It is a problem with breakers. DIN terminals are prone too, but a bit of a tug with long nose pliers can identify the odd duff connection when suppliers provide cabinets with too little room to connect to the DIN rails.
I suppose One would need a pair of substantial mole grips along with rubber gloves and wellies for a distribution board waggle test :-)
If some of the screwdriverless contacts appearing on terminals are seen as the answer, I would prefer the problem :-)
AB
I spotted this
Why not just make MCBs that cannot allow this to happen?
Third MCB from the right, the terminal on the very right is the RCD.
I know, it's very annoying.
I've never (knowingly) left an MCB in that condition but it has sometimes taken a couple of goes to get the busbar into all the MCBs right.
Owain
I was conscious of that... I opened mine right out first.
I *think* Hager might have a shield strip that makes this less likely but I'd have to find a spare one and have a look.
Insulated dentists mirrors are handy to have in your toolkit :)
Mine isn't insulated so I'm a bit more careful poking around with it. I've already lost one good pair of cutters to the cable fireworks syndrome.
Owain
TBH I first spotted it by looking at the front position of the MCB. It just did not sit square with the other MCBs.
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