Discuss TT earthing on a rewire in the UK Electrical Forum area at ElectriciansForums.net

Hi - that is very good and that's your number.
For rated time delay - it depends on which standard the RCD was made to. If you've got your OSG the info is in chapter 11, p112.
That reading obviously goes into 'measured Ze value' but does it to go in 'resistance to earth' box too?
 

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