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so if it is just because the circuit is running close to its limit, does this buzzing pose and danger?

thanks for that, that seems to make sense. what would you recommend doing about it?

yeah theyre being run by a transformer

current demand is apporx 4.6A on my calculations, it is a 6A MCB, and the terminations all seem fine

Hi, I have just installed some LV downlighters in the downstairs of my house and now when the lights are switched on the MCB makes a buzzing sound. Some of the lights are running off a dimmer, would this maybe cause trhe buzzing? or is it something more? thanks in advance