Hi forum. Hope you are all well and enjoying the lovely weather and not working too hard. :)
I have a customer who's new kitchen/extension I wired in September. Since then they have been having one of the three lighting circuits in the kitchen flicker.
Allow me to describe:
House is on TT but in a suburban setting. Which is weird, but there you go. Zs is 2 ohms. I presume because of water pipes.
Anyway. One new circuit from CU on a 6A RCBO runs the new kitchen and outside lights. 3 gang dimmer switch runs: circuit #1 6 downlights, circuit #2 two pendants and a cupboard luminair (on a dimmable xformer), and circuit #3 another 6 downlights. The pendants are on a 2-way circuit controlled from a switch at the entrance way. There is additionally a pair of up-down lighters on a switch and a PIR flood on a switch.
Semi-randomly, and ONLY on the pendant circuit, the pendant lights flicker. As in, change brightness. Looks like interference from a car charger (though there is not one on the property). It's NOT 'I turned the LED down low and the triac is struggling' sort of flicker. It's only on the pendant lights. Pendants measure out 0.5 ohm r1 and 0.35 ohm rn bulb holder to CU.
I tried a Varilight Pro dimmer, and a Knighstbridge dimmer, both trailing edge types. I tried 2 different brands of bulbs.
I have bypassed the dimmer and that solves the problem - though of course they have now a non-dimmable light.
Before I give up and fit a push-switch where the middle dimmer used to be, anyone got any ideas?
Many thanks.
