max zs of large fuses

[peterhardacher]

BS7671 tables only go to certain size fuses eg how can I find max ZS of 400 amp BS88 - 2 on niceic test sheets they ask for a max value out of regs table I have only managed to find a busman fuse chart which differs been told by employer to use these values on sheets any input would help thanks

 

[Octopus]

Its best not to duplicate threads on here!

 

[peterhardacher]

Well the reasoning was this is more of a heavey industrial qwestion so I put it in both forums as I see a lot of the testing qwestion ansures are house s mostly :/