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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Extending underground cables
Hi,
I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Is the choc-block wrapped in tape good enough? Are there sealed connectors that can be used? thanks dan |
#2
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Extending underground cables
"Dan Smithers" wrote in message ...
Hi, I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Is the choc-block wrapped in tape good enough? Are there sealed connectors that can be used? thanks Think laterally - put another light where the cable ends and use that as the joiner -- Bob Mannix (anti-spam is as easy as 1-2-3 - not |
#3
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Extending underground cables
Dan Smithers wrote:
I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Hopefully the cable is SWA (ie. armoured cable)? Is there a safe and effective way of extending this as I don't want to redo the entire drive? If it isn't SWA it ought to be redone anyway. Is the choc-block wrapped in tape good enough? I think you know the answer is "No". Are there sealed connectors that can be used? If it is SWA, you can use the 2-way versions of these http://www.tlc-direct.co.uk/Main_Ind...led/index.html http://www.tlc-direct.co.uk/Main_Ind...s_1/index.html |
#4
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Extending underground cables
In article ,
Dan Smithers wrote: I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Need to know what type of cable. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Yes. Is the choc-block wrapped in tape good enough? No. Are there sealed connectors that can be used? Yes. -- *Santa's helpers are subordinate clauses* Dave Plowman London SW To e-mail, change noise into sound. |
#5
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Extending underground cables
"Dan Smithers" wrote in message ... Hi, I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Is the choc-block wrapped in tape good enough? Is it mains? If so it isn't. Are there sealed connectors that can be used? If its 12V then a couple of cheap crimps and some shrink wrap would be OK. If its mains, buy a water proof connector or junction box or a joint kit like http://www.screwfix.com/prods/27874 |
#6
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Extending underground cables
Dan Smithers wrote:
Hi, I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Is the choc-block wrapped in tape good enough? Are there sealed connectors that can be used? thanks dan You do not say if this is mains or low voltage (i.e. 12V). That might make a difference to people's perception of the issues. -- Rod Hypothyroidism is a seriously debilitating condition with an insidious onset. Although common it frequently goes undiagnosed. www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org |
#7
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Extending underground cables
On Thu, 27 Nov 2008 09:41:40 +0000 someone who may be Dan Smithers
wrote this:- I am replacing a garden light. Replacing it, or fitting a new light in a new place and removing the old one? There is an underground cable from the house to the site, but the cable is too short. Too short to go into the new fitting by a few cm? Can you get a bit more out of the ground? The cable runs under the driveway and along a flower bed. What sort of cable, what depth, what protection, what voltage? Is there a safe and effective way of extending this as I don't want to redo the entire drive? Probably, though it depends on the type of cable. -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54 |
#8
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Extending underground cables
I am replacing a garden light. Replacing it, or fitting a new light in a new place and removing the old one? Removing the old one and replacing it with a different one in the same position. The contacts for the new one are not in the same place as the old ones. There is an underground cable from the house to the site, but the cable is too short. Too short to go into the new fitting by a few cm? Correct. Can you get a bit more out of the ground? I'm trying to get the information before I tackle the base at the weekend. With any luck I will be able to get a bit more out of the ground, but if I can't... The cable runs under the driveway and along a flower bed. What sort of cable, what depth, what protection, what voltage? Three core cable, mains voltage. The end I can see appears to have a casing that finishes a few inches before the end of the outer insulation. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Probably, though it depends on the type of cable. I shall probably go and visit the local Screwfix for their connector. Unfortunately the local electrical factor has closed so buying the extra half meter of SWA cable is going to be a bit awkward. |
#9
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Extending underground cables
On Thu, 27 Nov 2008 12:08:01 +0000, Dan Smithers wrote:
Too short to go into the new fitting by a few cm? Correct. Now we know a few more important details. How long is a "few cm"? If the cable is long enough to fully and properly(*) enter the enclosure with the terminals but the wires won't quite reach the terminals your suggested choc block and tape will do, suitably rated extension wires and choc block of course. Crimps would be better but to do those properly you need a rachet crimper not a simple pliers jobbie. (*) SWA should terminate in a proper gland on the enclosure to keep water of the cable and enclosure. IIRC the armouring should also be connected to the CPC. -- Cheers Dave. |
#10
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Extending underground cables
