Sto cercando di sostituire un lampadario a parete ma ha solo il filo verde e grigio. L’apparecchio che ho acquistato ha una connessione per 3 fili ma non sono sicuro di quale vada dove. Capisco che il filo verde e giallo sia una terra ma poiché non c’è un terzo filo, suppongo che la terra non sia necessaria? Sai dove collegare i fili?
https://www.reddit.com/gallery/1p3vxxu
di Naxts
7 commenti
Ground is optional (usually for high volt stuff).
Matching isn’t necessary, if switch is off, loop doesn’t happen regardless
Connect solid color to solid, will work
Does the old lamp cover have markings (L or N)?
I would believe green is N and grey L but who knows who wired the lamp.
grey should be live wire, it’s old code, nowadays black/brown. the green is weird, since green has never been a colour used in finland for either zero or live wire.
If you want to know for sure, use a multimeter, but just connectiong grey to brown and green to blue will work, but then always be careful when swapping broken lamps.
Of course the ground wire should be left disconnected in this case.
The other two shouldn’t matter in this case, as you can connect a light bulb either way.
If you want to make it perfect, use a current tester screw driver to see which of the wires is “hot” and make sure it is connected to the tip of the light bulb – but that was really more of a safety feature coming from the time when light bulbs were regularly changed and one couldn’t trust the user to switch off electricity before doing so. With modern LED lights (and hopefully someone who knows where to find the circuit breaker), this really isn’t an issue any more.
Grey goes to N.
It doesn’t matter which color goes to what. It’s just a simple loop that disconnects anyway when you turning the switch off. That’s for sure. But I get your point, matching the colors is what you’d need to do. And it’s really so annoying when you find mismatching colors or just two black wires.
I always use ‘jännitekynä’ (they are less than 3€) to check there really is no electricity when touching wires (a long time ago I did not and got zapped in an old apartment while the main power was off, don’t ask me how it’s possible, but a couple of scenarios come to mind), but it can also be used to chech which one is the live wire. With a lamp does not really matter, but jännitekynä is a small investment.
How to use:
https://youtu.be/liQnN8wM_Us