2 module enclosure

[marcuswareham]

I am not sure if this is acceptable?

If I am using a 2 module enclosure for 2 MCBs both fed from a MCB in the main consumer unit. Would I have to use a busbar inside the 2 module enclosure or would it be ok to have a cable link at the bottom of the MCBs.

I have heard people say this is a nono inside a C/U, but my thinking in this example is that as long as the cable is rated high enough for the MCB from to C/U then there shouldn't be a problem as overcurrent protection is provided by the MCB feeding the 2 MCBs

Thanks Marcus

 

[telectrix]

you should have a D/P switch in that unit in order to isolate. therforei suggest you buy one of these. I f fed from RCD on main CU, replace the sub . RCD witha D/P switch.

https://www.NoLinkingToThis/p/british-general-5-module-3-way-populated-garage-consumer-unit/1926g

do it right

 

[marcuswareham]

you should have a D/P switch in that unit in order to isolate. therforei suggest you buy one of these. I f fed from RCD on main CU, replace the sub . RCD witha D/P switch.

https://www.NoLinkingToThis/p/british-general-5-module-3-way-populated-garage-consumer-unit/1926g

do it right

ah ok, so there is a requirement for double pole isolation, cool thanks

 

[marcuswareham]

So if it was a metal 2 module enclosure (like the wylex one available at Screwfix) and it was earthed is that then not alright. not sure there will be space for one of the BG garage c/u

 

[pc1966]

So if it was a metal 2 module enclosure (like the wylex one available at Screwfix) and it was earthed is that then not alright.

What is wrong with that? It should be earthed one way or another, either earth rod if TT or from the feed supply.

not sure there will be space for one of the BG garage c/u

How small is the garage?!

There will always be wall space, unless it is a doll's house!

 

[marcuswareham]

What is wrong with that? It should be earthed one way or another, either earth rod if TT or from the feed supply.


How small is the garage?!

There will always be wall space, unless it is a doll's house!

haha this aint for the garage, this is for a friend's house,

 

[pc1966]

So what is it for? Not enough slots in the CU?!

 

[marcuswareham]

So what is it for? Not enough slots in the CU?!

He has some underfloor heating in the kitchen of a kitchen-dinner, on its own B6 MCB he has added underfloor heating to the dinner part but its total load is just over 1500w so to much to add onto the B6 MCB. The cable for the kitchen underfloor heating is already in and very difficult to replace it is only 0.75 T&E so cant just swap the B6 MCB for a higher rating.

The consumer unit is full up, So a suggestion I said which might work, without ripping all of the plaster down. Was to swap the B6 for a B10 or B16 and then but an enclosure next to the C/U feed from the new MCB via new cable, then a B6 in the enclosure would protect the kitchen floor cable and a B10 for the dinner underfloor heating, on a thicker cable

 

[DPG]

0.75 T&E? .

 

[marcuswareham]

0.75 T&E? .

Ahh yeah, that's what he told me, only been told this stuff as I have not been round there due to the lock-down

But your question made me check and it seems 0.75 not available in T&E, maybe its flex or he has got it wrong and its 1mm, I will check with him