This is already the 10th (anniversary) part of a series of publications - "question-answer on electrical". Who missed the previous parts - I, as always, remind you that in this and past publications (parts) I bring real questions from readers and my answers to them. I continue to do so in this part.
The only thing is that from this 10th part I begin to publish not a few questions and answers to them (as it was before), but only 1 question and an answer to it. I think this should be better - since it allows you to write the whole question in the heading, and this in turn means that in It will be easier for readers to make a decision on the Zen feed - whether to read the publication or not, depending on whether they are interested in this topic or no.
The question Nikolai asked was as follows:
At the entrance to the room, turn on the lighting switch, from which the LED chandelier turns on. After turning off the chandelier with the control panel, it turns off, but the residual glow remains. How to beat this?
I gave the following answer:
Yes, despite being effective, LED bulbs often suffer from a faint glow after being turned off. As a rule, among the most probable reasons for this phenomenon are:
- The presence of a backlight on the switch - in the case of an LED or lamp indicating the location of the switch in the dark, they bypass the contact circuit. For classic incandescent lamps, this backlight does not create lighting effects. But for LED models, the shunt circuit provides sufficient electrical signal to allow the bulb to dim. To eliminate, you need a switch without a backlight or in an existing one you can cut the power wire.
- Low quality LED lamp - when using cheap models, manufacturers often save on current stabilizers. This can lead to a number of problems in the future, including weak flickering or glow when the switch is off. This is especially true in situations where the switch breaks the neutral conductor instead of the phase conductor. To eliminate it, you need to replace the lamp with a better model or connect the phase conductor to the switch button.
- Faulty wiring. As a result, there is a weak glow of the lamps from the influence of small currents. In the nominal operating mode, the defect does not appear, but in the off state it is expressed in a weak glow or flickering of LED lamps. In some situations, it is extremely problematic to diagnose the place of damage to the insulation of electrical wiring, but the elimination of this malfunction requires the elimination of the point of weakening of the insulation.
P.S. Link to some past parts - Part 9, Part 8, Part 7,Part 6, Part 5.