Time to call it a day

[hightower]

In what situation is it the best solution? (Or even a good solution for that matter.)

Well I'd argue that it is well suited in the environment I was in today. An old club with voids all over the place. They don't want conduit/trunking running on the surface everywhere, and it would have been impossible to install conduit/trunking in the void as a retrofit. Being able to rod T+E in the voids allows for progress to be made.

 

[Risteard]

I have used it, if mechanical protected ie metal trunking etc, no problem. Easy to use in commercial refurbs .

So why wouldn't you use singles in a containment system like that mentioned?

Also the cpc size is often likely to be unsuitable for the fault levels encountered in non-domestic installations.

 

[Risteard]

Well I'd argue that it is well suited in the environment I was in today. An old club with voids all over the place. They don't want conduit/trunking running on the surface everywhere, and it would have been impossible to install conduit/trunking in the void as a retrofit. Being able to rod T+E in the voids allows for progress to be made.

Why not use something like Hi-Tuff then with the same csa (and insulated) cpc as the live conductors. I presume you have allowed for non-combustible supports for the wiring system and tried to prevent acrid smoke in escape routes?

 

[7029 dave]

So why wouldn't you use singles in a containment system like that mentioned?

Also the cpc size is often likely to be unsuitable for the fault levels encountered in non-domestic installations.

So why wouldn't you use singles in a containment system like that mentioned?


Simply because it was not a full containment system. Using voids in ceiling, and stud work.

 

[westward10]

So why wouldn't you use singles in a containment system like that mentioned?

Also the cpc size is often likely to be unsuitable for the fault levels encountered in non-domestic installations.

I have never read so much twaddle in all my life. Fault levels in commercial are often similar to domestic with the same type of circuit protection. What Standards do you refer to, give us some numbers.

 

[Risteard]

Fault levels in commercial are often similar to domestic with the same type of circuit protection.

And they are often much greater. If you look at the cable standards you will see that they are designed for domestic installations. You can claim that T&E in non-domestic installations is good practice all you want but it says more about you than me if you think that. It is frankly an abhorrent practice which only occurs because it is a cheap way of doing things - not because it is a good way.

 

[Ian1981]

And they are often much greater. If you look at the cable standards you will see that they are designed for domestic installations. You can claim that T&E in non-domestic installations is good practice all you want but it says more about you than me if you think that. It is frankly an abhorrent practice which only occurs because it is a cheap way of doing things - not because it is a good way.

An example would be dado trunking for a computer suite.
Where does it state and why not use twin and earth cables if seen fit.
Plenty of room in 100x 75mm trunking , capacity not exceeded to say you have to install singles is absurd

 

[Risteard]

An example would be dado trunking for a computer suite.
Where does it state and why not use twin and earth cables if seen fit.
Plenty of room in 100x 75mm trunking , capacity not exceeded to say you have to install singles is absurd

Trunking is designed for singles - not for T&E. And in Dado T&E is so inflexible as to be completely unsuitable.

 

[7029 dave]

Trunking is designed for singles - not for T&E. And in Dado T&E is so inflexible as to be completely unsuitable.

I agree on that.

 

[kingeri]

Trunking is designed for singles - not for T&E. And in Dado T&E is so inflexible as to be completely unsuitable.

Also there is no reference method B for t&e suggesting that it was not conceived originally that people would start putting it in conduit etc.