Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2165
| Posted: 11:24pm 10 May 2026 |
Just on the subject of RCD (RCBO) tripping, I have RCBO on every circuit including Fridge, Freezers, Stove, all Workshop equipment etc. They never randomly trip with earth fault, unless the circuit has one of course, like moisture once in an outside power socket for one of the water pumps.
I occasionally test them with a "simulated person," a box containing two resistors, a 30mA or 50mA select switch, push test button, and an earth probe.
The simple "Inbuilt RCBO" test switch is OK, but it's not a real test of the circuit IMHO.
When the old analogue meters were upgraded 16 years ago for solar in-feed, the SEALED simple Digital meter and old analogue Off peak meter, along with the off peak analogue freq switch were all wired directly from street power via a Tag-sealed plug in Fuse link. So there are always a number of live TAG-SEALED cabling connections and cases in all Fuse boxes, as opposed to just the old almost hidden Active line from the street to the underside of the Main Fuse box power Breaker, this is now a Mains disconnect for the Individual Circuit Fuse and RCBOs only, with the exception of the off Peak HOT WATER, which is also always live, and quite often runs through the building to the HWS.
You can see a lot of heated debate in AU amongst electricians about this if you search for it.
Sorry for getting a bit off topic here
EDIT: The old RCD's were upgraded a few years back to quality RCBO, so maybe that's the reason I don't suffer from the nuisance tripping, which I've also read about and that Godoh mentioned.
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Edited 2026-05-12 10:46 by KeepIS