current, causing the electric light to flash.
1. In case of flashing lights, the first thing to check is whether the zero line and the live line are connected reversely. Check whether the line color at the switch is red or not. If not, consider that the switch may control the zero line. If it is confirmed that it is connected reversely, it needs to be adjusted immediately, and the wires of the electric lamp and the switch need to be adjusted.
2. Second, observe the flashing lights. If there are multiple lights flashing in the room, and these lights belong to the same circuit, consider the reverse connection of the zero line and the live line in the distribution box. If it is confirmed that the zero line and the live line in the distribution box are connected reversely, the two lines at the lower port of the circuit breaker need to be adjusted in pairs. After the adjustment, it must be marked. The line colors of the zero line and the live line in this circuit are exchanged, so as not to affect the maintenance in the future.
In addition to the flicker of electric light, the switch control zero line may cause electric shock hazard. If this problem is found, it must be changed in time.
3. If it is confirmed that the zero line and the live line are not connected reversely, it is possible that the electric lamp generates self-induced current. If the induced electricity on the zero line is small at this time, it will accumulate on the internal capacitance of the electric light starter until there is enough electricity, and then it will be released once again - the appearance is that the electric light flashes. If the induced current on the zero line is large at this time, the current will continue to be generated on the line, making the light of the electric lamp dim. It is difficult to eliminate self-induced current. The recommended method is to consume this part of electricity. The method is to buy a 220 V AC relay, connect the relay coil with the light in series - eliminate the self-induced current by using the relay coil.