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-   -   Feeding cables in 20mm round conduit (https://www.diybanter.com/uk-diy/1808-feeding-cables-20mm-round-conduit.html)

Andy Hide September 9th 03 08:50 AM

Feeding cables in 20mm round conduit
 
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.

Does anyone have any tips on feeding the cable through the conduit ? I
am using inspection bends to make a couple of 90 degree turns and the
cable is getting stuck on the corners. Even with access to the corners
by removing the covers it still seems impossible to feed the cable.

I am using 2.5mm cable for the power socket. Can you use the cable
without it's external white rubber sheath when it is inside plastic
conduit ? This would obviously give a lot more room and make feeding a
single wire at a time easier. The PVC conduit itself must surely be
performing the same if not far better job than the white sheath.

Andy.

[email protected] September 9th 03 09:04 AM

Feeding cables in 20mm round conduit
 
Andy Hide wrote:
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.

Does anyone have any tips on feeding the cable through the conduit ? I
am using inspection bends to make a couple of 90 degree turns and the
cable is getting stuck on the corners. Even with access to the corners
by removing the covers it still seems impossible to feed the cable.

I am using 2.5mm cable for the power socket. Can you use the cable
without it's external white rubber sheath when it is inside plastic
conduit ? This would obviously give a lot more room and make feeding a
single wire at a time easier. The PVC conduit itself must surely be
performing the same if not far better job than the white sheath.

Yes, it is normal practice to use unsheathed cable inside conduits.
There are special lubricants available to make it easier to feed cable
through conduits (tallow comes to mind, is that right?).

--
Chris Green )

Tim Mitchell September 9th 03 09:12 AM

Feeding cables in 20mm round conduit
 
In article , Andy Hide
writes
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.

Does anyone have any tips on feeding the cable through the conduit ? I
am using inspection bends to make a couple of 90 degree turns and the
cable is getting stuck on the corners. Even with access to the corners
by removing the covers it still seems impossible to feed the cable.

I am using 2.5mm cable for the power socket. Can you use the cable
without it's external white rubber sheath when it is inside plastic
conduit ? This would obviously give a lot more room and make feeding a
single wire at a time easier. The PVC conduit itself must surely be
performing the same if not far better job than the white sheath.

Yes, you should be using "singles" in conduit, not twin & earth,
otherwise it's virtually impossible to feed. You can buy the individual
red, black and green/yellow cables at electrical wholesalers (I'm not
sure if the sheds sell that sort of thing). If you use your existing
cable and strip the external sheath off, you will need to get some
insulated earth conductor.
--
Tim Mitchell

Andrew Gabriel September 9th 03 09:39 AM

Feeding cables in 20mm round conduit
 
In article ,
Tim Mitchell writes:
Yes, you should be using "singles" in conduit, not twin & earth,
otherwise it's virtually impossible to feed. You can buy the individual
red, black and green/yellow cables at electrical wholesalers (I'm not
sure if the sheds sell that sort of thing).


Some do, but IME a wholesaler will be cheaper.

If you use your existing
cable and strip the external sheath off, you will need to get some
insulated earth conductor.


Singles are stranded conductors which makes them easier to feed.
T&E isn't (until larger sizes).

You can get draw wires (springy metal or plastic) which easily push
through conduit and then pull the singles back.

--
Andrew Gabriel

Tim Mitchell September 9th 03 10:19 AM

Feeding cables in 20mm round conduit
 
In article , Andrew Gabriel
writes
In article ,
Tim Mitchell writes:

If you use your existing
cable and strip the external sheath off, you will need to get some
insulated earth conductor.


Singles are stranded conductors which makes them easier to feed.
T&E isn't (until larger sizes).

Yes, that's true, it's still going to be awful to feed through even
without the outer sheath. Not to mention having to strip it all. Better
go out and get the real thing, it isn't expensive, though you might have
to buy a 100m drum.
--
Tim Mitchell

Dave Plowman September 9th 03 10:45 AM

Feeding cables in 20mm round conduit
 
In article ,
wrote:
Can you use the cable
without it's external white rubber sheath when it is inside plastic
conduit ? This would obviously give a lot more room and make feeding a
single wire at a time easier. The PVC conduit itself must surely be
performing the same if not far better job than the white sheath.

Yes, it is normal practice to use unsheathed cable inside conduits.
There are special lubricants available to make it easier to feed cable
through conduits (tallow comes to mind, is that right?)


IIRC, single cable has rather thicker insulation than those used inside
TW&E.

--
*Eagles may soar, but weasels don't get sucked into jet engines *

Dave Plowman London SW 12
RIP Acorn

PoP September 9th 03 12:08 PM

Feeding cables in 20mm round conduit
 
On 9 Sep 2003 08:04:14 GMT, wrote:

Yes, it is normal practice to use unsheathed cable inside conduits.
There are special lubricants available to make it easier to feed cable
through conduits (tallow comes to mind, is that right?).


