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hi thanks everyone for your comments.. i see it now, i think i was over complicating everything in my head too much... yeah i have done a fair bit on Zs, i have actually covered everything i asked about but in a different context and not within design..and when i see it on one of my papers i...

Hi Thanks again, i presume the reason for measuring the pfc at design stage is to make sure its suitable to carry the fault current with the new loads that are being installed and to make sure the main protactive conductor has a suitable csa for the job.. the value of external impedance is...

Hi could someone please tell me why i need the following information, relating to the characteristics of the supply during the design stages of an installation?? prospective earth fault current the value of external impedance new assumed current demand of the installation disconnection time...