- Joined
- 27 Jan 2008
- Messages
- 23,669
- Reaction score
- 2,667
- Location
- Llanfair Caereinion, Nr Welshpool
- Country
Seems an odd question but it's all to do with safe zones and do safe zones extend around a corner or bend?
My kitchen was extended but the extension wall is not directly in line with the original wall there is a dog leg and pillar.
The whole job was done under the watchful eye of building control while I was working abroad and the inspector allowed a horizontal wire from one light switch to the other.
Since in the extension the ceiling slopes also the safe zone would have sloped and normally cables run horizontal or vertical not following the ceiling slope.
I only have BS7671:2008 not the amendment and the bit which I look at is:-
However there is nothing to stop my building of a single room round house and with a thatched roof one would then consider it as all being one wall.
I have never understood why we have 150 mm from the top but not from the bottom as often we have a architrave, frieze or cornice which means the 150 mm from the top is unusable and clearly we would not want to route cables through highly inflammable thatch.
If I was to fit dado trunking around the room clearly I an run the wires in that trunking. Or can I? If I made the trunking myself from skirting then likely one would say you can't run your cables behind that but buy the trunking ready made and it's OK.
The trunking shown when new is easy identified as trunking but a few coats of paint and it's no different to using home made trunking made from formed wood like this.
clearly no one would want to drill or otherwise penetrate varnished wood held on with brass screws so it would be no different than using the plastic commercial version other than looking better.
Once we fit a socket in the commercial trunking then horizontal rules apply but use a riser to get to the 350 mm then we must question if we can actually use even the commercial trunking. The picture shows it going around three flat surfaces so the question is if we can do it with commercial trunking then why not with any other system the plastic hardly stops anyone drilling the trunking.
Once we accept that the dog leg shown is OK then we have to question at what point if any it's no longer permitted.
Personally I would not have wired my light switch horizontal it would have gone into the ceiling space then back down the wall at the position of the other switch. Although we have the 150 mm at the top personally I have never used it although with a flat with concrete roof maybe there is no option.
I have not tried but with the commercial dado trunking I am sure I could remove the lid without a tool but with brass screws holding standard skirting I could not.
My kitchen was extended but the extension wall is not directly in line with the original wall there is a dog leg and pillar.
The whole job was done under the watchful eye of building control while I was working abroad and the inspector allowed a horizontal wire from one light switch to the other.
Since in the extension the ceiling slopes also the safe zone would have sloped and normally cables run horizontal or vertical not following the ceiling slope.
I only have BS7671:2008 not the amendment and the bit which I look at is:-
This seems to suggest the kitchen has a collection of walls rather than one wall.
However there is nothing to stop my building of a single room round house and with a thatched roof one would then consider it as all being one wall.
I have never understood why we have 150 mm from the top but not from the bottom as often we have a architrave, frieze or cornice which means the 150 mm from the top is unusable and clearly we would not want to route cables through highly inflammable thatch.
If I was to fit dado trunking around the room clearly I an run the wires in that trunking. Or can I? If I made the trunking myself from skirting then likely one would say you can't run your cables behind that but buy the trunking ready made and it's OK.
Once we fit a socket in the commercial trunking then horizontal rules apply but use a riser to get to the 350 mm then we must question if we can actually use even the commercial trunking. The picture shows it going around three flat surfaces so the question is if we can do it with commercial trunking then why not with any other system the plastic hardly stops anyone drilling the trunking.
Once we accept that the dog leg shown is OK then we have to question at what point if any it's no longer permitted.
Personally I would not have wired my light switch horizontal it would have gone into the ceiling space then back down the wall at the position of the other switch. Although we have the 150 mm at the top personally I have never used it although with a flat with concrete roof maybe there is no option.
I have not tried but with the commercial dado trunking I am sure I could remove the lid without a tool but with brass screws holding standard skirting I could not.
but I would never do it myself.
