10 mm Sq cable used in a PMS system what code to be used on a ECIR form

built in the 80tys  has 10 mm sq  cable used as the main earth cable which is in good condition what code should be used C1. C2. C3 

  • PMS? Did you mean PME?

    10mm² as a earthing condutor might be OK - it all depends on the details of the situation - table 54.8 would be satisfied provided the PEN conductor is not larger than 35mm² so then you're looking at the adiabatic, PFC and fuse rating/type to decide if it's OK as a c.p.c.

       - Andy.