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#1
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Odd wiring?
Changed some light fittings today, like for like, in a house perhaps 5 years
old. Strange wiring in the ceiling roses. I'd expect; 2 x blacks + neutral to lamp. 3 x reds joined. 1 x black with red sleeve + live to lamp. They were wired; 2 x blacks + neutral to lamp. 2 x red + 1 x black joined. 1 x red + live to lamp. So in other words, the switch cable was the opposite way around from the usual. Thought it was a mistake at first, but all the lights upstairs & down were wired that way. It was a particularly neat & tidy job as well - workmanlike (lovely word) describes it, obviously deliberate. Customer has had the house from new, no work on lights since they moved in. Obviously this way of wiring works, but; Is it in accordance with the regulations and why would it be wired that way? -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#2
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Odd wiring?
The Medway Handyman coughed up some electrons that declared:
Changed some light fittings today, like for like, in a house perhaps 5 years old. Strange wiring in the ceiling roses. I'd expect; 2 x blacks + neutral to lamp. 3 x reds joined. 1 x black with red sleeve + live to lamp. They were wired; 2 x blacks + neutral to lamp. 2 x red + 1 x black joined. 1 x red + live to lamp. So in other words, the switch cable was the opposite way around from the usual. Thought it was a mistake at first, but all the lights upstairs & down were wired that way. It was a particularly neat & tidy job as well - workmanlike (lovely word) describes it, obviously deliberate. Customer has had the house from new, no work on lights since they moved in. Obviously this way of wiring works, but; Is it in accordance with the regulations and why would it be wired that way? Hi Dave, Your former method is a valid and usual method for certain installations (ie there are many valid variants, but this is a perfectly normal one) (colour change excepted). The method you found - it does appear, the way you described it, to simply have the switch cable the "wrong way" round. However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. No particular reason it was wired that way, other than the installer was waiting to catch you out. It's not the best way as seeking to catch people out without a good reason is considered a "bad thing" (TM) but it's sound. Seriously, it's more conventional to take the red or brown as the supply live, but it's not prescriptive AFAIK. Stick a red sleeve on and you've corrected the only regulatory breach that seems apparent. However, that's only based on what you've said. There may (or not) be other problems lurking. You didn't mention earths - are there any? There should be in a 5 year old installation (which should have been done to the 16th) and it does affect whether you should be adding any Class I accessories (ie needing an earth, not double insulated). Cheers Tim |
#3
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Odd wiring?
Tim S wrote:
The Medway Handyman coughed up some electrons that declared: Changed some light fittings today, like for like, in a house perhaps 5 years old. Strange wiring in the ceiling roses. I'd expect; 2 x blacks + neutral to lamp. 3 x reds joined. 1 x black with red sleeve + live to lamp. They were wired; 2 x blacks + neutral to lamp. 2 x red + 1 x black joined. 1 x red + live to lamp. So in other words, the switch cable was the opposite way around from the usual. Thought it was a mistake at first, but all the lights upstairs & down were wired that way. It was a particularly neat & tidy job as well - workmanlike (lovely word) describes it, obviously deliberate. Customer has had the house from new, no work on lights since they moved in. Obviously this way of wiring works, but; Is it in accordance with the regulations and why would it be wired that way? Hi Dave, Your former method is a valid and usual method for certain installations (ie there are many valid variants, but this is a perfectly normal one) (colour change excepted). The method you found - it does appear, the way you described it, to simply have the switch cable the "wrong way" round. However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. No particular reason it was wired that way, other than the installer was waiting to catch you out. It's not the best way as seeking to catch people out without a good reason is considered a "bad thing" (TM) but it's sound. Seriously, it's more conventional to take the red or brown as the supply live, but it's not prescriptive AFAIK. Stick a red sleeve on and you've corrected the only regulatory breach that seems apparent. However, that's only based on what you've said. There may (or not) be other problems lurking. You didn't mention earths - are there any? There should be in a 5 year old installation (which should have been done to the 16th) and it does affect whether you should be adding any Class I accessories (ie needing an earth, not double insulated). 'Earths ommited for simplicity' - yes there were earths. -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#4
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Odd wiring?
The Medway Handyman coughed up some electrons that declared:
'Earths ommited for simplicity' - yes there were earths. Sounds OK then Unless anyone thinks of any weirdisms I didn't... Cheers Tim |
#5
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Odd wiring?
"Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. I would be more interested in knowing if the far end has a red sleeve. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? |
#6
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Odd wiring?
dennis@home wrote:
"Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. I would be more interested in knowing if the far end has a red sleeve. You mean the switch end? I'm going back Friday to finish another job, I could have a look. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? Sorry, knew what? -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#7
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Odd wiring?
dennis@home coughed up some electrons that declared:
"Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. You do Dennis. IEE regs, correct identification of conductors. I'll quote it verbatim if you like, but, no matter how obvious it seems, it *should* be sleeved correctly. I would be more interested in knowing if the far end has a red sleeve. That is true. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? |
#8
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Odd wiring?
