Defect Dimmer FGD211

[Maintains 0]

I've got a Fibaro FGD211 dimmer attached to my conventional incandescent of 200 Watt. Last week the device stopped responding and I inititially expected the lightbulb to be defect. However, after changing the lightbulb, nothing changed.

After opening the Toggle Switch on the wall the Dimmer FGD211 appeared to have suffered quite a bit. Anyone got any idea on how this is possible? As i'm having two more of these connected to my lights in the living room (with 400 watts each)... the idea of melting metals isn't really comforting.

Is there anything i'm missing?

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[Dalle1985 16]

Improper installation of the wires. It looks like the wires have not had proper contact with the terminals leading to excess resistance and thus heat being deposited in the terminal. Did the wires seem loose when you pulled the module out? And more importantly, was this done by a certified electrician?

[Maintains 0]

They used a 2,5mm cable straight out of the wall that fits in all the way to the end. And yes it was connected by an electrician. Don't now if they are certified, haven't seen that but given that it's a business i'm expecting so.

But looking at the way it was connected, i'm not sure how it could have been connected even more strongly...I couldn't move it in or out without unscrewing it.

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[UrSv 6]

Yeah, that sure looks like the wire has come loose.

The wire looks really strange. Is it single core and has it been broken where the big indent is close to the isolation?

[Dalle1985 16]

Hmm... The wire looks mangled... If you look closely, it seems like there is a crack in the core where it's been mangled. This can cause a lot of heat development. Single core cables are both a blessing and a curse. This is one of their less desirable properties.

[hvb83 1]

Looks like a crack in the copper wire indeed. The insulation stripper used was set incorrect and cuts too deep, not very professional. Don't know if that was the cause for your problem however.

[UrSv 6]

Single core cables are both a blessing and a curse. This is one of their less desirable properties.

Yes, but if you remove the isolation without cutting into the copper it would take serious physical activity to make it look like that.