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Ccx295

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hi all,

Recently I have moved into a house which has a fairly old fuse box (no RCD) which I have planned on upgrading sometime next year.

The other night in our living room when turning on the main light (dimmer switch) there was a noticeable bang (crack) and maybe a small flash of light from the switch itself which caused a bulb to blow. This also caused the rest of the lights connected to the same switch to stop working until I removed the faulty bulb...

Now I didn't think too much of this at the time until the next day when I went to turn off the same lights and couldn't. The switch was also warm to touch and it was making sizzling noises.
So I switched off the power to the house and removed the switch.
The backing of the switch had partially melted which had left plastic residue covering parts of wiring covers.

Since this I have bought a new standard switch (not a dimmer switch), cleaned up the wire covers the best I could to remove the melted plastic and fitted the new switch and now everything seems to be working as it should apart from I can still smell the "burning" smell from new switch if I sniff it closely.
My other half just thinks it is the smell from before when the old switch was burning and it is just lingering and so do I, but i just want to make sure this is normal?

It is also not hot to touch.

Should I fast track a RCD upgrade after this? Would it have tripped when facing these issues?

Thanks for any advice in advance

Mac
 
Yes it does look quite shallow.

I think I'll get someone round to quote us for a new RCD box and and maybe they will have a look at this whilst they are here
is it concrete walls that have been raggled? cant tell whats behind the box from picture, if so making the box deeper is not much of an issue, if it was my house id have those damaged cables stripped back to healthy copper and re-connect
 
And the best way to do that would be to refit 4" higher up the wall with a deeper box. then the cables would be long enough to strip back.
 

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