Short circuit disconnection times

[Pretty Mouth]

Yup. But I'm a saaad git with no women or friends who's quit drinking. This is what I do for 'fun' when I'm not sitting wondering where it all went wrong

 

[Pretty Mouth]

I guess I'm in good company though, it seems that I'm not the only one here

 

[Baddegg]

Quit drinking?....what’s that like then?

 

[Pretty Mouth]

For me, it's great. But I suspect it's not for everyone.

 

[Pretty Mouth]

The penny is beginning to drop I believe. Please jump in and correct me if any of my assumptions are wrong:

The disconnection times don't apply to short circuits because they don't need to - the danger is from burning up the cables, not from electrocution. Energy let through and thin conductors are more of a concern.

Minimum conductor size can be calculated for a given fault using the adiabatic, and manufacturer's data is best as it will allow the smallest conductor size. For MCBs and RCBOs, the let through energy increases with fault current.

Sound about right?