Light switch wiring query

[nae_mair]

You need this checked by a spark, as as it won’t take long, get them to check a few more.

How old is the property and / or have you had building work done or a rewrite ?

Property quite old and is an ex council house.

 

[telectrix]

well spotted there. but..... has the switch been wired like that after the meter fitting monkey has reversed the polarity at the meter?????????

 

[Pete999]

If those are lives looped in the connector, it looks like you're switching neutrals. Get someone qualified to make sure.

Good spot Mate, was wondering what those 2 reds are doing in the connector block, so you are more than likely correct in your assumption.

 

[telectrix]

Just wondering if I should get a professional in to wire up new switch

think it's a good idea, and maybe an inspection of the installation is in order if as has been said, the polarity is incorrect, there could be a few more nasties lurking.

 

[ipf]

well spotted there. but..... has the switch been wired like that after the meter fitting monkey has reversed the polarity at the meter?????????

..a bit of good thinking, there........after all...
Two negatives = positive.
They may think n x n = live.

 

[JAWS]

Thank you.
I suggest you think about it, too......after reading the thread.

Is it the term they use for borrowed neutrals

 

[westward10]

Is it the term they use for borrowed neutrals

Borrowed neutrals is something different. This was common practice in the 70s to take the line supply from one level with the neutrals from another for two way lighting.

 

[Yozza19]

I think the black in the coman is joined to the 2 reds in conecter as it would of been tight getting 3 cables in the comman although you could of put a red each side and linked and he dint have any red cable left

 

[westward10]

I think the black in the coman is joined to the 2 reds in conecter as it would of been tight getting 3 cables in the comman although you could of put a red each side and linked and he dint have any red cable left

Yes this is possible but I think we need to side with caution in this instance.

 

[ipf]

I think the black in the coman is joined to the 2 reds in conecter as it would of been tight getting 3 cables in the comman although you could of put a red each side and linked and he dint have any red cable left

Bad thinking is that. What's with the two reds in the connector?......look closer, there are three.
Three t+e's, all accounted for.

 

[JAWS]

Borrowed neutrals is something different. This was common practice in the 70s to take the line supply from one level with the neutrals from another for two way lighting.

Thanks

 

[ipf]

Is it the term they use for borrowed neutrals

As well as the two way concern, in a case of properties, many borrowed neutrals occurred when the original CU had only one lighting circuit. A new mcb CU and the circuit being split into two, upstairs and down, resulting in a common neutral. Just bad practice.