Any electricians?

rhone81 · Scooby Slapper Joined: 05 Dec 2006 Karma :

The lights in my girlfriend's flat have gone after we (I Embarassed

) replaced her strip light with a normal one. Instead of one wire with L,N & E coming out of the ceiling there were 3 with L,N & E bundled together respectively. Got the new light wired up but all lights are now not working.

Took the fuse out to change it but never seen one like it before. It is a 5 amp Memera branded fuse and has a black plastic face and two pins at back which plug into box. Between the pins instead of something I would recognise as a fuse there is a hollow block.

Anyone know what type it is and/or where I can get one?

Cheers,

Graeme

tutton · World Chat Champion Joined: 04 Jan 2008 Karma :

Sparks!
is a sparkie.

Might be worth a pm, dosnt mean hes going to help tho Laughing

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Finglonga · World Chat Champion Joined: 27 Jul 2004 Karma :

Ariel Badger · Super Spammer Joined: 02 Dec 2006 Karma :

Does your girlfriend know what to do in the case of your electricution?
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rhone81 · Scooby Slapper Joined: 05 Dec 2006 Karma :

It's the one on the right: picture link

I need a shop that sells 5 amp version of this so I can replace it tomorrow. Raking Google just now...

S1KE · Brolly Dolly Joined: 20 May 2007 Karma :

you have wired it wrong, the three wires coming out of the ceiling with l,n,e are not what they seem, some of the black wires should have red sleeving over them making them switch lives, you need a electric screw driver and to disconnect your new light and switch the power on and figure out which wires are what!
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rhone81 · Scooby Slapper Joined: 05 Dec 2006 Karma :

S1KE · Brolly Dolly Joined: 20 May 2007 Karma :

well you prob have two switches for that light right? one comes from each switch and the other should be the main wire which prob goes to the next light, im not 100% sure as im a plumber! but deal with some basic part p electrics, but im 100% that you have your lives and switch llives mixed up, and without actually seeing the light i cant tell you where to put thewires Thumbs Up

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rhone81 · Scooby Slapper Joined: 05 Dec 2006 Karma :

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

Bwahahahah I love home-electricans who have no clue Laughing

Your house wiring is 3 plated which means you have a Loop, Neutral and Switched Live... TBH I don't think I trust you to get it right so I'd say call in someone who knows what they are doing...

If you've taken the markings off the cables and don't know what is what then really you should turn the power off and bell the cables out with a continuity tester.... turning the circuit on and seeing what's live will find one of the cables but that's all and you'd prob electrocute yourself anyways Laughing

I wouldn't reccomend doing it by trial-and-error... you could still get it wrong and the light function correctly if you accidentally switch the neutral.... which altho it'd work, you don't want it happening..

Just get someone in who knows what they are doing Thumbs Up

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yandy_yay · Brolly Dolly Joined: 01 Aug 2008 Karma :

Righto here we go. you should have 3 sets of twin and earth probably the old colours red/black but if its new wiring it'll be blue/brown...i digress....

from the consumer unit (fuse box) you'll have a twin and earth going to light fitting 1, then from there another twin and earth going to light fitting 2, then from there another twin and earth going to light fitting 3 and so on finally from the last fitting on that circuit a twin and earth back to the consumer unit.

Now from each light fitting there should be a 3rd twin and earth (it should be twin reds, but not always so as mentioned in the thread already there might be red tape around some black(or blue) wire, but again some shoddy workmen don't do that either)

so what we need to do is TURN OFF THE POWER first, then disconnect the new light an untangle all the wires so that the bare ends are not touching any other bare ends.

you need a tester of some sort either the old neon type or a multimeter that goes to atleast 250Vac.

repair replace the fuse and turn the electricty back on.

now with ur tester you should find only 2 of the red(or brown) wires are live (there i a possiblitly that only 1 will be live but i have only ever seen an incomplete circuit once) anyhows hopefully yu should have 2 lives, these pair of twin and earths form the loop you should now TURN OFF the power again and using suitable connectors join the red to red(or browns) and the black to black(or blues) you also need to take the nuetral from you new fitting to the black wires(or blue) and 1 of the remaining wires in the 3rd twin and earth to the reds(or brown) and finnally the other wire in the 3rd twin and earth to the live on your new fitting, join all the earths together and also earth your new fitting (if it has an earth point)

my mspaint skills are not good.

