Uploaded October 2020 | Updated September 2026, 2 weeks ago

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An example of PVC insulated cable which has been in contact with expanded polystyrene cavity wall insulation.

There are two problems here - first being that the cable insulation is damaged when in contact with the expanded polystyrene, the second is the current capacity of the cable is significantly reduced when installed in insulation, which could result in the cable overheating.

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