Hey all, going over some testing before my final assesment. i've heard a couple of times when testing a 3 phase supply using a single phase to earth test you double the reading as your Ze/Zs, so if you test L1-E=0.07 Zs=0.14. also what i have done until now is test all three Lines to earth and recorded the highest value, i heard from someone else they average the result, although i think every time ive tested they've been the same with maybe one line 0.01 higher.
Thanks.
Thanks.