Crabtree C50 Breakers

[Onoff]

So as not to take the UVC thread off thread.....

 

This beast of a breaker is a Crabtree C50. "C50" was just the style, nothing to do with the amperage. This one is 5A.

 

 

 

Another oddity is that its a "Type 2", none of your Type B, C or D nonsense. They had different time/current curve characteristics. Here's a bit about them:

 

https://www.tlc-direct.co.uk/Book/3.6.4.htm

 

In an old college book somewhere I've an cutaway diagram of the insides of one of these exact units. Shows all the working parts and it's actually very good for showing how an mcb protects against both overload or a short circuit. You can pretty much "see" where the electricity goes.....tbh you could nigh on climb in!

 

Made In England!

[Nickfromwales]

5 hours ago, Onoff said:

 

Made In England

You need to replace that ASAP boyo . 

[Onoff]

A bit of an aside but if anyone is ever stuck for a like for like breaker for a consumer unit (other than asking around) then try these people:

 

http://www.reconelectrical.co.uk/reconditioned-circuit-breakers.html