HTH
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Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

Yandy, there is a feed in and a feed out on the loop so only the feed in will be live if all the cables are seperated ....so only 1 cable will be live you'd still need to work out what is feed out and what is the switch live.

If both ends are live then you'd have issues as lighting circuits are RADIAL which means they go

Fuseboard ---> Light 1 ---> Light 2 ---> Light 3

NOT

Fuseboard --> Light 1--> Light 2 --> Light 3 --> Fuseboard

The above would mean 2 cables would be live at a fully disconnected light point.... and that is wrong!

So basically what I'm saying is if you disconnect all the cables at light 1 then light 1 would have a single live cable and light 2 and 3 will have no supply at all.
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yandy_yay · Brolly Dolly Joined: 01 Aug 2008 Karma :

erm.. it should be a complete loop back to the consumer unit so the loop gets fed from both ends.
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past bikes: (20 years ago) cg-125 (wriiten off), C-50 (thrashed n' finnaly scrapped), CZ-125 (nicked - never recovered, insurance payout was more than i paid for it !!!)
Current bikes: GN 125(now sold), Divvy 600s.

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

yandy_yay · Brolly Dolly Joined: 01 Aug 2008 Karma :

i stand corrected. Sorry.

in that case with the power off we could do a continuaty test from the switch to the ceiling to find which of the remaining 2 twin and earths is the one to the switch, leaving the other one that goes off to the next light fitting.
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past bikes: (20 years ago) cg-125 (wriiten off), C-50 (thrashed n' finnaly scrapped), CZ-125 (nicked - never recovered, insurance payout was more than i paid for it !!!)
Current bikes: GN 125(now sold), Divvy 600s.

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

carvell · Scuttler Joined: 05 Sep 2003 Karma :

I thought I'd have a go in paint too, but with labelling the connector blocks found in a ceiling rose!

OP - if you've simply connected all the L, N and E coloured wires together then as soon as you turn on the switch you'll blow the fuse again, as people have said you have to work out what's what!

https://www.bikechatforums.com/download.php?id=59566
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Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

Do people not know that if you hold CNTRL key whilst drawing in paint it makes the lines straight Laughing

10/10 for effort tho Laughing

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carvell · Scuttler Joined: 05 Sep 2003 Karma :

I've never seen a straight wire in a ceiling rose. I was going for realism. Wink

and no, I didn't know that
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yandy_yay · Brolly Dolly Joined: 01 Aug 2008 Karma :

LOL

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past bikes: (20 years ago) cg-125 (wriiten off), C-50 (thrashed n' finnaly scrapped), CZ-125 (nicked - never recovered, insurance payout was more than i paid for it !!!)
Current bikes: GN 125(now sold), Divvy 600s.

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

Cigaro · World Chat Champion Joined: 28 Mar 2007 Karma :

It's what they call a 'ring'.

Basically, one cable comes from the previous light fitting, one cable goes to the next. The red and black of those should be connected together within the fitting.

The third cable goes from the red wire of the input side, to a light switch, and then back to the actual light itself. The black wire on that cable is the 'switched live' that people have talked about. The other side of the light then connects to the neutral (black wire of the ring).

The earths should be tied together.

If you don't understand this, I suggest you call an electrician.

yandy_yay · Brolly Dolly Joined: 01 Aug 2008 Karma :

Sparks! · Sir Tart-a-lot Joined: 30 Aug 2003 Karma :

It is not called a ring!

Seriously people, don't give advice if you don't know what you're talking about.
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