In article ,
"dennis@home" writes: "Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. I would be more interested in knowing if the far end has a red sleeve. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? IME, the red sleeve is fitted incorrectly sufficiently often that it must always be ignored, and would be safer if it wasn't used at all. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
#9
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Odd wiring?
Andrew Gabriel wrote:
In article , "dennis@home" writes: "Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. I would be more interested in knowing if the far end has a red sleeve. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? IME, the red sleeve is fitted incorrectly sufficiently often that it must always be ignored, and would be safer if it wasn't used at all. It often isn't used at all. I change loads of light fittings for people, very rare to ever see a sleeve. Another problem is that they easily fall off when you undo the terminal, I tape them in place with red tape before I undo them. -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#10
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Odd wiring?
On Thu, 28 May 2009 07:35:39 +0000, The Medway Handyman wrote:
Andrew Gabriel wrote: In article , "dennis@home" writes: "Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. I would be more interested in knowing if the far end has a red sleeve. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? IME, the red sleeve is fitted incorrectly sufficiently often that it must always be ignored, and would be safer if it wasn't used at all. It often isn't used at all. I change loads of light fittings for people, very rare to ever see a sleeve. Another problem is that they easily fall off when you undo the terminal, I tape them in place with red tape before I undo them. ========================================= Use a digital camera for reference and record purposes. It's quick, easy and almost fool-proof. Cic. -- ========================================== Using Ubuntu Linux Windows shown the door ========================================== |
#11
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Odd wiring?
The Medway Handyman wrote:
So in other words, the switch cable was the opposite way around from the usual. Nothing wrong with that - although it ought to have a sleeve on the black. Obviously this way of wiring works, but; Is it in accordance with the regulations and why would it be wired that way? Yup - basically the requirement is correctly identify the conductors if their natural colour is not correct. The only time you can't do this is to re-label a yellow/green striped earth wire. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#12
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Odd wiring?
"The Medway Handyman" wrote in message om... Andrew Gabriel wrote: In article , "dennis@home" writes: "Tim S" wrote in message ... However, the only technical error I can see is the lack of red sleeve on the live (normal parlance)/ line or phase (technical parlance) wire. You don't really need the red sleeve.. you open it up and can see the black is connected to the live. I would be more interested in knowing if the far end has a red sleeve. The sleeve is very useful for remembering which is the switched live though. Makes you wonder how they knew? IME, the red sleeve is fitted incorrectly sufficiently often that it must always be ignored, and would be safer if it wasn't used at all. It often isn't used at all. I change loads of light fittings for people, very rare to ever see a sleeve. Another problem is that they easily fall off when you undo the terminal, I tape them in place with red tape before I undo them. -- Dave - The Medway Handyman www.medwayhandyman.co.uk It is rare to see a sleeve. I always cut the exposed copper off the switched live when changing a pendant to a fitting so that when the sleeve falls off I know which cable it is. It is just a case of stripping it back again. As to your odd wiring I know one old sparky who always wires lights up that way (with sleeving). He says that the first connection he makes is the black to premanent live and then he cannot get anything mixed up. Totally legal. Adam |
#13
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Odd wiring?
ARWadsworth coughed up some electrons that declared:
It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- TBH, I'll probably stop using sleeves and start using a wrap of same coloured tape. Sleeves always end up falling off when people fiddle so even if it was perfect to start with, it probably doesn't stay that way. Cue discussion on hellerman sleeves! Cheers Tim |
#14
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Odd wiring?
Tim S wrote:
ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! TBH, I'll probably stop using sleeves and start using a wrap of same coloured tape. Sleeves always end up falling off when people fiddle so even if it was perfect to start with, it probably doesn't stay that way. Cue discussion on hellerman sleeves! with oil and fanny stretchers... ;-) -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#15
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Odd wiring?
John Rumm wrote:
Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! TBH, I'll probably stop using sleeves and start using a wrap of same coloured tape. Sleeves always end up falling off when people fiddle so even if it was perfect to start with, it probably doesn't stay that way. Cue discussion on hellerman sleeves! with oil and fanny stretchers... ;-) Hellerman oil was banned from the fast jet industry more than 20 years ago. It was rotting the sleeves. Dave |
#16
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Odd wiring?
On Thu, 28 May 2009 22:50:36 +0100, Dave
had this to say: Hellerman oil was banned from the fast jet industry more than 20 years ago. It was rotting the sleeves. Only at high speeds? :-) I used to use Johnson's baby oil (or (my own!) saliva) for Hellerman sleeves, on coaxial jumpers. -- Frank Erskine |
#17
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Odd wiring?
