Can we use the armour of an SWA as the CPC???

[i=p/u]

when reading the table lenny posted , doest st mean strands and cu as ccc

 

[tony mc]

St is the actual steel armour csa

Cu is the copper equivalent csa

 

[i=p/u]

so 1.5mm phase conductor in swa has 15mm csa swa as cpc and 6.65 equivelent in copper.. if im on right track

 

[tony mc]

Yes you are and thats for 2 core swa.

 

[i=p/u]

good man, wont have to ask again, stuck

 

[mattd888]

I have a similar table that the niceic sent me. Another point is that although the armouring is suitable for the circuits cpc it would be important to remember that it my not satisfy the requirements for bonding of water pipes etc if the armoured was a sub feed. Rotting of the armouring can be an issue but that is why a periodic inspection is/should be carried out to catch such issues before it completly breaks down.

 

[BARK982]

The armour of swa should always be connected to earth and that's why you don't have to rcd protect a swa because if you damage it you will hit an earth before a live conductor, thats why you don't see a lot of two core swa about because people stopped buying it and just using the old yellow or new black as the earth. But the cross sectional area of the swa is larger than the earth conductor inside the cable, but why not connect both.

 

[johnny999]

This is the reason why we were taught at collage not to use it!!

 

[malcolmsanford]

This is the reason why we were taught at collage not to use it!!

You have been taught in a college never to consider using the armoured of a SWA as the CPC?

 

[Engineer54]

You have been taught in a college never to consider using the armoured of a SWA as the CPC?

The mind just has to boggle at some of these so called competent to teach Electrical lecturers these day's.