BigTony
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We have electrical safety testing at work, I have to remember to empty my office before they turn up!
However, what the most common test actually does is check that the grounds/earths are all correctly routed - i.e. so if there was some failure of the components, then the unit would earth and trip the fuse/circuit breaker and make itself safe. The test in no way implies that the unit operation is safe, just that it will fail safely. In general the testers look for the safety certification on the PSU and as long as that has a cert. then they are happy to test and let you use the gear.
However, what the most common test actually does is check that the grounds/earths are all correctly routed - i.e. so if there was some failure of the components, then the unit would earth and trip the fuse/circuit breaker and make itself safe. The test in no way implies that the unit operation is safe, just that it will fail safely. In general the testers look for the safety certification on the PSU and as long as that has a cert. then they are happy to test and let you use the gear.