Breaking capacity of a 3871 breaker?

[Top Cat]

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?

 

[telectrix]

Operating current 30mA.


​should you not be entering the In of the 3871, not the RCD?

 

[telectrix]

if it's a type 1 BS3871, the max. Zs is 230/ 4In

 

[Top Cat]

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?

 

[telectrix]

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.

 

[Silly Sausage]

Here you go...

 

[Top Cat]

Thanks Archy, should have hidden the brown part of the book though! Naughty boy, should be green! Lol

 

[Silly Sausage]

What are these green books everyone's going on about?

 

[GLENNSPARK]

Untitled
theres some tables in here for MCBs type 1, 2 and 3....

 

[Top Cat]

Untitled
theres some tables in here for MCBs type 1, 2 and 3....

Hi Glen, used TLC a few times but did not know they did all this, thanks.

 

[i=p/u]

normally writting is printed on side of mcb. take one out thats what i had to do one time

 

[Top Cat]

normally writting is printed on side of mcb. take one out thats what i had to do one time

Yep, did that!:smile5:

 

[GLENNSPARK]

Hi Glen, used TLC a few times but did not know they did all this, thanks.

your welcome Topcat...