Newly fitted light switches trip the breaker. (Ed.)

[RandomGrinch]

View attachment 323067

Yes, but in this case, for better or worse, I'm guessing that it is a neutral.
With an L, N & E coming from the lamp flex, out of the wall, and an L, N & E twin and earth in the back box?...

@Marky.M can we see a proper photo of your wiring and connections?

 

[jurassic sparkk]

This is a pic of the wiring. I’ve just capped them off for now. The cable will obviously be cut shorter eventually.

Grab a meter, and check from that (blue) wire to the brown wire... and report back here what you get. Then from the earth to the (brown) wire.

 

[SUNRAY]

It would be good to answer the early question of how did you wire the light?

Are there 2 cables?
Did you connect both browns together into the fitting?
Did you connect both blues together into the fitting?

 

[securespark]

Yes, this is common where a fitting that has feed(s) and switch wires present at the fitting and has been wired with the reds/browns connected to each other and the blacks/blues connected to each other. This causes the fitting to illuminate permanently with the switch off and trip the circuit protective device when switch is turned on.

 

[Marky.M]

Hi Adam, in terms of the connection to the fitting. There are two brown wires in one hole, two blue in another and two earths in the third hole. They are doubled up as the lamp also connects to another identical lamp further along the wall

 

[Marky.M]

It would be good to answer the early question of how did you wire the light?

Are there 2 cables?
Did you connect both browns together into the fitting?
Did you connect both blues together into the fitting?

Yes that sounds right in terms of how I wired the light fitting.

 

[securespark]

Until you post a picture of the connections behind the wall lights, we will not be able to advise any further.

 

[bernardgreen]

 

[Marky.M]

Yes that sounds right in terms of how I wired the light fitting.

Just uploaded a pic of wiring in the lamp

 

[Marky.M]

So here’s the wiring inside the light fitting. Left - blue x2 middle earth x2 right - brown x2.

 

[JohnD]

Can you afford to buy a multimeter?

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[EFLImpudence]

You say the second cable goes to the other light; Is that correct?

Both - correct that that is what you said and correct that it actually does.

 

[EFLImpudence]

Hi Adam, in terms of the connection to the fitting. There are two brown wires in one hole, two blue in another and two earths in the third hole. They are doubled up as the lamp also connects to another identical lamp further along the wall

Hi, I have two wall lights in a bedroom. I am currently fitting the switches. There are to be two switches one under each light. When I began to fit the first switch, I connected the wires to the switch unit and the lights came on. But when I go to switch off the light switch it trips the fuse in the consumer unit. Any ideas why this happens? Could it be because the second switch isn’t connected yet? Thanks .

What do you want the second switch to do?

 

[Harry Bloomfield]

So here’s the wiring inside the light fitting. Left - blue x2 middle earth x2 right - brown x2.

Are there perhaps two associated switches, which you are fitting, or replacing? Is this what is called a two-way switched system? Two switches, either of which can turn on or off, one or more lights?

 

[SUNRAY]

What do you want the second switch to do?

EH?

Hi, I have two wall lights in a bedroom. I am currently fitting the switches. There are to be two switches one under each light.

You know perfectly well that he is talking about one switch operating each light.