- Reaction score
- 56
r1 + r2 is also measured for initial verification. Ze + (r1 +r2) is approximately equal to the expected Zs. Ensures that the circuit is safe to energise before "live" Zs reading is taken. Apparantly is acceptable to calculate r1 + r2 from Zs-Ze when carrying out future testing (advice from NICEIC) sounds a bit wrong to me !