prospective fault current

[benpollard]

on electrical installation certificate at the top under supply characteristics it asks for
(next to single phase) a prospective fault current in KA
How do i measure this reading please?
Thanks!

 

[Sintra]

It's the highest reading between your PSCC & PEFC.


Sent from my iPhone using Tapatalk.

 

[tony mc]

Test between line and neutral (PSCC)and then line and earth (PEFC)and record the highest measurement with your meter on the correct setting.

If TNCS both should be the same.

 

[benpollard]

thanks tony/sintra

 

[ezzzekiel]

If TNCS both should be the same.

because the neutral/ earth share a common cable, the pfc should be lower than the max the protective device can handle.

 

[onmyway]

What setting should the megger be on for each test?

 

[telectrix]

PFC. Hi. ( you don't use no-trip for Ze and pfc at origin.). with your main switch OFF. and main earth disconnected from MET. remember this is a live test . the other way is to enquire the value os Ze ( good luck with your interminable lengthy phone calls ) and calculate the pfc.

 

[IQ Electrical]

Disconnect main earth for Ze but reconnect all earthing for PFC testing.

 

[telectrix]

my error, there . well spotted IQ. a bit slow today, got man flu, and a deficiency of alcohol.

 

[IQ Electrical]

my error, there . well spotted IQ. a bit slow today, got man flu, and a deficiency of alcohol.

Did me at Christmas, first proper flu I've ever had, took 2 weeks!