Rory asks this question, which is about the reference method for installing cable above insulation in a loft. It has been answered by the NICEIC (Theme – Distribution Equipment including Cable Management):
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Question: Could you please tell me which reference method is applicable to a cable in a loft running across the top of insulation?
I’m being told by colleagues to '100 ' it but it clearly isn't subject to the same conditions as if it were beneath 100mm of insulation - and to de-rate to such extent would seem excessive. What are your views?
Answer: If cabling in a loft is installed on top of the insulation, then this would be ‘clipped direct’ Method C.
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