What size your CPC

[spark 68]

Which regs you quoting?

oops my bad, lol, should be 543.1.1

Bloody IE 11 keeps missing characters out when I am typing, and I have to edit, I put the number edit in the wrong place, I will re-edit the earlier posts to correct

 

[Badged01]

Quoting regs will pull the chicks but even they sometimes check you're not bullsh*tting them :smile5:

 

[HandySparks]

The smallest size of a CPC if not an integral part of a cable is 2.5mm, I will look the reg up in a while.


edit: reg number 543.1.1, but there may be an exception see part (V) of that reg, there is a bit of a contradiction as below that it states that it shall be no less than 2.5mm if mechanically protected.

Typical bloody regs, lol

Surely 543.1.1 (v) allows the use of 1.5mm² cpc in PVC conduit (which is the case for the OP)?

Certainly for a lighting circuit.

 

[spark 68]

Surely 543.1.1 (v) allows the use of 1.5mm² cpc in PVC conduit (which is the case for the OP)?

Keep reading a bit further down lol

It contradicts itself

 

[HandySparks]

Keep reading a bit further down lol

It contradicts itself

Does it? If so, I can't see it.
Surely, you need to read the paragraph as a whole:

If the protective conductor:

(iii) is not an integral part of the cable, or

(iv) is not formed by conduit, ducting or trunking, or

(v) is not contained in an enclosure formed by a wiring system,

the cross-sectional area shall be not less than 2.5mm² copper equivalent if protection against mechanical damage is provided, and 4mm² copper equivalent if mechanical protection is not provided...


ie, if the cpc is in a cable, or in conduit or formed from metallic containment, the 2.5mm² minimum doesn't apply.

 

[spark 68]

I would say the opposite applies,

That 2.5mm is the minimum size, however on larger CSA live cables then a smaller csa CPC may be used to a minimum of 2.5mm subject to adiabatic etc. subject to the other conditions of that reg.

Besides the smallest size I stock is 2.5mm (smiley)

Agree about metallic containment btw.

Edit: that is what I meant about "typical bloody regs", it is either minimum 2.5mm with mechanical protection or it is contradictory by allowing a smaller size in containment (which is mechanical protection),lol

 

[Clive P]

Hi,
Wired a small workshop a while ago for a friend, did all the rings and lighting in 2.5 singles; one size no messing about with different sizes or running out of this or that.

Regards.

 

[MDJ]

The smallest size of a CPC if not an integral part of a cable is 2.5mm, I will look the reg up in a while.


edit: reg number 543.1.1, but there may be an exception see part (V) of that reg, there is a bit of a contradiction as below that it states that it shall be no less than 2.5mm if mechanically protected.

Typical bloody regs, lol

Why do they make 1.5mm2 Green and yellow then?

 

[Chr!s]

Why do they make 1.5mm2 Green and yellow then?

Because it will be enclosed within a wiring system.

Chris

 

[MDJ]

Because it will be enclosed within a wiring system.

Chris

but it will be when it is in conduit? thats the whole point, did you read the Post I quoted chris?