Wago's inside conduit?

[SUNRAY]

11!

That's close enough for me Funnily I'd originally written 10-12.

If I'm honest the last time I handled a conduit bender was 2007 and probably the last time I got involved with wire and tube factors too

 

[JohnW2]

We'll have to differ on that one, the capacity of a 20mm conduit is about 10 from memory, ...

'Capacity' and ease of installation are two rather different things!

adding a second set of 3 in a short straight run such as OP. one would hardly notice the initial set

Maybe. My personal experience (of 20mm conduit) is very limited. However, my experiences of getting cables through relatively massive ducts/pipes (50-100mm diameter) is that adding additional cables can be anything but a trivial exercise, even if there is vast amount of 'space' ('capacity') available for the additional cable)s).

 

[Harry Bloomfield]

Maybe. My personal experience (of 20mm conduit) is very limited. However, my experiences of getting cables through relatively massive ducts/pipes (50-100mm diameter) is that adding additional cables can be anything but a trivial exercise, even if there is vast amount of 'space' ('capacity') available for the additional cable)s).

Yep, pull plastic covered in too fast, with others in place, and the friction can melt and glue themselves together.

 

[SUNRAY]

'Capacity' and ease of installation are two rather different things!

Oh yes definitely,

Maybe. My personal experience (of 20mm conduit) is very limited. However, my experiences of getting cables through relatively massive ducts/pipes (50-100mm diameter) is that adding additional cables can be anything but a trivial exercise, even if there is vast amount of 'space' ('capacity') available for the additional cable)s).

I doubt anyone who runs wire/cale in tube would say anything different

However in the case of so much spare capacity created by 3 2.5mm² singles on a 20mm tube I believe my comment holds up. In the 2007 job I referred to previously there was a straight 8m run of 25mm steel tube with a tee box 3m along, I pulled in single handed twelve 1.5mm² and one 6mm² CPC the whole distance and terminated them. I'd expected to have help to pull the cables but it was not there when wanted so I pulled in another eight 1.5mm² and a 6mm² into the short length with no difficulty. I haven't looked at the factors but I suspect they are close to the limit (originally a second tube was planned for the short run when it was expected to be 10m and 5m). The other side of the hall the corresponding 3m run for 8+1 was existing 20mm tube and somewhat more effort but still not difficult.

Yep, pull plastic covered in too fast, with others in place, and the friction can melt and glue themselves together.

I have the T Shirts. On one job the customer decided their own staff could pull the cables into the 100x100 trunking far cheaper than our quote, after wiring up and testing to find faults I discovered they had blown a thin draw line in then pulled in a 6 or 8mm draw rope for the 4 bunches of five 4mm² singles (4x 3ph+N+E) using the forklift something approaching whole 100m drums. We were glad we didn't have to foot the bill to replace them and the damaged existing cables.

 

[Deleted member 142255]

All of the above are the reasons trunking with conduit drops is the most appropriate way to install this.

 

[JohnW2]

I doubt anyone who runs wire/cale in tube would say anything different ... However in the case of so much spare capacity created by 3 2.5mm² singles on a 20mm tube I believe my comment holds up.

Maybe - as I said, I have very limited personal experience of using 20mm conduit.

I have the T Shirts.

Me too

 

[JohnW2]

All of the above are the reasons trunking with conduit drops is the most appropriate way to install this.

... or conduit with conduit drops?

 

[Deleted member 142255]

... or conduit with conduit drops?

Horizontal conduit runs with Tees would be a nightmare. Any future alteration would require all cables to be removed from the section of conduit.

In my 46 years in the trade I experienced the heartache. Believe me, trunking is the way to go.

 

[SUNRAY]

Horizontal conduit runs with Tees would be a nightmare. Any future alteration would require all cables to be removed from the section of conduit.

In my 46 years in the trade I experienced the heartache. Believe me, trunking is the way to go.

Although I agree wholeheartedly one has to consider what the wire lengths are and chances are of future alterations.
One brick structure (used to be a coal shed) 0.8 x 1.4m on the side of the outside toilet the same size I installed plastic conduit for light, switch and a socket which was pretty much only used for the lawnmower, the toilet only had a light, switch & FCU. Chances of further change? exceedingly low, length of wiring to be removed if required? way less than 2m. Difficulty of fitting trunking Vs difficulty of making alterations? let's say 5 Vs 1.

 

[Deleted member 142255]

Although I agree wholeheartedly one has to consider what the wire lengths are and chances are of future alterations.
One brick structure (used to be a coal shed) 0.8 x 1.4m on the side of the outside toilet the same size I installed plastic conduit for light, switch and a socket which was pretty much only used for the lawnmower, the toilet only had a light, switch & FCU. Chances of further change? exceedingly low, length of wiring to be removed if required? way less than 2m. Difficulty of fitting trunking Vs difficulty of making alterations? let's say 5 Vs 1.

Plastic trunking light as. Pulling in cables easy peasy, just the drops to worry about.

Conduit. Pulling cables in for inexperienced is flippimg hard work and risks burning them.

But hey, each to their own.

 

[mattylad]

How about buy a roll of T&E and a roll of G/Y. strip the 2 insulated conductors out of the T/E and run singles with the G/Y in the conduit?
OR get 25mm conduit?

I'd also get some cable lube

 

[AndyPRK]

Waits for someone to say the earth is too thin to be used as singles

 

[Harry Bloomfield]

How about buy a roll of T&E and a roll of G/Y. strip the 2 insulated conductors out of the T/E and run singles with the G/Y in the conduit?
OR get 25mm conduit?

Is the insulation spec, of the stripped cable, up to the same spec as singles?

 

[Deleted member 142255]

Although I agree wholeheartedly one has to consider what the wire lengths are and chances are of future alterations.
One brick structure (used to be a coal shed) 0.8 x 1.4m on the side of the outside toilet the same size I installed plastic conduit for light, switch and a socket which was pretty much only used for the lawnmower, the toilet only had a light, switch & FCU. Chances of further change? exceedingly low, length of wiring to be removed if required? way less than 2m. Difficulty of fitting trunking Vs difficulty of making alterations? let's say 5 Vs 1.

Oh yes, and he did say a domestic garage which is a little bigger than your dimensions and more likely to need modifying at some point. Lighting cables can also be put in the trunking saving further heatbreak trying to fit conduit all round,

 

[SUNRAY]

Oh yes, and he did say a domestic garage which is a little bigger than your dimensions and more likely to need modifying at some point. Lighting cables can also be put in the trunking saving further heatbreak trying to fit conduit all round,

Yes I know and incase you didn't realise your response was to my comment starting with this:

Although I agree wholeheartedly one has to consider what the wire lengths are and chances are of future alterations.

The example I gave was to highlight a situation where alteration was unlikely and length of wiring was so insignificant along with ease of removing it if such a situation were to arise. The complication of adding trunking (as it happens in that scenario it would have been a lot of additional work cutting appropriate holes through the shelving arrangements) , drilling it to take conduit adapters etc would have been crazy amounts of additional work for absolutely zero gain whatsoever. In a garage sized workshop my assessment could very likely be different.