Zs values?

[Geoffsd]

max Zs= U0/Ia (x0.8) only works for B C D mcbs 60898 rcbos 61009. (table 41.3) makes life easier to work out max zs without looking it up... fuses i look up. ;-)

Jud - you are strictly correct but post #75 was in reply to another post and I, at least, think it quite obvious that he is referring to his discovery/realisation that the 5, 10, 20 only works with 60898s.

Also, as you can see he does refer to 'without looking it up' or as I put it 'needing the graphs'.

I just got the impression that you were 'raining on his parade' when he wasn't really wrong if read in conjunction with his previous post.


Edit -substituted I for you

 

[JUD]

Jud - you are strictly correct but post #75 was in reply to another post and I, at least, think it quite obvious that he is referring to his discovery/realisation that the 5, 10, 20 only works with 60898s.

Also, as you can see he does refer to 'without looking it up' or as I put it 'needing the graphs'.

I just got the impression that you were 'raining on his parade' when he wasn't really wrong if read in conjunction with his previous post.


Edit -substituted I for you

I didn't intend to rain on his parade. His previous post regarding 60898 and 61009 breakers was bang on the money.

I was replying soley to post #75, which is why I quoted it. SimpleSimon asked if the formula also applied to BS 88 fuses, to which Smiffy replied...

max Zs= U0/Ia (x0.8) only works for B C D mcbs 60898 rcbos 61009. (table 41.3) makes life easier to work out max zs without looking it up... fuses i look up. ;-)

 

[Geoffsd]

As I said - "you are strictly correct".

t f b. :seeya:

 

[Dan]

Just bumping some threads in the Electrical Wiring Theories and Regulations forum category here on our Electricians Forums. If this specific topic isn't current, just ignore it, it'll drop off the list in no time. However, if it's something you'd like to contribute to, feel free to reply and bring it back into current discussion.