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 Post subject: Switch live question
PostPosted: Fri Mar 16, 2018 8:21 pm 
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Hello people, hope all is well. I have a quick question about a wiring set up I've come across. I just took off an old ceiling light that was circular fluorescent tube type fitting. I've found 3 wires, 2 x twin & Earth and 1x 2 core only, live and a earth.

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Here's what used to be there:

Image

I plan on fitting a ceiling rose, can I just connect the live and neutral from the ceiling rose to the existing terminal rather than wire into the new ceiling rose.
Finally, which is the switched live? Is it the live wire from the 2 core cable? There is no neutral on this cable.


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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 8:27 pm 
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Pictures will follow soon, didn't realise photobucket no longer allows free hosting


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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 8:59 pm 
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they do iff your mug enough to pay a monthly or anual subscription :lol:

any red sleeves/tape/colour marker on any wire

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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 9:10 pm 
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big-all wrote:
they do iff your mug enough to pay a monthly or anual subscription :lol:

any red sleeves/tape/colour marker on any wire


Nothing at all. The wires from the twin&earth terminate together, so the lives together and the neutrals together. The live from the two core is on its own.


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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 10:46 pm 
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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 10:53 pm 
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well the way it works :lol:
both the possitive an negative arrive at the rose
the black/neutral goes directly to the fitting
a feed off the live goes to the switch and switched live back to the fitting :lol:
are those wires as found in the connector block unaltered :dunno:

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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 10:55 pm 
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big-all wrote:
well the way it works :lol:
both the possitive an negative arrive at the rose
the black/neutral goes directly to the fitting
a feed off the live goes to the switch and switched live back to the fitting :lol:
are those wires as found in the connector block unaltered :dunno:


Yes this is how they were wired.


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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 10:58 pm 
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This is how it was wired to the fitting


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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 11:05 pm 
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where you have the two black and the two reds in a single contact in the block is the power in and power out daisy chain style you would then have a single black the other side going to the light/s controled by the switch
you then have a feed from the other red contact to the switch

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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 11:12 pm 
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Yes you can connect just a ceiling rose, but what do you do with the remainder? as its connector block you can't just poke it in the ceiling, and since you have a rose you may as well use it, and you will get a better earth connection than what you have now.

The way it is normally wired is as big-all said, but it is not so in your case, as you have 5 wires (not counting earth) but its not a problem, keep things as they are, and your single red is the switched live.

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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 11:45 pm 
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There was a live wire to what looks like the transformer and then a neutral went to a piece that connected to the circular lighting tube.

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 Post subject: Re: Switch live question
PostPosted: Fri Mar 16, 2018 11:54 pm 
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But that would be "from" the choc bloc. You would still be better off using the rose.

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

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

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

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 Post subject: Re: Switch live question
PostPosted: Sun Mar 18, 2018 10:36 pm 
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someone-else wrote:
But that would be "from" the choc bloc. You would still be better off using the rose.


Just to clarify, I wire the rose exactly like the wires are set up in the choc bloc? I have prewired rose, pic below...

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