A question for all the bright sparks, It you are busy doing an inspection report and find the earth loop impedance reading higher than it should be, what do you do?
I was told by the technical division of the Durban electricity department 2 very interesting points:
1/ That i am suppose to do an earth loop impedance test at each and every plug socket or power outlet, interesting because according to page 276...8.7.5 Earht loop impedance test should be done at the the main switch.
2/ If the reading is higher than it is suppose to be, for example 10 ohms at a 60 amp breaker, it is my responsibility to isolate the power imediately, report it to the electricity department and they will sort out the issue within the same day, funny they should say that because if i have switched off the power in the most recent test (15/11/2012) the power would still be off, i still havent had a reply from them todate. If i dont switch off the power i will be held responsible for any injuries caused by bad earth, surely the responsibilty would become theirs, if they dont attend to the problem within a 24 hour period?