thanks Andyc
common case of speed reading going on there lol
the fluke if set to the right conditions will do a 2 lead test and it makes Zs testing so much faster which when testing lots of lights or skts can save lots of time.
and i think the megger has a lead connector which joins the e-n...
well guys you can always bypass the dimmer with a little link wire then do zs and if you are not on an rcd cct why do you use 3 leads just use 2 zs is earth fault loop remember so go earth to live and test it will be a faster test and saves having 3 hands lol