Lighting circuits and possible cross-over

[Gary Tollison]

Hello.
I have a possible issue with the lighting circuits in my house.
There are two lighting CCTs:

Dropbox - 01.JPG - https://www.dropbox.com/s/ike2aygjja64pfm/01.JPG?dl=0

1 LIGHTS supplies:
Lounge
Kitchen
Downstairs toilet

2 LIGHTS spplies:
Hall
Upstairs landing
Upstairs bedroom
Upstairs spare room
Upstairs bathroom

In the hall, there is a doble switch, one controlling the upstairs landing light, and the other controlling the hall light.

Dropbox - 02.JPG - https://www.dropbox.com/s/3cech5ldpcaj8ky/02.JPG?dl=0

here's where I'm confused, but there's nothing new there.

With 1 LIGHTS CB tripped, and 2 LIGHTS CB still on, all lighting on 1 LIGHTS can still be powered on by operating the downstairs LANDING light switch.

and...

With 2 LIGHTS CB tripped, and 1 LIGHTS CB still on, the upstairs landing light can be operated with the downstairs landing light switch.

and...

upstairs landing, bedroom, spare room and bathroom lights can be operated with the downstairs or upstairs landing light switch.

I am not convinced that this is normal, even though my wife assures me that the "electrician" who did the installation some years ago said it was all above board and legal.

Any input on the matter?

Thanks,
Gary

 

[Octopus]

When did this start happening?

 

[Pete999]

Hello.
I have a possible issue with the lighting circuits in my house.
There are two lighting CCTs:

Dropbox - 01.JPG - https://www.dropbox.com/s/ike2aygjja64pfm/01.JPG?dl=0

1 LIGHTS supplies:
Lounge
Kitchen
Downstairs toilet

2 LIGHTS spplies:
Hall
Upstairs landing
Upstairs bedroom
Upstairs spare room
Upstairs bathroom

In the hall, there is a doble switch, one controlling the upstairs landing light, and the other controlling the hall light.

Dropbox - 02.JPG - https://www.dropbox.com/s/3cech5ldpcaj8ky/02.JPG?dl=0

here's where I'm confused, but there's nothing new there.

With 1 LIGHTS CB tripped, and 2 LIGHTS CB still on, all lighting on 1 LIGHTS can still be powered on by operating the downstairs LANDING light switch.

and...

With 2 LIGHTS CB tripped, and 1 LIGHTS CB still on, the upstairs landing light can be operated with the downstairs landing light switch.

and...

upstairs landing, bedroom, spare room and bathroom lights can be operated with the downstairs or upstairs landing light switch.

I am not convinced that this is normal, even though my wife assures me that the "electrician" who did the installation some years ago said it was all above board and legal.

Any input on the matter?

Thanks,
Gary

Whereabouts in the UK are you situated?

 

[Gary Tollison]

Am in Peterborough.
I’m not sure how long it’s been like this, I only discovered it recently by chance when I changed a lightswitch like for like. And yes I got the wires in the correct holes

 

[Gary Tollison]

However, with both 1 & 2 circuits energised, they behave normally

 

[westward10]

Are you saying with either circuit breaker off, not both all lights still function.

 

[Pete999]

Am in Peterborough.
I’m not sure how long it’s been like this, I only discovered it recently by chance when I changed a lightswitch like for like. And yes I got the wires in the correct holes

Post Code?

 

[Pete999]

Post Code?

 

[Gary Tollison]

Yes.
When either CB is off, the lights they only function as mentioned above.

 

[westward10]

But the landing switches need to be in a certain switching position for this to happen?

 

[Gary Tollison]

Yes

 

[westward10]

They are interconnected then possibly at the switches.

 

[telectrix]

shared neutrals????.

 

[westward10]

shared neutrals????.

I don't think he has a tripping issue. It seems both mcbs need to be off to isolate either circuit.

 

[Gary Tollison]

There is no tripping issue, as neither CB’s have tripped at all.
It’s only when either one CB is off and the other is on.
So Westward wins the toaster
Will keep you updated...