Adding a light in the loft

[Conmeister]

Hello all

Apologies if this is a basic query but i've been left somewhat confused. I'm trying to add a light into the loft and i've attempted to loop in from the upstairs landing ceiling rose. This ceiling rose only has one live and one neutral in it (as well as light flexible brown and blue). I thought there should be 2 lives and 2 neutrals there for the circuit and the switch. Is this something to do with it having a downstairs switch? I connected the new cable to the live and neutral and run it up into the loft and connected to the new ceiling rose. When i turned the power back and operated the switches, the CB went.

I tried an alternative approach by connecting to an existing junction box in the loft which operated bathroom lights. I took my feed from there. This seemed to work but bizarrely, the CB went when i turned the light OFF! What am i doing wrong?

Any suggestions would be greatly appreciated

Thanks for your time
Conor

 

[spark1]

Conor. Some photos of your connection will be required in order to help.
The landing light Switch wire & neutral would have been acceptable providing you were happy to only be able to operate the loft light when the landing light is on.you dont make any mention of a switch for the loft light.include this in your photos or sketches if one is installed....more info required.!

 

[Conmeister]

Hi Spark1. Thanks alot for your reply.

Unfortunately i cannot upload pictures which i appreciate is not very helpful. When i've connected to the junction box (which supplies bathroom lights), i have taken Twin and earth to a ceiling rose then another twin and earth to a switch. This seems to be work (as an independent light) but when i turn the light off, the CB trips. Any ideas?

 

[Adam_151]

Have you by anychance connected the switch across the supply instead of in series with the lamp?

 

[Johnmelad502]

Have a look here

 

[spark1]

Have you by anychance connected the switch across the supply instead of in series with the lamp?

Adam . Thats were my thoughts were . Is sounds like a possibility Conor has made this sort of error

 

[Conmeister]

Haha, your suspicions are correct gents. I've been a dozy bugger!!! All sorted now. Thanks for your help. Its all good practice!

 

[spark1]

Thats good news Connor, Your poor circuit breaker can now have a more peacful life