Mounting lightswitch into side of MDF cupboard - compliant?

[JohnW2]

Sliding a little back on-topic, can anyone tell/remind me what regs (if any) relate to situations in which there is nothing other than air between live conductors/terminals and potentially combustible materials? - e.g. a basic batten holder screwed to wood with no backplate or, indeed, an accessory mounted on a wooden pattress.

... and I'd still be interested in hearing any views.

However, I've realised that this leads on to a wider question, in which combustible material is not an issue. What would people (and the regs) feel about plate accessories screwed directly to plasterboard-clad stud walls, without any backbox of any sort? I got to wondering that when, in relation to the wardrobe issue, I was thinking that, if there were a double wall (with a void in between) to the wardrobe, then a backbox of any sort might not be necessary.

Kind Regards, John.

 

[333rocky333]

reg 526.5 says about enclosures formed from building materials is ok, if said material is non combustible when tested to BS 476-4

 

[JohnW2]

reg 526.5 says about enclosures formed from building materials is ok, if said material is non combustible when tested to BS 476-4

Ah, thanks - I thought it was there somewhere!

In that case, what I saw in the hotel, with part of the 'sandwich' of the 'enclosure' (faceplate-wardrobe wall-pattress box) being MDF/chipboard/whatever would presumably not be compliant with 526.5 - since I presume that those materials would not be non-combustible per BS 476-4?

The same, I presume, would also be true of the 'faceplate screwed to plasterboard' scenario I mentioned, since some of the extremities of the 'enclosure' formed within the stud wall would be timber?

Kind Regards, John.