Wylex ranges

[Ampo]

Wondering if someone can help, I have an old surplus of wylex/crabtree rcbos. They are identical in moulding. I wanted to use them up in my new extension rather than for a customer because the mix match branding on them. I've ordered a new wylex nm range db and although the sit perfectly on the bus bar the bottom dosent clip over the wide din rail. You could tighten to the bar perfectly but dosent seem right without clicking in. Is this a different dim rail? Can I just change for a standard din rail as it looks like it would work perfectly or do i need a different db? I dont really use wylex so I'm wondering if they changed there design. I cant see how any breaker would clip onto this. Any help appreciated

 

[westward10]

The DIN rail should be a standard size so if they don't fit they are not compatible with the enclosure.

 

[DPG]

A cobbled together consumer unit in a brand new extension sounds like a bad idea to me. Surely it won't add much to the overall build cost to buy a proper CU.

 

[snowhead]

DIN is a standard, the rail has only had a few variations over the tears and there's nothing that's so close that anything won't quite fit.
Either it fits or it's way off.

It's most likely a slight difference with the position of the bar re the terminal.
Is the bar fixed, have you tried fitting the RCBOs on the rail then fitting the Bar after?

 

[Ampo]

The DIN rail should be a standard size so if they don't fit they are not compatible with the enclosure.

That's the strange thing. The din rail is fine at the top but goes so far down below the bus bar I cant see how any form of breaker would do anything but secure itself by solely tightening onto the bar and not clipping to the bottom of the din rail
[automerge]1583486387[/automerge]

A cobbled together consumer unit in a brand new extension sounds like a bad idea to me. Surely it won't add much to the overall build cost to buy a proper CU.

These rcbos are about 25 quid a piece, they are brand new I have 12 which is what I need. The only difference between them is the print on the front, they come out the same factory so although I appreciate what your saying it's not really cobbled together. Would be just as cheap to buy a cheap lower quality brand fully loaded but I dont want these to go to waste. And although it would look funny in a customers house, it really dosent matter to me if it says crabtree on 10 and wylex on 2, they are identical so just a good opportunity for me to use them up

 

[DPG]

That's the strange thing. The din rail is fine at the top but goes so far down below the bus bar I cant see how any form of breaker would do anything but secure itself by solely tightening onto the bar and not clipping to the bottom of the din rail
[automerge]1583486387[/automerge]

These rcbos are about 25 quid a piece, they are brand new I have 12 which is what I need. The only difference between them is the print on the front, they come out the same factory so although I appreciate what your saying it's not really cobbled together. Would be just as cheap to buy a cheap lower quality brand fully loaded but I dont want these to go to waste. And although it would look funny in a customers house, it really dosent matter to me if it says crabtree on 10 and wylex on 2, they are identical so just a good opportunity for me to use them up

Fair enough. Assumed you had a box of random used stuff. Apologies.

 

[Ampo]

Fair enough. Assumed you had a box of random used stuff. Apologies.

No apologies needed, I get what it sounds like.
They fit perfectly into the bus bar and over the top of the rail but what I'm getting at is the bottom tab of the rcbo is useless and they just tighten up on the bar. I dont fit alot of wylex and although once the front is on it would be impossible for them to move I've just never come across an mcb or rcbo that dosent click in. I'll try and post a photo later if I can. It may just be there design but dosent seem right to me

 

[SJD]

Some makes of MCBs / RCBOs are fixed in position by tightening up onto the busbar, and not clip into the DIN rail, and sometimes with a manufacturer it varies according to the enclosure size. Possibly the busbar then needs to be a type that is fixed in position (e.g. plastic clip/bracket to chassis).

I have the impression this is more likely with older / smaller designs (though I might be wrong on that). I personally don't like this, and would try to avoid them, but I guess they must be OK.

 

[Ampo]

Some makes of MCBs / RCBOs are fixed in position by tightening up onto the busbar, and not clip into the DIN rail, and sometimes with a manufacturer it varies according to the enclosure size. Possibly the busbar then needs to be a type that is fixed in position (e.g. plastic clip/bracket to chassis).

I have the impression this is more likely with older / smaller designs (though I might be wrong on that). I personally don't like this, and would try to avoid them, but I guess they must be OK.

Ah thatales sense, the board is the newer nm range and I think the rcbos are older as I've had them a while. Now you mention it it wasnt a floating bus bar as it was already installed so I'm thinking you just ignore the clip and they have made them compatible

 

[westward10]

Have you tried them without the busbar in place.

 

[Ampo]

Have you tried them without the busbar in place.

No mate, the bar is fixed and they sit perfectly, just couldent get my head around the screw on the rcbo being the only thing holding it in place (obviously very secure with the front cover on) think I'm being blonde and over cautious maybe

 

[snowhead]

I've got an earlier Wylex NM range at home, that's got a floating Busbar.
The bottom clips do engage on the Dinrail.
I've seen other makes where you can't even get to the bottom clip or it's not fitted.

 

[Ampo]

I've got an earlier Wylex NM range at home, that's got a floating Busbar.
The bottom clips do engage on the Dinrail.
I've seen other makes where you can't even get to the bottom clip or it's not fitted.

Sounds like I've got nh rcbos and just need to ignore the clip to fit into nm enclosure
Cheers for all the help guys

 

[westward10]

Strictly speaking NH are not compatible with NM boards.

 

[littlespark]

It encourages mcb removal without isolation if you can just unscrew the bus bar terminal and lift the breaker out.