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Expanding foam and PVC cable

JDW

Does expanding spray foam (the stuff that comes in cans for gap filling) damage PVC cable?


I have a small section on my ring main which is in contact with it, unfortunately I cannot access it as its under the shower tray!




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    Years' ago I wired three very TALL brand new, (each one being just one home / house), houses, in London.. 


    Once all of the works was completed I was called back, (as I was the electrical contractor). On the ground floor there were ducts, where we could run our cables... these ducts were then filled with loose foam particles, (don't know why as it was on the floor - maybe to ward off damp)? 


    All of the cables, that were covered in these loose foam granules, had started to 'blister!' 

    I told them that they'd better remove the granules and change the cables... I had no further involvement in any further works there!


    So, be careful!


    regards... Tom
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  • 0
    Years' ago I wired three very TALL brand new, (each one being just one home / house), houses, in London.. 


    Once all of the works was completed I was called back, (as I was the electrical contractor). On the ground floor there were ducts, where we could run our cables... these ducts were then filled with loose foam particles, (don't know why as it was on the floor - maybe to ward off damp)? 


    All of the cables, that were covered in these loose foam granules, had started to 'blister!' 

    I told them that they'd better remove the granules and change the cables... I had no further involvement in any further works there!


    So, be careful!


    regards... Tom
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