Using Green/Yellow not as CPC

[mickys86]

For this type of work you should use a 3 core cable. In T&E the cross section of the earth isn't the same as the lives; so earth shouldn't be used as permanent live. Just my opinion.

Correct me if I'm wrong ( I'm just the apprentice)

But your saying that the only reason you wouldn't use the cpc in Twin cable is the fact it's a smaller CSA?

Nothing to do with it not being insulated then??

 

[pushrod]

Correct me if I'm wrong ( I'm just the apprentice)

But your saying that the only reason you wouldn't use the cpc in Twin cable is the fact it's a smaller CSA?

Nothing to do with it not being insulated then??

If it was being used in 2 way lighting the smaller csa could easily cope with the CCC needed - you would not do it for the other reasons not least that every cable should have its own cpc so leave it to what it was designed for and everyone expects it to be there for.

 

[Goody]

The twin earth comes with 2xinsulated 2.5 mm conductors and a 1.5 mm un-insulated conductor (CPC), all the three wrapped round by a PVC outer layer. In case of damage to the outer layer the CPC gets exposed and if it’s a live conductor the consequences will be serious.

Again 1.5 mm is capable of carrying lesser current than the 2.5 mm ones and when the circuit tries to draw more current than normal (because the fan got jammed or developed a fault), then the cable gets hot possibly resulting in a fire.

So as pushrod says, “leave it to what it was designed for and everyone expects it to be there for.”

Cheers!

 

[Knobhead]

The twin earth comes with 2xinsulated 2.5 mm conductors and a 1.5 mm un-insulated conductor (CPC), all the three wrapped round by a PVC outer layer. In case of damage to the outer layer the CPC gets exposed and if it’s a live conductor the consequences will be serious.

Again 1.5 mm is capable of carrying lesser current than the 2.5 mm ones and when the circuit tries to draw more current than normal (because the fan got jammed or developed a fault), then the cable gets hot possibly resulting in a fire.

So as pushrod says, “leave it to what it was designed for and everyone expects it to be there for.”

Cheers!

As usual this thread has gone off at a tangent.

I’m sorry but I thought we were talking about a 3 core flexible with a fully insulated CPC, not T+E.

 

[sparkinlee]

I’m sorry but I thought we were talking about a 3 core flexible with a fully insulated CPC, not T+E.

That was my original question... but no matter!

 

[Goody]

Correct me if I'm wrong ( I'm just the apprentice)

But your saying that the only reason you wouldn't use the cpc in Twin cable is the fact it's a smaller CSA?

Nothing to do with it not being insulated then??

I thought I was answering to "mickys86" post where he referred to "cpc in Twin cable".

 

[Knobhead]

This thread has gone off at a tangent (as per usual)

It started with a 3 core flexible with an insulated CPC core, somehow we now have T+E with an un-insulated CPC.

 

[mickys86]

If it was being used in 2 way lighting the smaller csa could easily cope with the CCC needed - you would not do it for the other reasons not least that every cable should have its own cpc so leave it to what it was designed for and everyone expects it to be there for.

I find it quite disturbing that someone would use the cpc in T+E for anything other than a cpc

Thinking now that I owe goody an 'apology' as it was his post #13 that I was refering to. It seemed like the only reason he was giving not to use the cpc is the CSA difference

 

[mickys86]

This thread has gone off at a tangent (as per usual)

It started with a 3 core flexible with an insulated CPC core, somehow we now have T+E with an un-insulated CPC.

That's kind of what happens with a flowing conversation the question was sorted ages ago. then it kind of moved onto other things

 

[pierva]

I all, I am new in this forum and I subscribed because I found this interesting thread which is very much related to my inquiry. I have read all the posts and sorry I might not catch all the abbreviations.
I hope I make it short... I built a stepper motor cable assembly by using an off-the shelves cable which has four power cores colored blue, black, brown, and Yellow-Green. My motor is powered by maximum 48 V so is by definition ULV (Ultra Low Voltage) category in Australian Electrical Standards. So, as first, it is not belonging to the "dangerous voltage" classification which is highly regulated for use of Yellow/Green core, I have decided to sleeve my G/Y core on both ends with plain colour (Red was my choice but could be a different plain colour selected anyway). I need the for cores for my two phases stepper motor to work properly and the four cores have same section. Additionally both cable ends are terminated by connectors and encapsulated in backshels.
Does my decision sound lawfully correct ?
Thanks for replies and sorry if my post is not at the right place.