cpc in pvc conduit?

[telectrix]

whether there's a cpc or not, damage could result in exposed live parts without ADS occuring, so what is the point of a cpc running alongside the L conductor? a an;t see any reg, breached whatewver.note in the comments sesction is all i'd put, just to show that i'd spotted it. c

 

[Cazmac1]

this was my initial point of view. I suppose you could argue that you are increasing the protection even though it may not actually work in practice. I have read through section 4 quickly but I just to tired to take it in. have a read when a bit fresher.

 

[Risteard]

If you believe that it is likely to suffer damage then perhaps pvc conduit is not the correct containment rather than wanting a cpc which is not required and would not afford any protection.

 

[davesparks]

If it doesn't work in practice then you aren't achieving anything.

If you are going to put this down as an observation requiring any action on an EICR then you need to be able to justify it in the regulations. There is no regulation requiring a cpc to be run alongside every conductor, only one that requires the cpc to be contained within the same wiring system.

 

[Cazmac1]

I can't see any breach of the Wiring Regulations unless it was to enter a ferrous enclosure on its own at some point.

It does enter the light fitting which is ferrous but as I said earlier all other points are earthed, so a short there would result in the protective device tripping.

 

[davesparks]

Then you have an eddy current issue

 

[Marvo]

Only if it entered the fitting through a different hole to the CPC and neutral.

I combed through my local SA regs just out of interest and there's also nothing that specifically forbids a single live insulated conductor in its own conduit unless you can class conduit as a sheath as well as containment.

 

[Deleted member 26818]

It's a requirement of the Regulations that all conductors (including the CPC) of a circuit a within the same ferrous magnetic containment (if used).
As this conductor is not within a ferrous magnetic containment it is not required to be within the same containment as any other circuit conductor.
No it does not require another CPC to be run with it either.

 

[davesparks]

It's a requirement of the Regulations that all conductors (including the CPC) of a circuit a within the same ferrous magnetic containment (if used)..

Which regulation is that?

 

[Deleted member 26818]

I'm in a Cafe.
I don't carry copies of the Regs around with me.
If I recall correctly, it's 521.5.2.

 

[Marvo]

I'm in a Cafe....

Hmmm, sounds like a place that might not have a liquor license. I suggest you might want to relocate pronto .

 

[Deleted member 26818]

Not sure if this is the exact wording:

Single-core cables armoured with steel wire or steel tape shall not be used for an a.c. circuit. The conductors of an a.c. circuit installed in a ferromagnetic enclosure shall be arranged so that all line conductors and the neutral conductor, if any, and the appropriate protective conductor are contained in the same enclosure.

Where such conductors enter a ferrous enclosure, they shall be arranged such that the conductors are only collectively surrounded by ferrous material.

It's not actually a Cafe, it's an Ice Cream Parlour.

 

[Guest55]

There is reg stating that a cpc has to be run to every point on a circuit.

but not to accompany every cable installed.......

 

[Guest55]

Going to fail that circuit

then you'd be making a mistake.......

 

[Cazmac1]

then you'd be making a mistake.......

Yes it would be, I've now changed my mind as it seems there is nothing that forbids this type of arrangement.
Thanks for all the replies.