PME Earth Impedance and RCT times - advice ;-)

[moose]

If you have the BGB on PART 2 DEFINITIONS it explains the meaning of Prospective Fault Current (Ipf), for those that dont here is what it says,

PFC the value of overcurrent at a given point in a circuit resulting from a fault of negligible impedence between live conductors having a difference of potential under normal operation conditions, or between a live conductor and an exposed-conductive-part.