zappalot Posted November 22, 2016 Share Posted November 22, 2016 (edited) wanted to add to an elderly thread but could not. So here our breaker board, seems there is a test button, but no word about safe-t-cut, guess it is or was an import from somewhere and is 23 years old. If the test button works are we good to go? Edited November 22, 2016 by zappalot Link to comment Share on other sites More sharing options...
Crossy Posted November 22, 2016 Share Posted November 22, 2016 If it tests ok on the button then you'll be fine. Link to comment Share on other sites More sharing options...
Forkinhades Posted November 28, 2016 Share Posted November 28, 2016 Personally I would not trust the 'test button' alone. Something of that age should be tested properly with the correct meter. I have tested many of these of devices, both in the UK and elsewhere, and have had situations where the test button works, but during test with fault conditions applied, they fail to open. Link to comment Share on other sites More sharing options...
KhunBENQ Posted November 28, 2016 Share Posted November 28, 2016 On 22/11/2016 at 5:29 PM, zappalot said: but no word about safe-t-cut But very clear that is a RCBO as they are usually named. Cuts out power, ground fault, 30 ms break time. No way to get rid of the second (too small) upload EDIT by Crossy, fixed the images :) Link to comment Share on other sites More sharing options...
Crossy Posted November 28, 2016 Share Posted November 28, 2016 2 hours ago, Forkinhades said: Personally I would not trust the 'test button' alone. Something of that age should be tested properly with the correct meter. I have tested many of these of devices, both in the UK and elsewhere, and have had situations where the test button works, but during test with fault conditions applied, they fail to open. Agree Forky, but how many of us have the correct kit or know a local sparks with same? Link to comment Share on other sites More sharing options...
RichCor Posted November 28, 2016 Share Posted November 28, 2016 Shouldn't that trip with a simple light-bulb tester Live to Ground? ...unless you're looking to quasi re-certify the sensitivity is still accurate (to actually save a life). Link to comment Share on other sites More sharing options...
Crossy Posted November 28, 2016 Share Posted November 28, 2016 4 hours ago, RichCor said: Shouldn't that trip with a simple light-bulb tester Live to Ground? ...unless you're looking to quasi re-certify the sensitivity is still accurate (to actually save a life). A 15W (70mA) conventional lamp from live to ground should trip it on the 30mA setting. If you have no ground at the outlets then a large screwdriver in the lawn would do the trick, but keep everyone at a safe distance when doing any of this sort of test. Link to comment Share on other sites More sharing options...
Crossy Posted November 29, 2016 Share Posted November 29, 2016 27 minutes ago, Arjen said: And tthe other way around, when the test button not works, does that mean for sure the thing is not working? I have seen units where the Test button failed to operate the trip but it functioned just fine with the tester. But it's always safest to assume that if it doesn't trip on the button it's not going to trip when needed, replace! Link to comment Share on other sites More sharing options...
lopburi3 Posted November 29, 2016 Share Posted November 29, 2016 Test method used when I had Safe-t-cut first installed in 1978 was if installer survived you were good to go. Not recommended! Link to comment Share on other sites More sharing options...
RichCor Posted November 29, 2016 Share Posted November 29, 2016 3 hours ago, lopburi3 said: Test method used... That looks like a joke Crossy would pull, "Here, touch my finger" Link to comment Share on other sites More sharing options...
Forkinhades Posted November 29, 2016 Share Posted November 29, 2016 14 hours ago, Crossy said: A 15W (70mA) conventional lamp from live to ground should trip it on the 30mA setting. If you have no ground at the outlets then a large screwdriver in the lawn would do the trick, but keep everyone at a safe distance when doing any of this sort of test. This is the best you can do without specialist equipment. Link to comment Share on other sites More sharing options...
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