recorded cpc size

[pepparz]

look eng, see that, above me pic, it says respected.
read it and weep lol!!!

 

[telectrix]

so was harold shipman

 

[pepparz]

By whom? not by any grannies I bet!

 

[Engineer54]

look eng, see that, above me pic, it says respected.
read it and weep lol!!!

Me weep, Nah.

Just means you have 400 posts to your name. It has nothing to do with the content of those 400 posts...lol!!

 

[pepparz]

hook, line, sinker and copy of angling times. lol!!

 

[Engineer54]

hook, line, sinker and copy of angling times. lol!!

One day, if you're at all lucky.... You may actually Grow Up!! lol!!

 

[Hawkmoon]

If you have circuits run in metal trunking (with cpcs) you don't include the trunking when determining/recording the cpc size...

SWA sheath is no different if you are using a core as cpc

 

[Badged01]

If you have circuits run in metal trunking (with cpcs) you don't include the trunking when determining/recording the cpc size...

And the reg that tells you not to?

Not saying you have to include it in the CPC size above the cable conductor CPC size but there is nothing stopping you using it ...... reg 543.2.1

 

[Engineer54]

If you have circuits run in metal trunking (with cpcs) you don't include the trunking when determining/recording the cpc size...

SWA sheath is no different if you are using a core as cpc

Why would anyone be bloody daft enough to include a CPC in earthed trunking containment system?? lol!!

 

[Badged01]

Why would anyone be bloody daft enough to include a CPC in earthed trunking

Strangely enough I have come across a few cases in the past where the 'electrican' was taught on his course that as good practise you should run a seperate CPC to the conduit/trunking ...... new type "apprentice" electrician not a short course!

 

[Hawkmoon]

Why would anyone be bloody daft enough to include a CPC in earthed trunking
?? lol!!

I agree but if you're carrying out EICRs then you will come across it - there have been instances in the past (80s ish) where it has been required for installations in military establishments (if I remember correctly).

 

[pepparz]

Why would anyone be bloody daft enough to include a CPC in earthed trunking containment system?? lol!!

Is that right eng, u should include a cpc if only for good working practice. What happens if the trunking continuity fails! We'll all be buggered if we scrimp on safety. Lol!!!

 

[Hawkmoon]

Is that right eng, u should include a cpc if only for good working practice. What happens if the trunking continuity fails! We'll all be buggered if we scrimp on safety. Lol!!!

But you could say the same about cpc cables...

The benefit to using trunking as cpc is the very favourable R2 values you achieve, to add cable cpcs is just a waste of time, money and the world's resources - don't you care about the environment??

 

[pepparz]

Haven't got time to answer that, got to go to market to buy a pig.

 

[Engineer54]

And the reg that tells you not to?

Not saying you have to include it in the CPC size above the cable conductor CPC size but there is nothing stopping you using it ...... reg 543.2.1

If you are still arguing that you can combine a copper CPC and a steel CPC to make up the required minimum CSA you are WRONG!! Which ever one you do choose, it must be capable of taking the full fault current on it's own, not as a combined entity. A fault will always choose the easiest route to earth, so it will be the copper conductor (with superior conductivity) that will take the hit in a combined copper/steel arrangement!!