May 25, 200817 yr OK, so you've got one of these ground fault detectors. Feeling safe? Think again. Another TV member pointed me at this report, required reading Report_20V1_207_20_2_.pdf The crux of the matter is that these beasties, like any piece of mechanical gubbins, tend to seize if not regularly used. Operate that 'test' button regularly and be 4 times safer DO NOTE that this report is by no means an indication that a ground fault detector is not required. Just don't be lured into a false sense of security. "I don't want to know why you can't. I want to know how you can!"
May 26, 200817 yr RCDs should be tested at a minimum of 3 month intervals using the test button and every 2 years a time /current test should be carried out. This requires special instrumentation. An electrical installation must be free of the risk of fire or shock as far as is practicable. RCDs are not a substitute for safe electrical practice. Comply with Standards AS/NZ/IEC. All types of electrical equipment deteriorate over time, that is why routine testing is carried out. You might install 1000 RCDs in a large installation and test them, failure rate might be 1 in a 1000. Ater 2 years the failure rate might be 5 in a 1000 After 10 years the failure rate might increase to 10 in a 1000. When a faulty RCD is found it is replaced, tested and it will be in the next test. There is no disputing that RCDs save lives. This is why they are mandatory in Australia, NZ and many other countries.
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