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PostPosted: Fri Sep 15, 2017 3:26 pm 
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I have a light switch in my hall upstairs and a lamp holder in my loft.
I'm trying to wire in a new light switch in the hall and a lamp holder in the hall cupboard.

The loft switch has a red wire going into the common terminal and a black wire that has been Sheafed in red going into L1 which i presume is the switch live.

I have some 1.5mm cable that has two brown wires and an earth that i found in the shed.

I have cut a piece of cable and connected one of the brown wires to the common at the loft switch and the other end to the terminal marked FEED1 on the hall switch. The other brown wire is not doing anything at present. (Not sure what to do with it)

I have cut a second piece of cable and connect one of the brown wires to the terminal marked load live 1 and the other end of th brown wire to the terminal block marked L. The other brown wire is again doing nothing.

When the hall switch is off only the FEED terminal is live. When i turn the hall switch on the load 1 live is has power but confusingly so does the other brown wire that is not conneced to anything.

What on earth is going on. I'm completely lost. Please help!


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PostPosted: Fri Sep 15, 2017 4:17 pm 
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:welcomeuhm:
I've moved this to lighting.


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PostPosted: Fri Sep 15, 2017 5:20 pm 
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Ok, sorry.


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PostPosted: Fri Sep 15, 2017 7:05 pm 
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:welcomeuhm:

Can you do a rough sketch ?from your description you seem to be missing a neutral...

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PostPosted: Fri Sep 15, 2017 7:20 pm 
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wine~o wrote:
:welcomeuhm:

Can you do a rough sketch ?from your description you seem to be missing a neutral...


I've since wired the one brown wire to FEED 2 on the hall switch and the other brown wire into the other terminal on the loft switch. It is working but for some reason if i turn the loft light on the hall switch doesn't work. Also the new hall lamp holder works fine for a 60w bulb but won't power a 100w bulb...


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PostPosted: Fri Sep 15, 2017 7:36 pm 
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Right so let us start at the beginning ... on light circuits we normally have a loop at a ceiling rose or at the switch.

the switch will normally have just a permanent and switched live. The neutral will be at the ceiling rose or at the switch.

Which do you have ?

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PostPosted: Fri Sep 15, 2017 7:46 pm 
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As wine~O says, you have no neutral, you have connected across a switch and it is back feeding which is why is "works"

Can you post pictures of the existing loft light, its switch and your new switch.

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Take it easy, a forum is only a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link. to find out more.

No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


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PostPosted: Fri Sep 15, 2017 7:49 pm 
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someone-else wrote:
As wine~O says, you have no neutral, you have connected across a switch and it is back feeding which is why is "works"

Can you post pictures of the existing loft light, its switch and your new switch.


Back feeding? That doesn't sound good...

I tried to post a picture but it keeps saying the size is too big.


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PostPosted: Fri Sep 15, 2017 7:51 pm 
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wine~o wrote:
Right so let us start at the beginning ... on light circuits we normally have a loop at a ceiling rose or at the switch.

the switch will normally have just a permanent and switched live. The neutral will be at the ceiling rose or at the switch.

Which do you have ?


I haven't checked the ceiling lamp holder in the loft but there is no neutral at the switch. There is just a red wire going to the common and a black going to L1. I think the switch is a 1gang... is that right?


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PostPosted: Fri Sep 15, 2017 7:54 pm 
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Its normal to have no neutral at the switch, regarding your pictures being too big, follow the link in my signature, it shows how to re size pictures

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Take it easy, a forum is only a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link. to find out more.

No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


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PostPosted: Fri Sep 15, 2017 8:01 pm 
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someone-else wrote:
Its normal to have no neutral at the switch, regarding your pictures being too big, follow the link in my signature, it shows how to re size pictures


I'm using an ipad.


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PostPosted: Fri Sep 15, 2017 8:23 pm 
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Can you use something like this?
http://resizeimage.net/
That's just from a Google search, there are several to choose from online.



For this message the author Dave54 has received gratitude : multiman
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