I can’t get my Iz greater than In

Hi all, this is driving me mental, if I have a Ca of 1.03 (25degrees ambient) & a In of 6A or any number you like then Iz will never come out greater than In unless I add another grouping factor just to make it work, which shouldn’t be necessary.

There has to be an explanation to this but I can’t figure out how to make it work.

Please help

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