Differnet makes of CU and MCB

[Rockingit]

OK, then...now begs the question when is a DB not a DB? If I take an adaptable box with a DIN rail, and a nice cover (Lewden do some lovely ones)....insert 4 x MK MCB's, an RCD and an Isolator switch.....absolutely nothing wrong with that as far as I can see..... do I have an MK board or a Rockingit board???

FFS - it's a plastic moulding that's being argued over, surely??

 

[richy3333]

OK, then...now begs the question when is a DB not a DB? If I take an adaptable box with a DIN rail, and a nice cover (Lewden do some lovely ones)....insert 4 x MK MCB's, an RCD and an Isolator switch.....absolutely nothing wrong with that as far as I can see..... do I have an MK board or a Rockingit board???

FFS - it's a plastic moulding that's being argued over, surely??

In your example the breakers are all the same make. I think it is mixing the makes that causes the contention? Hager instructions say that only products from their catalogue should be installed.

 

[Rockingit]

In your example the breakers are all the same make. I think it is mixing the makes that causes the contention? Hager instructions say that only products from their catalogue should be installed.

OK then, throw in a couple of Hager MCB's into my box above, NOW who's is it???

 

[Rockingit]

My point here is what exactly is being type tested? All a CU is, is a plastic box pre-filled with things you order off the shelf. So, if I take my lewden box and fill it as per a conventional split board with whatever old leftovers I have in the back of the van, and it subsequently goes wrong and catches fire, am I going to point the finger at Lewden or am I going to point it at whichever MCB type it was that caught fire?

 

[MDJ]

Talking of lewden DBs, I likey, cheap and cheerful but plenty of room :42:

 

[SirKit Breaker]

Is it just me who doesn't really see theis as an issue, as long as they fit right?

There is no issue that i can see. If the MCB physically fits onto the busbar properly, and it has the appropriate BS number, then it complies with the regs etc irrespective of who's name is on it, end of.

Cheers...........Howard

 

[richy3333]

OK then, throw in a couple of Hager MCB's into my box above, NOW who's is it???

Frankenstein's?

 

[richy3333]

There is no issue that i can see. If the MCB physically fits onto the busbar properly, and it has the appropriate BS number, then it complies with the regs etc irrespective of who's name is on it, end of.

Cheers...........Howard

Apart from the fact that manufacturers guidelines trump the 'Regs'?

 

[Engineer54]

Apart from the fact that manufacturers guidelines trump the 'Regs'?

Even there, you need to use a bit of commonsense, i can think of a few manufactures instructions, that can be taken with a pinch of salt!! Cooker appliances being one of them!!

 

[SYKRAPS]

If it was such a problem all manufacturers of MCB's and DB's should be made to have different design criteria with no way of interchanging. Tenby and Legrand DB's were identical with different labeling and obviously made side by side in the same factory so surely no issue to interchange.

I must admit though I always fit matching MCB's because I feel better doing so.

 

[SYKRAPS]

If thre was such a problem with mixing MCB's in a consumer unit why would certain manufacturers provide retro-fit kits allowing you to mix type 2 MCB's and type B MCB's that obviously have different characteristics?