Has anyone else experienced this with dimmer switches/lighting?
I have just visited a house with problems with lighting in the dining room.
Symptoms.
The centre light in the dining room flickers/dims when the dimmer in the lounge is adjusted.
This sounded like someone had mixed up the switch wire and feed so I was expecting a simple fix but..
The supply comes from the dining room then on to the living room, when checking the voltage at the input to the dining room switch it was 241.7v and did not change when the dimmer in the lounge was adjusted BUT the output from the dining room switch changed from 160v to 177v dimming the lamps in the dining room when the lounge dimmer was adjusted!
I have checked the load on the lounge dimmer switch with my Megger clip on ammeter and used the 50/60Hz switch to check harmonics, it is clear there are a lot of harmonics on this output. Around 200mA at 50Hz and 370mA without the 50Hz filter. I have come to the conclusion that the harmonics are affecting the dining room dimmer, it is the first time I have had this issue, the dimmer switch at the far end of a circuit affecting the output (but not input) of a dimmer switch up stream of it! Clearly my Fluke volt meter is less affected by harmonics.
