Two cables through conduit

[diyterry]

Morning, hope your all well. Is it okay to run a 2.5mm and a 1.5mm cable through the same 20mm conduit?

 

[Risteard]

As conduit is designed for singles cables it's not intended to be restricted to only one cable. But you haven't stated what it is you're trying to achieve.

 

[Deleted member 26818]

I take it, you mean T&E cables?
Yes you can run 2 T&E cables through conduit.

 

[westward10]

Might be tricky hauling them through bends can you not use singles.

 

[diyterry]

Yes, your quite right it is fiddly. I'am going to run two conduits down the wall and not be so lazy.

 

[diyterry]

I take it, you mean T&E cables?
Yes you can run 2 T&E cables through conduit.

Yes indeed

 

[diyterry]

As conduit is designed for singles cables it's not intended to be restricted to only one cable. But you haven't stated what it is you're trying to achieve.

I was just being lazy and run one length of conduit, but having tried getting two lengths of cable through the conduit I am going to put two runs of conduit in.

 

[Silly Sausage]

You could use 25mm conduit instead

 

[rapparee]

You could use 25mm conduit instead

Or lube.

https://www.NoLinkingToThis/p/ideal...kV31aMumPoSuhyfHG4j0EgBnGgiHtxIBoCRQQQAvD_BwE

 

[telectrix]

if it's a straight run with no bends 2 cables will be a doddle.

 

[pirate]

My pal who was assisting me with feeding t&e through conduit sprayed them with a silicone spray from skewfax, and all went well until my CK strippers refused to grip the insulation...

 

[PEG]

I use that silicone spray on my mermaid costume.....when i don't want unnecessary attention

 

[Shoei]

Or lube.

https://www.NoLinkingToThis/p/ideal...kV31aMumPoSuhyfHG4j0EgBnGgiHtxIBoCRQQQAvD_BwE

Pulling lubricant? Thought that was just another name for vodka.

 

[Tes369]

I did an Aiport earlier in the year and the lighting circuit was in 25mm conduit wired in 3 core t&e in 2.5mm and yes it's not easy to get hold of. And in LSF plenty of swearing going on during the install. And the reason why not in singles because it was run along tray !!

 

[buzzlightyear]

Or lube.

it will go in a treat.

 

[chris gray]

We did a school last year where the architect had designed lighting in 2.5 lsf. Just a nightmare

 

[chris gray]

We did a school last year where the architect had designed lighting in 2.5 lsf. Just a nightmare

 

[buzzlightyear]

can you repeat that CG, I missed that .

 

[Risteard]

Yellow 77 is good for conduit. Again singles are the correct cable type for a containment system like this though.

 

[buzzlightyear]

We did a school last year where it burned down from the lighting in bell wirer , Just a nightmare.

 

[Marvo]

I know in our local regs (non-UK) there's a maximum percentage you can fill a conduit because the current rating afforded to cables installed by this method rely on there being some air flow through the conduit. I've got a vague recollection from a thread on this forum a few years ago that there's a similar reg in the UK as well.

 

[buzzlightyear]

https://www.rm-electrical.com/wp-co...uit-Trunking-Capacity-Chart-RM-Technical1.pdf

 

[Marvo]

For bonus points Buzz, have you got a UK regulation number?

 

[buzzlightyear]

1. Where it is intended to connect the cables in this table to equipment or accessories designed to operate at a temperature lower than the maximum operating temperature of the cable, the cables should be rated at the maximum operating temperature of the equipment or accessory (see Regulation 512.1.5).
2. Where it is intended to group a cable in this table with other cables, the cable should be rated at the lowest of the maximum operating temperatures of any of the cables in the group (see Regulation 512.1.5).
3. For cables having flexible conductors see section 2.4 of this appendix for adjustment factors for current-carrying capacity and voltage drop.

 

[PEG]

it will go in a treat.

....Just because you CAN fit something,somewhere....does not mean it is either necessary or enjoyable (Hypocrates 2nd law)

 

[Wilko]

Hi - the OSG Appendix E has the numbers and reminds us to look at Reg 523.5 (rating factors for cable grouping).

My take is these conduit factors are about good practice that is likely to not result in damaged cables during installation. But the designer still needs to ensure the appropriate CCC de-rating factors are used when grouping the conductors.

 

[buzzlightyear]

PEG ,at the xmas market at your neck of the woods.

 

[jay sean]

yellow 66

 

[Risteard]

yellow 66

Is that a cheaper version of Yellow 77?

 

[PEG]

PEG ,at the xmas market at your neck of the woods.

Aaahhh,the joy of the season...the festive weapons search...the sniffer dogs...the vehicle proof perimeter...Wonder,at the hand-made Bavarian wooden toys,made in India...the Dutch pancake seller,who occasionally lapses back to his native Salford accent...dodge the yuletide pickpockets...watch the drunken,marital brawl...absorb the splendour of scouse santa hat vendor,and his well hidden permit...slide away,and relax as you set off half-way home,on an overloaded tram,where abuse and threats from armed youths,entertain you,before discharging in to a packed car-park,where your vehicles side window's shattered glass,glistens like a Winter morn...
I LOVE this town,and this time of year is always so special

(Brought to you by MAIM, Manchester Authority on Investigating Merriment)

 

[buzzlightyear]

Love Manchester, where it all goes on , better then scousapool..
Not knocking it , but their seams to be a lot of john bishops .

 

[PEG]

I trust you enjoy the experience,and get to see us at our best and if not,remember as long as you are near to conglomerate coffee chain,there will be a nervous,poorly trained first-aider to be embarrassed in to an attempt at stemming your flowing arterial knife wound,as the teenage assailant,makes off with your empty Gluwein mug...

 

[CACJL]

My pal who was assisting me with feeding t&e through conduit sprayed them with a silicone spray from skewfax, and all went well until my CK strippers refused to grip the insulation...

Use talcum powder.

 

[Pete999]

Use talcum powder.

Looks like maybe the conduit isn't big enough for the cables you are using, judging from your description OP

 

[Toneyz]

You should be able to get a 1.5 and 2.5 T&E through a straight conduit run of 20mm conduit.

 

[Pete999]

You should be able to get a 1.5 and 2.5 T&E through a straight conduit run of 20mm conduit.

At a push

 

[Jjc]

As conduit is designed for singles cables it's not intended to be restricted to only one cable. But you haven't stated what it is you're trying to achieve.

Some of the questions in this forum are obviously from the unskilled. WHY are they carrying out electrical works?

 

[Toneyz]

At a push

The PVC sheath is not as thick as it used to be I have noticed the difference over the years.

 

[Pete999]

The PVC sheath is not as thick as it used to be I have noticed the difference over the years.

Still a bit of a push Ant, imo anyway.