Crabtree MCB compatability

[sparkydude]

Hi all, i ned to change 2 MCBs in an old style crabtree board, the breakers are marked as b32 so not very very old, but also have bs3871/en60898 on the side of them , they are called starbreaker and have the busbar stub on the back of the breaker. Are the newer starbreaker MCBs compatible with these older ones, and will they fit like for like?

Or does anyone have a couple of the older ones with the grey switch on them in a B20A rating they are willing to sell ?

Nick

 

[JohnD]

the ones with the tongue on the back are the modern ones.

 

[sparkydude]

the one i have with a tongue on the back looks like an old sb6000 range , withouth the lowetr terminal obviously , but the newer ones look like normal standard mcbs of now , the switch goes all the way across the front of the module, whereas the older crabtree ones just had a grey switch in the middle of the mcb.
Nick

 

[Lectrician]

Nope - All the crabtrees in the wholesalers have a busbar.

 

[Lectrician]

I have some B16's for sure with a stub on the back - maybe have some B20's. Can look on Tuesday.

 

[RF Lighting]

can you have a look on www.thefusecompany.co.uk and give us a link to the style of MCB you are after?

 

[JohnD]

surely there's a part no on the front?

might begin 61 or 610?

 

[sparkydude]

there is nothing on thefusecompany, Here is a link to the ones I want

http://cgi.ebay.co.uk/Crabtree-Star...ryZ26215QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

and these are the more common ones to find

http://cgi.ebay.co.uk/CRABTREE-STAR...eZWD1VQQtrksidZp1638.m118.l1247QQcmdZViewItem

There is no number on the front of the old one john or else i would have told you, apart from the B32 part there is nothing


So i just need to know if the 2 styles are interchangeable or not.

Nick

 

[JohnD]

can you post a pic?

the ones with the p/n beginning 61 are definitely starbreaker ones, but Crabtree also make Polestar and something else (forget the name) and on older versions, they semed to fit each other (I formerly had some older Crabtree RCDs not marked with range name and couldn't identify the range by examination, measurement or trial fitting as they all seemed the same).

If you can post a pic of your CU it may help

Or (the price is OK) you could just buy the Ebay ones.