"Dan Smithers" wrote in message ... I am replacing a garden light. Replacing it, or fitting a new light in a new place and removing the old one? Removing the old one and replacing it with a different one in the same position. The contacts for the new one are not in the same place as the old ones. There is an underground cable from the house to the site, but the cable is too short. Too short to go into the new fitting by a few cm? Correct. Can you get a bit more out of the ground? I'm trying to get the information before I tackle the base at the weekend. With any luck I will be able to get a bit more out of the ground, but if I can't... The cable runs under the driveway and along a flower bed. What sort of cable, what depth, what protection, what voltage? Three core cable, mains voltage. The end I can see appears to have a casing that finishes a few inches before the end of the outer insulation. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Probably, though it depends on the type of cable. I shall probably go and visit the local Screwfix for their connector. Unfortunately the local electrical factor has closed so buying the extra half meter of SWA cable is going to be a bit awkward. TLC sell SWA by the meter and deliver for free AWEM |
#11
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Extending underground cables
Dan Smithers wrote:
Hi, I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Is the choc-block wrapped in tape good enough? Only if the join is inside the new fitting. i.e. you can extend the wires in the cable to make them reach new terminal positions so long as the cable itself and its outer sheath still get into the fitting. Are there sealed connectors that can be used? There are - see the TLC links. You can identify exactly what type of cable you have by looking he http://wiki.diyfaq.org.uk/index.php?title=Cable or possibly: http://wiki.diyfaq.org.uk/index.php?title=Flex (note the second link may be broken at the mo) The answer will dictate what method you can use to make a joint outside or underground if you need to. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#12
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Extending underground cables
Unfortunately the local electrical factor has closed so buying the extra half meter of SWA cable is going to be a bit awkward. TLC sell SWA by the meter and deliver for free thanks. I've also spotted that I'm not too far from their Coulsden branch. I think that an extra meter of cable, a short length of flexible ducting so the cable can be accessed without breaking the concrete base that I'm proposing and a resin-filled connector will be the way to go. Too late for this weekend though. I expect that 1.5mm 3-core will be more than enough for a light. |
#13
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Extending underground cables
Dan Smithers formulated the question :
Hi, I am replacing a garden light. There is an underground cable from the house to the site, but the cable is too short. The cable runs under the driveway and along a flower bed. That depends upon the cable type. The standard method for an underground armoured cable joint would be a special joint made by the likes of 3m. It is basically connectors and a clamp + link for the earthing armour. In the kit is a box shape for a mold. Once jointed and encased, you pour a two part resin compound into the mold, which then makes the whole thing waterproof and solid. The resin is fairly similar to Araldite. Is there a safe and effective way of extending this as I don't want to redo the entire drive? Is the choc-block wrapped in tape good enough? Absolutely not! Are there sealed connectors that can be used? See above. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |
#14
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Extending underground cables
Dan Smithers wrote:
Unfortunately the local electrical factor has closed so buying the extra half meter of SWA cable is going to be a bit awkward. TLC sell SWA by the meter and deliver for free thanks. I've also spotted that I'm not too far from their Coulsden branch. I think that an extra meter of cable, a short length of flexible ducting so the cable can be accessed without breaking the concrete base that I'm proposing and a resin-filled connector will be the way to go. Too late for this weekend though. I expect that 1.5mm 3-core will be more than enough for a light. You probably only need two core - you use the armour as an earth. http://wiki.diyfaq.org.uk/index.php?...rmour_as_a_CPC -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#15
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Extending underground cables
"Dan Smithers" wrote in message ... Unfortunately the local electrical factor has closed so buying the extra half meter of SWA cable is going to be a bit awkward. TLC sell SWA by the meter and deliver for free thanks. I've also spotted that I'm not too far from their Coulsden branch. I think that an extra meter of cable, a short length of flexible ducting so the cable can be accessed without breaking the concrete base that I'm proposing and a resin-filled connector will be the way to go. Too late for this weekend though. I expect that 1.5mm 3-core will be more than enough for a light. The TLC guys at Coulsdon are very helpfull. Peter |
#16
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Extending underground cables
On Thu, 27 Nov 2008 12:08:01 +0000 someone who may be Dan Smithers
wrote this:- Removing the old one and replacing it with a different one in the same position. The contacts for the new one are not in the same place as the old ones. Can you not mount it a few cm lower? -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54 |
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