R1+R2 Values

[Luke1510]

Hi all,

Quick question when doing r1+r2 testing wether its a new install or a EICR, is there a table to show maximum readings we should be getting? Or is it a calculation?

Thanks in advance

Luke

 

[The Ghost]

Pg. 190 OSG.

 

[Andy78]

If it's a new install then maximum values of Zs and VD should have already been calculated.
On a periodic inspection your prime focus is on values for compliance with ADS.

 

[Richard Burns]

Appendix I OSG, Appendix B GN3
Those these are the theoretical values so expect a slight variation in practice, but they do give you a guide to likely values.
On an EICR it is unlikely you could get near to estimating the length of circuit installed.

 

[Pete999]

Pg. 190 OSG.

If my memory serves me correctly that table gives you the R/M or R1+R2/M for various conductor sizes including cpcs

 

[The Ghost]

Or you maybe able to use this?