Got a Wylex NN board installed in April 1990, at some point a bigger shower (Bristan Cheer 8.5kW) has been installed leaving the original NB30 Type 2 as a spare with an NB40 breaker being installed to run the larger shower.
The NB40 breaker keeps tripping, have established the breaker is the issue as trips at a lower level than it should (the shower is the correct size for an NB40 breaker).
As we know, these are obsolete, so eBay will need to be scoured for a replacement as no one else has any stock, tried TLC and the usual obsolete breaker sellers online. Is this a good idea, any idea how to ensure the breaker bought is OK?
Secondly the NB40 breaker is I think from a similar kind of source as the Type has rubbed off (see picture). What Type do I need to source to replace? Type 1 or Type 2?
The NB40 breaker keeps tripping, have established the breaker is the issue as trips at a lower level than it should (the shower is the correct size for an NB40 breaker).
As we know, these are obsolete, so eBay will need to be scoured for a replacement as no one else has any stock, tried TLC and the usual obsolete breaker sellers online. Is this a good idea, any idea how to ensure the breaker bought is OK?
Secondly the NB40 breaker is I think from a similar kind of source as the Type has rubbed off (see picture). What Type do I need to source to replace? Type 1 or Type 2?