When I started work (30 years ago) we had to feed cable thru some
plastic sheathing - we used talcum powder to ease the path, and it
worked very well Just before pushing the cables in you dust a little
talc into the opening. Could be a bit messy though.

Please don't take my word for it that talcum powder is okay for this
use though, the regs will have changed more than a little in the time.

PoP


Dave September 9th 03 04:13 PM

Feeding cables in 20mm round conduit
 
Down in Spain, all wiring is done this way (and terrifying it is too). You
get a bit of plastic coated metal, a bit like a net curtain hanger, but 10
or 20 metres long, which goes straight through and round any corners. The
you attach the flex to the other end, and just pull it through.

If you can't get these things in the UK, I suspect that a good length of net
curtain hanger would do perfectly.


Timbo


"Andy Hide" wrote in message
m...
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.

Does anyone have any tips on feeding the cable through the conduit ?




Tim.. September 9th 03 08:28 PM

Feeding cables in 20mm round conduit
 

"Tim" wrote in message
...
On Tue, 09 Sep 2003 12:08:09 +0100, PoP
wrote:


I needed a small piece of single just yesterday, so i stripped it out
of a broken angle grinders lead, and the inside of that was covered in
white powder?


French chalk. Talc will work, but f/chalk is better.

Tim..


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Tim.. September 9th 03 08:30 PM

Feeding cables in 20mm round conduit
 

"Tim Mitchell" wrote in message
...
In article , Andrew Gabriel
writes
In article ,
Tim Mitchell writes:

If you use your existing
cable and strip the external sheath off, you will need to get some
insulated earth conductor.


Singles are stranded conductors which makes them easier to feed.
T&E isn't (until larger sizes).

Yes, that's true, it's still going to be awful to feed through even
without the outer sheath. Not to mention having to strip it all. Better
go out and get the real thing, it isn't expensive, though you might have
to buy a 100m drum.


Single is stranded and alot easier to feed, however your meant to use a fish
wire- push that through first and it has a hooked end for gripping the
cables which you then pull through. Dead easy.

Wholesaler will stock it- about a £fiver.

Tim..

Tim..


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Version: 6.0.515 / Virus Database: 313 - Release Date: 01/09/2003



David September 10th 03 07:57 AM

Feeding cables in 20mm round conduit
 
(Andy Hide) wrote in message om...
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.


On a separate note, I am currently wiring up the power circuits to my
garage/workshop. I was just intending to surface mount the cables
using normal cable clips - is that OK? Or is it mandatory (or just
advisable?) to use conduit? Even up in the rafters of the garage
where most of the cables will run?

Thanks
David

[email protected] September 10th 03 12:03 PM

Feeding cables in 20mm round conduit
 
David wrote:
(Andy Hide) wrote in message om...
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.


On a separate note, I am currently wiring up the power circuits to my
garage/workshop. I was just intending to surface mount the cables
using normal cable clips - is that OK? Or is it mandatory (or just
advisable?) to use conduit? Even up in the rafters of the garage
where most of the cables will run?

Surface clipped wiring is OK except where it might be susceptible to
mechanical damage. In a garage/workshop wiring out of the normal
working areas can be just clipped but I think it should be protected
(mini trunking or whatever) when it runs close to benches etc.

--
Chris Green )

Rick Hughes September 10th 03 08:03 PM

Feeding cables in 20mm round conduit
 

"David" wrote in message
om...
(Andy Hide) wrote in message

om...
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.


On a separate note, I am currently wiring up the power circuits to my
garage/workshop. I was just intending to surface mount the cables
using normal cable clips - is that OK? Or is it mandatory (or just
advisable?) to use conduit? Even up in the rafters of the garage
where most of the cables will run?



Thick wall PVC conduit or trunking is a much better idea - gives a
reasonable degree of mechanical protection.



Rick Hughes September 11th 03 08:49 PM

Feeding cables in 20mm round conduit
 

"Andy Hide" wrote in message
m...
I am wiring a light up in the garage and adding a double socket and
have decided to use 20mm round conduit to house the cabling.

Does anyone have any tips on feeding the cable through the conduit ? I
am using inspection bends to make a couple of 90 degree turns and the
cable is getting stuck on the corners. Even with access to the corners
by removing the covers it still seems impossible to feed the cable.

I am using 2.5mm cable for the power socket. Can you use the cable
without it's external white rubber sheath when it is inside plastic
conduit ? This would obviously give a lot more room and make feeding a
single wire at a time easier. The PVC conduit itself must surely be
performing the same if not far better job than the white sheath.



I have a spray of silicon lubricant ... quick spray over cables and they
slide in easy.

Rick

Andy.





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