protecting cable through wall for outside lights

[Guest112]

Been installing outside lights recently and drilling a 25mm hole to fit a 20mm pipe to the outside light and sealing it etc, Is it acceptable say to drill a 10mm hole to get an fp200 through the wall and seal it or is there a regulation saying it needs protection through the wall??

The only way the cable could get damaged really is if something fell down the cavity and hit the cable which is very unlikely, is this method ok guys??? thanks

 

[stuart569]

Nope no reg that states cable should be sleeved!

 

[MarkieSparkie]

There is NO requirement for additional mechanical protection of standard double insulated multi-core cables passing though an outside wall. You could use FP200, T+E, flex, SWA, e.t.c. as convenient. The cable must be sealed/fire-stopped on both sides of the wall to maintain the integrity of the building fabric.

 

[Simlec]

Your tube method is the correct way, as this will act as a protector against the polystyrene insulation that is injected within the cavity wall. As polystyrene reacts with PVC cable.

 

[stuart569]

What polystyrene insulation?

 

[Engineer54]

Your tube method is the correct way, as this will act as a protector against the polystyrene insulation that is injected within the cavity wall. As polystyrene reacts with PVC cable.

The modern stuff doesn't react with PVC cable or any other types of PVC these days!! It hasn't for quite some time now, but old habits and old information still abounds!!!

 

[i=p/u]

im led to believe its the old plystyrene that has these plasticisers in them, not the new stuff.., i believe its right to have pipe in the wall, but you seen it done so many times the other way

 

[GLENNSPARK]

The modern stuff doesn't react with PVC cable or any other types of PVC these days!! It hasn't for quite some time now, but old habits and old information still abounds!!!

Well i was guilty of that one n all...a while ago eng.....was on a kitchen install and the only way to get from the dis board to the kitchen was to come through under the stairs and into the kitchen that way (laminate floor throughout upstairs)....so got it to the kitchen and took it under the kitchen laminate floor (which was coming up and being renewed anyway)....loads of loose polystyrene granules underneath.....ran all the cables in some metal channel.......

 

[stuart569]

"The new stuff" is polyurethane.Changed in the 80's.Had this argument with site agents etc about kingspan,Stupid ex joiners

 

[i=p/u]

glensparks your ruff, put improviser at end of your alias:smilielol5:

 

[GLENNSPARK]

the thing is here though is as far as good install counts....it still applies ...in a roundabout kind of way...keeping cables away from insulation that is..........

 

[Engineer54]

"The new stuff" is polyurethane.Changed in the 80's.Had this argument with site agents etc about kingspan,Stupid ex joiners

Nope, The new stuff came in around the mid 90's and still called polystyrene. Mainly comes in bag's of balls, not in sheets, ... that is polyurethane. They just changed the chemical make-up slightly to take away the plasticising affect on PVC cables and building materials... But, there is still a hell of a lot of the older stuff about to be aware and cautious about!!!

 

[GLENNSPARK]

glensparks your ruff, put improviser at end of your alias:smilielol5:

it got the job done and i was under instruction here n all....lol...:lipsrsealed2:

 

[GLENNSPARK]

Nope, The new stuff came in around the mid 90's and still called polystyrene. Mainly comes in bag's of balls, not in sheets, ... that is polyurethane. They just changed the chemical make-up slightly to take away the plasticising affect on PVC cables and building materials... But, there is still a hell of a lot of the older stuff about to be aware and cautious about!!!

well the scenario i have just mentioned was an 80s build....about mid 80s i would say......

 

[Simlec]

New or old stuff, I keep my cables way from it, page 123 osg. Call me old fashion, plus it's much easyer to feed your cables through the wall.