View the thread, titled "2391-10 advice please" which is posted in Electrician Courses : Electrical Quals on Electricians Forums.

I

ICE

Hi All


Call me thick and poke me in the eye, I know this but for some reason can not drag the answer from the depths of my BRAIN.


how do I determine the max Zs for a 300mA RCD ? (what is the calc)

Cheers in advance


Mr Thicky
:confused::confused::confused:
 
RA X I^n = >50 v touch voltage


50
----- = I^n
RA





50
---- = 0.3 so maximum will be 300mA
166


50
---- = RA
I^n


50
---- = 166
0.3


i think its something like this

someone please correct me if im wrong:cool:
 
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