Frank Erskine wrote:
On Thu, 28 May 2009 22:50:36 +0100, Dave had this to say: Hellerman oil was banned from the fast jet industry more than 20 years ago. It was rotting the sleeves. Only at high speeds? :-) Don't know, don't care. I was on the mechanical side :-) We had our own problems in using vasaline, or silicone lubricants. I used to use Johnson's baby oil (or (my own!) That could have been worded better. :-) saliva) for Hellerman sleeves, on coaxial jumpers. Dave |
#18
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Odd wiring?
"John Rumm" wrote in message ... Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! I seldom sleeve my own stuff.. I am still using some triple and earth I had left over for the switch drops. |
#19
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Odd wiring?
"dennis@home" wrote in message ... "John Rumm" wrote in message ... Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! I seldom sleeve my own stuff.. I am still using some triple and earth I had left over for the switch drops. What do you do with the spare core? And stop being tight with the sleeving. It is about £3 for 100m. Adam |
#20
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Odd wiring?
"ARWadsworth" wrote in message om... "dennis@home" wrote in message ... "John Rumm" wrote in message ... Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! I seldom sleeve my own stuff.. I am still using some triple and earth I had left over for the switch drops. What do you do with the spare core? And stop being tight with the sleeving. It is about £3 for 100m. I leave it there in case I want to make it a two way or twin sometime. You need to fold it back and tape it but the colour of the tape doesn't matter much. |
#21
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Odd wiring?
"dennis@home" wrote in message ... "ARWadsworth" wrote in message om... "dennis@home" wrote in message ... "John Rumm" wrote in message ... Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! I seldom sleeve my own stuff.. I am still using some triple and earth I had left over for the switch drops. What do you do with the spare core? And stop being tight with the sleeving. It is about £3 for 100m. I leave it there in case I want to make it a two way or twin sometime. You need to fold it back and tape it but the colour of the tape doesn't matter much. It should be sleeved green/yellow and connected to earth until you wish to use it. But there is no harm in using 3core and earth instead of twin and earth for switch drops, especially if you may use the spare core in the future. Adam |
#22
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Odd wiring?
On Thu, 28 May 2009 22:50:36 +0100, Dave wrote:
Hellerman oil was banned from the fast jet industry more than 20 years ago. It was rotting the sleeves. I discovered in the late '60s that it also made the sleeves conductive. Multiway connector with all wires sleeved and you could measure the resistance with an ordinary AVO 8. -- Geo |
#23
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Odd wiring?
ARWadsworth wrote:
"dennis@home" wrote in message ... "ARWadsworth" wrote in message om... "dennis@home" wrote in message ... "John Rumm" wrote in message ... Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! I seldom sleeve my own stuff.. I am still using some triple and earth I had left over for the switch drops. What do you do with the spare core? And stop being tight with the sleeving. It is about £3 for 100m. I leave it there in case I want to make it a two way or twin sometime. You need to fold it back and tape it but the colour of the tape doesn't matter much. It should be sleeved green/yellow and connected to earth until you wish to use it. Why is that Adam? Dave |
#24
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Odd wiring?
Geo wrote:
On Thu, 28 May 2009 22:50:36 +0100, Dave wrote: Hellerman oil was banned from the fast jet industry more than 20 years ago. It was rotting the sleeves. I discovered in the late '60s that it also made the sleeves conductive. Multiway connector with all wires sleeved and you could measure the resistance with an ordinary AVO 8. Now that *would* cause confusion :-) Dave |
#25
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Odd wiring?
"Dave" wrote in message ... ARWadsworth wrote: "dennis@home" wrote in message ... "ARWadsworth" wrote in message om... "dennis@home" wrote in message ... "John Rumm" wrote in message ... Tim S wrote: ARWadsworth coughed up some electrons that declared: It is rare to see a sleeve. Sorry - I only did my 4 day course a few months back - still indoctrinated! ;- if its any consolation - I always sleeve! I seldom sleeve my own stuff.. I am still using some triple and earth I had left over for the switch drops. What do you do with the spare core? And stop being tight with the sleeving. It is about £3 for 100m. I leave it there in case I want to make it a two way or twin sometime. You need to fold it back and tape it but the colour of the tape doesn't matter much. It should be sleeved green/yellow and connected to earth until you wish to use it. Why is that Adam? Dave Unused cores should not be left "floating". Apart from the voltages that could be induced into unearthed spare cores it is more important that there is a possiblilty that they could make contact with live parts resulting in the other end of the conductor becoming live. Adam |
#26
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Odd wiring?
ARWadsworth wrote:
"Dave" wrote in message ... Why is that Adam? Dave Unused cores should not be left "floating". Apart from the voltages that could be induced into unearthed spare cores it is more important that there is a possiblilty that they could make contact with live parts resulting in the other end of the conductor becoming live. I with some one had told the plumber who installed our boiler a few years ago. He used 4 core cable from the boiler to the timer and just snipped the black at the end of one cable, plus he made a mess of getting 4 cores into one terminal of the timer. He left a portion of the cores showing. I am in the process of corecting it right now. Dave |
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