Electrics

[DavidC]

Dear Expert

I am trying to calculate how to work out the cross sectional area of steel wire armoured cables when being used as a circuit protective conductor (CPC).

The formula is indicated in the IEE wiring regulations, BS7671 i.e.


S= Sq Root (Isquared * t) / k

Also how do I know if this is enough for a cpc.

 

[Damocles]

Well there you have it then. If you understand what each of those letters stands for, then you are well away. I don't. suggestions?

 

[mackeral]

david,

try asearch on this forum. I THINK someone had posted a link to help with such matters.

 

[ban-all-sheds]

A joint Lectrician-BAS production:

//www.diynot.com/forums/viewtopic.php?p=61684#61684

 

[Lectrician]

LOL - Thats an excellent table for use when doing PIR's - Thats why I have a copy