Help with tt system certification

[Simon81]

HiCan anyone help me with regards to filling in a niceic part p cert with regards to the part were it concerns tt.This is on page 2 I need help with the parts electrode resistance ra , is this the measured ze result I have taken ?And also method of measurement ? Also what is the maximum ze for a tt system , I no it's 0.35 for tncs and 0.80 for tns. Any help is appreciated Thanks

 

[Guest123]

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