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I have put extra loft insualtion in my loft, now a total of 300mm. At the sam time I have installed additional beams at 90 degreees to existing joists supportin flooring for storage. There are 2.5mm cables for ring circuits on 32 amp mcb, 1.5 mm lighting circuits on 6 amp mcb and 10mm cooker...

My CU is mounted in the garage and I feel that I should protect the cables running in to it. There is a 70cm run of cable before the cables go throuth the wall in to the loft. My dilema is that as there are 11 cables I believe that I shoud de rate the cables if I put them in a single run of...