The spare breaker I put in has some electrical tape wrapped around it (by some previous owner I guess). The breaker does isolate the circuit when I press the botton, but I am a bit sceptical about its remaining life time.If your spare works why do you need another?
Maybe you should stop writing ones where that is inevitable?Why don't you read posts properly and not take the *iss?
Why bother to go back that far to cart back an MCB?You won't get a new one, unless you have a time machine and go back 40 years.
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