Confused! Bedroom lighting wiring.

[AndyPRK]

probably a fault in the hidden? junction box. Humm........

Why he had felt the need for a junction box I don't know!


I guess it could have been left disconnected at another ceiling rose for safety? as no light was fitted.

 

[EFLImpudence]

problem being he's away darn' sarf' for a few weeks

I haven't seen him.

 

[sparkwright]

Thought I'd mention it.

You don't want to be a complete laughing stock when the electrician turns up.

Incidently, the cable at the switch is at least ten years old, so not a complete re-wire then!

Yeah i thought as much having looked into it! I doubt he imagined i would take the switch off though...

Am i right in thinking the brown should go to the brown and the blue to the sam connector block as the blue? Is that correct?

If you're talking about the ceiling rose, yes.

The brown lampholder flex goes in the very end terminal of the block with two holes.

And the blue lampholder flex goes the very end terminal of the block at the opposite end of the rose.

 

[JohnW2]

problem being he's away darn' sarf' for a few weeks

I haven't seen him.

Maybe he's over my side of the sarf - but I haven't seen him, either

Kind Regards, John

 

[sparkwright]

I saw him this morning.

 

[JohnW2]

I guess it could have been left disconnected at another ceiling rose for safety? as no light was fitted.

Indeed - it would not exactly have been a good idea to leave a cable dangling from the ceiling which became live if the switch was 'on' - so maybe that cable currently 'goes nowhere' (electrically).

Kind Regards, John

 

[EddieM]

I guess it could have been left disconnected at another ceiling rose for safety? as no light was fitted.

Indeed - it would not exactly have been a good idea to leave a cable dangling from the ceiling which became live if the switch was 'on' - so maybe that cable currently 'goes nowhere' (electrically).

Kind Regards, John

Best case is it "goes nowhere" but far from an ideal way to leave things, maybe a disconnected live, a disconnected neutral (and earth) or a combination of all... impossible to say without a multimeter.

 

[JohnW2]

Indeed - it would not exactly have been a good idea to leave a cable dangling from the ceiling which became live if the switch was 'on' - so maybe that cable currently 'goes nowhere' (electrically).

Best case is it "goes nowhere" but far from an ideal way to leave things, maybe a disconnected live, a disconnected neutral (and earth) or a combination of all... impossible to say without a multimeter.

Agreed.

Kind Regards, John

 

[Taylortwocities]

The junction box must be there to connect up the 'old' wiring (red/red at the switch) to the new wiring (blue/brown at the light fitting).

Only half a rewire, maybe?

 

[JohnW2]

The junction box must be there to connect up the 'old' wiring (red/red at the switch) to the new wiring (blue/brown at the light fitting). Only half a rewire, maybe?

Well, yes, but the JB (or whatever) is obviously doing more than just joining old colour cable to new colour cable - it's obviously also 'bringing together' the supply feed and the cable from the switch and then sending (presumably) just a S/L and N (+CPC) to the single cable in the ceiling for the light. To end up with just that single cable for the light would obviously involve a JB (or equivalent) somewhere, regardless of the colours of cables.

Kind Regards, John

 

[sparkwright]

Either way, it's a strange way to leave a re-wire.

One would have expected a basic pendant to have been fitted, or if not possible, the cable made safe in terminal blocks taped up, and any junction boxes or other connections already done.

Why wasn't a light put up in the bedroom? Was the ceiling not plastered at the time?

Whatever the case, you have been left with an incomplete job.

 

[JohnW2]

Either way, it's a strange way to leave a re-wire. One would have expected a basic pendant to have been fitted, or if not possible, the cable made safe in terminal blocks taped up, and any junction boxes or other connections already done.

Quite so - as you say, the job is clearly incomplete. Also, as has been pointed out, if what the OP thought he he was getting a 'complete re-wire', he almost certainly hasn't (at least, yet!), given that twin red at the switch.

Kind Regards, John

 

[sparkwright]

I would say we have all left good bits of wiring in on some occasion on re-wires where it's clearly new enough, and not worth a lot of disruption.

I mean, if you go to re-wire a house, and there's a 5 year old flat roof concrete floor extension out the back, you try to salvage the actual wiring - don't you?

 

[JohnW2]

I would say we have all left good bits of wiring in on some occasion on re-wires where it's clearly new enough, and not worth a lot of disruption. I mean, if you go to re-wire a house, and there's a 5 year old flat roof concrete floor extension out the back, you try to salvage the actual wiring - don't you?

I'm sure you do - I certainly would. Provided the customer knows, and is happy, that's obviously fine.

Indeed, rewiring just for the sake of replacing cables may become largely a thing of the past. Many PVC cables in service today may well still be fine in 100 years time ... so extensive 're-wires' may come to be only usually done when a major change to the arrangement of the installation is required (or when future regs require things to be done totally differently!).

Kind Regards, John

 

[EddieM]

I would say we have all left good bits of wiring in on some occasion on re-wires where it's clearly new enough, and not worth a lot of disruption. I mean, if you go to re-wire a house, and there's a 5 year old flat roof concrete floor extension out the back, you try to salvage the actual wiring - don't you?

I'm sure you do - I certainly would. Provided the customer knows, and is happy, that's obviously fine.

Indeed, rewiring just for the sake of replacing cables may become largely a thing of the past. Many PVC cables in service today may well still be fine in 100 years time ... so extensive 're-wires' may come to be only usually done when a major change to the arrangement of the installation is required (or when future regs require things to be done totally differently!).

Kind Regards, John

Apart from the fact that cold extruded copper, slowly reverts to a brittle crystalline form over time, but that is over a considerable amount of time.