psc

[bonjovi]

just read a post forgive me for not being the best spark in the world and have sat my 2391 awaiting results but being on the vodka and not got my brb handy well lets say cant be arsed to look as ive had a few but if you read the post in new threads .
you will see what im talking about this guy has a psc of more than 10 k (most 60898 fuses only go upto 10 )
waffeling
whats the difference inj prospective short than prospective fault as ive forgot
so excuse the ignorance as i dont use the knowledge just had to revise to get the cert would have known in dec but if i didnt want to remember i wouldnt be a good spark adi

 

[Paul_Rawlinson]

PSCC - Prospective short circuit current. maximum current than can flow in the even of a short circuit fault i.e Line - Neutral, Or, Line - Line

PEFC - Prospective Earth Fault current - Maximum current that can flow in the event of a fault to earth.

You record the highest of the 2, however on a 3phase system you record double the L-N value (Unless you tester is capable of measuring L-L)

Its very unusually to have a PFC that high unless you'r in an industrial unit right next to the substation. what is your Ze value??

 

[bonjovi]

paul thanks for the reply but read new thread to understand i have heard of a lot higher reading but thats only when the supply earth is broken or u.s