Hi all,
Have a relatively simple question. Doing a rewire to make a circuit in a single room. My father is a retired spark, so no worries about a DIYer doing electrics or anything, he just isn't sure about this particular question.
I'm aware modern PU foams like Soudal have no adverse affects on PVC cable, so no worries there. My question is, for one particular part of the run, I had to drill a hole through the bottom of the frame/floorboard into the joist spacing; to fish a couple of 2.5+1.5 300/500v T&E cables though to reach a socket on one wall.
As this is in an attic space, under the floorboards can get draughty. To prevent those draughts reaching up in between the wall (which had recently been redone with 50mm PIR + 25mm on top of the studs); and getting in between the two PIR sheets (thus ruining their insulation ability a bit), I foamed up that hole. Sealing it with mastic would've been difficult as reaching it properly around the back wasn't happening.
However, I am now wondering if that has had an adverse effect on the rating of the cable. From what I am gathering, such a short section of foam (probably no more than 5cm) shouldn't really do anything major, as the heat will just conduct to the rest of the cable. Just wondering if I am overthinking it or not.
As it's a bedroom, there won't be any significant loads—just things like a TV and gaming PC would be the biggest constant power draws in the room when they're on.
Have a relatively simple question. Doing a rewire to make a circuit in a single room. My father is a retired spark, so no worries about a DIYer doing electrics or anything, he just isn't sure about this particular question.
I'm aware modern PU foams like Soudal have no adverse affects on PVC cable, so no worries there. My question is, for one particular part of the run, I had to drill a hole through the bottom of the frame/floorboard into the joist spacing; to fish a couple of 2.5+1.5 300/500v T&E cables though to reach a socket on one wall.
As this is in an attic space, under the floorboards can get draughty. To prevent those draughts reaching up in between the wall (which had recently been redone with 50mm PIR + 25mm on top of the studs); and getting in between the two PIR sheets (thus ruining their insulation ability a bit), I foamed up that hole. Sealing it with mastic would've been difficult as reaching it properly around the back wasn't happening.
However, I am now wondering if that has had an adverse effect on the rating of the cable. From what I am gathering, such a short section of foam (probably no more than 5cm) shouldn't really do anything major, as the heat will just conduct to the rest of the cable. Just wondering if I am overthinking it or not.
As it's a bedroom, there won't be any significant loads—just things like a TV and gaming PC would be the biggest constant power draws in the room when they're on.
