MK 30A 3pole MCB BS3871

[asdf]

Hi,

I have got one job where I have to upgrade MK 20A 3 pole MCB BS3871 to 30A. The consumer unit is very old and no one selling this MCBs anymore. I have tried to ask some salvage sellers, but received "suggestions" like to install 3x single pole MCBs instead one 3 pole. I know it`s not safe. What is the best way in this situation? And not very expensive?

The actaul MCB looks like this:
MK LN 20 AMP TYPE 3 M6 415V TRIPLE 3 POLE MCB CIRCUIT BREAKER LN8820 BS 3871 | eBay

Regards

 

[Richard Burns]

I would suggest that you either buy the one specified on your link or look at changing the board to a more modern version, usually an unlikely scenario.
You could try contacting The Fuse Company, they say they can get any breaker, though I do not know if this is true.

 

[asdf]

Thank you, I have send them request.

 

[Deleted member 26818]

Why does it have to be a BS 3871 device, why can't it be a BS EN 60898 device?

 

[needasparks]

The LN range was taken by siemens many years ago so you may have better luck searching for that one.

 

[asdf]

Why does it have to be a BS 3871 device, why can't it be a BS EN 60898 device?

It doesn't fit to the board.

 

[asdf]

The LN range was taken by siemens many years ago so you may have better luck searching for that one.

I know that I can use Siemens, but looks like it's even more difficult to find Siemens than MK one.

 

[telectrix]

will this do?
MK TYPE 2 3 POLE 32 AMP CIRCUIT BREAKER RARE | eBay

 

[asdf]

will this do?
MK TYPE 2 3 POLE 32 AMP CIRCUIT BREAKER RARE | eBay

Yes, I already find it.
Thanks anyway!

 

[needasparks]

I know that I can use Siemens, but looks like it's even more difficult to find Siemens than MK one.

Most wholesalers should be able to order one.

 

[asdf]

Most wholesalers should be able to order one.

the problem is - they are obsolete now....