High integrity earthing

[Deleted member 26818]

Yes the circuits do fail, they require a sheathed 2.5mm², or non-sheathed 4mm² conductor to be installed as a second CPC.
The combined value of 10mm², relates to the combined CSA of all the conductors (including live) of a multicore cable.
Yes you could have two separate 1.5mm² CPCs, if both are in conduit or trunking.

 

[Guest 004]

Thanks spin