J
jasonmizen
hi guys! im doing testing in work with my boss in preperation for my am2. when i do insulation resistance test on my lighting circuit it comes back with a test result of greater than 500 megohms but when i reconnect the circuit into the mcb and earth and neutral into the terminals i then tested it again and had a reading of 179.3 megohms and the reading slowly went up to greater than 500 megohms!!!. when i asked my boss he said this reading is ok because it gets to 500 megohms any other better diagnosis? its on a new build house and i've taken all the equipment out that would interfere with testing eg lamps. any help is much appriceated.