Cable Type

[andydj99]

Hi all

Does anyone know what type of cable is used in the picture

it was installed in the 70s with 2.5mm singles and a 1mm earth encased in a solid plastic capping.

anyone know seen this before

i could do with knowing what cable type for the condition report

Thanks

 

[KAS1]

Sorry, what you saying here, is the black sheath the plastic capping ?

 

[andydj99]

All the information i have about this cable is they installed it from the drum. The protection is the thick plastic sheath.

Just wondered if anyone had seen or used this before

 

[rocker]

Could be CTS (cab tyre sheath) is the sheath very tough?

 

[Outspoken]

When i was an apprentice in East London we did a lot of work on Council estates made of pre-formed concrete sections (Tower blocks and low rise types) and many had been pre-wired in a cable that looked very similar to this, they ran it in the voids in sections and preformed channels. The cable was , by the standard of the day, fire rated in a minor way as the outer sheath was fire retardant and the inner heat resistant, this was compared to the standard PVC/PVC T&E that was available at the time. This seemed to be used where Pyro would be too expensive or unnecessary but they wanted a higher rating of cable.

Obviously this cable looks like that cable I saw back then, but that does not mean it is, there was also an unarmoured "Tough" cable for external use, a bit like HO cable today, so your guess is as good as mine. Sorry cannot be more help.

Any of the older Guys got any clues?

 

[MDJ]

One of two types IMO, either old fashioned high tough or single cables in a flat plastic pipe with ferrels on the ends of the singles where it leaves the conduit, the bare CPC suggests a high tough though, never seen that actual cable myself and I thought I had seen them all TBH.

 

[Engineer54]

A new one on me too, though Outspokens post does ring a distant bell. Those early fast build precast constructions had many seemingly, one off wiring systems, that are never seen again...

 

[somersetsparks]

We used to call it pre-wired conduit, I have never installed it but its in lots of council properties from the 70's round our way, as far as reference methods/ccc's are concerned, it counts as singles in conduit I believe.

 

[tazz]

Old swg gauge cable, youll find its stranded not solid. The reason its in plastic conduit, we had problems in the 70s with acidic lime in the plaster, and pvc cable was a new thing. Depending on how its been installed, would pull new T&E or singles using same tube if ok with regs

 

[onions1066]

I'm pretty sure it's called modular wiring system, I've worked on a few old installations with it. It's mmmmmmmmmm nice to work with.

 

[tazz]

Search and found it old pvc 7/0.029 singles...made up of 7 strands of 0.029" remember all the manuafactures stating it will need to be replaced every 10 years.....most of it is still installed and working ok today...lol

 

[onions1066]

Search and found it old pvc 7/0.029 singles...made up of 7 strands of 0.029" remember all the manuafactures stating it will need to be replaced every 10 years.....most of it is still installed and working ok today...lol

still going strong until you try screwing down on it. snaps so easily. Normally about3 of the 7 strands left when you've finished with it. Lol

 

[tazz]

And the sparks cutting strands off, so they could spur off ring main socket terminals....alot to be said for modern regs

 

[rattlehead85]

I have come across this quite a lot during my time working on council blocks and stock housing. It was commonly known as PVC Toughlex Insulated wiring although to this day i am unsure wether this was accurate. The line and neutral conductors could be pulled out of the black sheathing although the cpc was pre-formed within it. Still in service in many a block with no signs of adverse conditions unless tampered with or subjected to prolonged overloading.
I have seen cases where the line and neutral have been pulled through and replaced with new cable colours although i am not sure this could be classed as an acceptable wiring method to BS7671 as it is not conduit in the true sense of the word.

 

[Engineer54]

Search and found it old pvc 7/0.029 singles...made up of 7 strands of 0.029" remember all the manuafactures stating it will need to be replaced every 10 years.....most of it is still installed and working ok today...lol

The older 7/029 as well as the other imperial sizes were and still are far superior than the present single solid core conductors of today!! No-way would the manufacturers have ever stated that these PVC cables need to be replaced every 10 years!! That would have been it's death bell right there and then!! lol!!