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Anyone know what the kA of this breaker is? Also on same board i had a 30mA RCD main switch that had a BS number of 4293. Can't find that number should i just put down 61008?
 
4293 is the BS number for older type RCDs...replaced with BSEN61008....the max times are different....look in GN3 (p) 53 for rated short circuit capacity of MCBs to BS3871
 
pt1 may mean type 1, equiv. to type B in 60898.
 
I will put down 3kA, got to do something or this report will never get done!
 
Started to put details in computer package:- Cooker-type of wiring A - Ref method 100 - Points served 1 - Live 6.0mm E 2.5mm - Max dis time 0.4 - BS No 3871 - Type (automatically comes up N/A) - Breaking capacity 3
Operating current 30mA. Now at this point it should automatically work out the Max Zs. But no it comes up as "Invalid combination"!!!!!!!!!

Now have i done anything wrong or should i bypass this and put in my own figure, trouble is i can't find Zs for 3871 breakers (tables) in BGB
 
Operating current 30mA.


​should you not be entering the In of the 3871, not the RCD?
 
if it's a type 1 BS3871, the max. Zs is 230/ 4In
 
Getting confused now! The heading is RCD operating current I(triangle)n

Can't find table in BGB, Where did you get that info Tel?
 
deep in the recesses of what pretends to be a brain. as a type B 60898 is 5In, type C is 10In, the 3871's type 1 is 4In, type2 is 7In. can't remember the rest.
 

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