Some is, some isnt. I suspect someone laid the insulation after the electricians had finished wedging wires tight into back boxes! When I have more time i will expose it....63A
Not under insulation is it? That can drastically affect the current carrying capacity of the cable.
Its thick cable - will onlu just fit in the switch connectors really. Just measured and its 7 strands of copper just over 1mm diameter. Cables about 6mm diameter with the insulation and 5mm diameter with the strands twisted without insulation.