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Indeed it is. I do say in my first post on the subject 'If the braid is an exposed conductive part'Whether it is an exposed conductive part is debatable.
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I'm not, I wouldn't know how to. I imagine there will be substantial thermal stress and damage with a fault to earth. There is on everything else.As a matter of interest how are you assessing the braids ability to carry fault current whilst suffering no thermal stress.
What I'm saying is that if the braid is an exposed conductive part then a fault would need to disconnect the supply in .4 sec. assuming a TN supply.