Caravan hook up

davezawadi (David Stone):

I also would like to point out that PVC used for SWA, T&E and flexible cables is exactly the same composition, It is NOT water-permeable unless faulty or damaged. If it were the armour of SWA cables buried would be permanently wet, and subject to corrosion and this is not the case. It may be that some of the plasticiser is leached out by permanent immersion, but this is not fatal to the waterproof ability. PVC is damaged by sunlight and heat, and this may cause cracks. Poor quality cable sheaths may use recycled PVC, which could be full of all kinds of C##p, but BASEC cables should be fine. I don't quite know where this PVC is permeable myth came from, but it needs to be put to bed. PVC hoses do not leak, even under high pressure, so why should cables? Plasticised PVC is used everywhere for liquid containing purposes, the worst effect is seen when it is used for organic solvents where the plasticiser is gradually dissolved out, and the PVC becomes uPVC, like window frames very stiff, but still liquid tight.


A bit more stuff easily accessed. https://en.wikipedia.org/wiki/Polyvinyl_chloride#Mechanical

My experience specifically of PVC electrical cables doesn't support this view. I'm fully aware of the use of PVC in water pipes, but it's not exactly the same stuff.


Prysmian guidance here: https://www.whyprysmian.co.uk/underground.html

davezawadi (David Stone):

I also would like to point out that PVC used for SWA, T&E and flexible cables is exactly the same composition, It is NOT water-permeable unless faulty or damaged. If it were the armour of SWA cables buried would be permanently wet, and subject to corrosion and this is not the case. It may be that some of the plasticiser is leached out by permanent immersion, but this is not fatal to the waterproof ability. PVC is damaged by sunlight and heat, and this may cause cracks. Poor quality cable sheaths may use recycled PVC, which could be full of all kinds of C##p, but BASEC cables should be fine. I don't quite know where this PVC is permeable myth came from, but it needs to be put to bed. PVC hoses do not leak, even under high pressure, so why should cables? Plasticised PVC is used everywhere for liquid containing purposes, the worst effect is seen when it is used for organic solvents where the plasticiser is gradually dissolved out, and the PVC becomes uPVC, like window frames very stiff, but still liquid tight.


A bit more stuff easily accessed. https://en.wikipedia.org/wiki/Polyvinyl_chloride#Mechanical

My experience specifically of PVC electrical cables doesn't support this view. I'm fully aware of the use of PVC in water pipes, but it's not exactly the same stuff.


Prysmian guidance here: https://www.whyprysmian.co.uk/underground.html