I have a (UK domestic, private house) Merlin Gerin consumer unit with Multi9 C45N circuit breakers and I want to replace one of them. When I look for replacements, all the similar ones for sale (ebay mainly since this range appears to be discontinued) seem to be labelled "Type 2" whereas the (really old) existing ones don't say type anything. What does Type 2 mean? I've looked at the wiki and it talks only about a Type ABC classification.
(In case someone wants to say, why do you want to do that? I have a circuit which trips the main switch about once every 3 months. If everything is disconnected from it, it still won't come back up. Leave it for a day or so and then it will. Every socket has been removed, carefully inspected and replaced. So that seems to narrow it down to an intermittent fault in one of the ring main cables and one in the breaker. It seems sensible to try replacing the breaker before embarking on a more exhaustive search to find the fault elsewhere).
(In case someone wants to say, why do you want to do that? I have a circuit which trips the main switch about once every 3 months. If everything is disconnected from it, it still won't come back up. Leave it for a day or so and then it will. Every socket has been removed, carefully inspected and replaced. So that seems to narrow it down to an intermittent fault in one of the ring main cables and one in the breaker. It seems sensible to try replacing the breaker before embarking on a more exhaustive search to find the fault elsewhere).