Building Control

[carl9254]

I get 6.525, so 10mm would be good, thanks for that so this equation is used to determine earth size from met to cu??

Ill do the job tomoz.

 

[Guest123]

You use to check that a CPC of any circuit complies.

 

[carl9254]

So the k reading would generally be 115?? Because housing cable is copper pvc 70 deg??

So if i wanted to work out this for my downstairs sockets circuit for example where would i stick my probes for the I reading??

 

[Guest123]

You wouldn't need to.

Fault current (I) = Uo/Zs So 230V/the Zs for that circuit = your fault current.