Distribution circuit to Sub Main - Electricians Forum | Electrical Forum | An electrical forum for electricians in the UK

mercanlandy · 25-11-2007

Hi, I need to know what info I should enter on the periodic inspection report in regard to the distribution circuit. The form requests the size of the phase conductor and the cpc". The distribution circuit is a 4 core SWA and the armoring is used as the cpc. What should you enter as the CSA" of the cpc. The measured Ze at the sub main was 0.14 ohms.

All help appreciated.

regards

SC

EasyFox · 28-11-2007

Quote:

Originally Posted by mercanlandy

Hi, I need to know what info I should enter on the periodic inspection report in regard to the distribution circuit. The form requests the size of the phase conductor and the cpc". The distribution circuit is a 4 core SWA and the armoring is used as the cpc. What should you enter as the CSA" of the cpc. The measured Ze at the sub main was 0.14 ohms.

All help appreciated.

regards

SC

Might be helpful.
Swa armour csa's are listed.

http://uk.msnusers.com/SparkyHeaven/Documents/General%20Technical%20Information/SWA%20and%20Earthingby%20John%20Peckham%20version% 20Jul06.pdf

PS it's not my work the credit must go elsewhere.

Grae79 · 15-01-2008

ImageShack - Hosting :: swa5jx.gif handy

18-01-2008

I have seen PIR's where under CPC on a SWA circuit they have just written SWA.

To be honest if you use 2.5mm SWA (for example) then the CPC (armour) is always goona be pretty muchn the same