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I hope this question is in the correct section.
I am going to run a 1.5mm 3 core flex from my garage to a timber shed in 20mm plastic conduit distance approx 2ft.
My query is should I take the conduit into the shed via a 22mm hole or stop conduit at shed outer surface and pass flex through a smaller hole, I will seal gap in both cases with mastic.
This is to allow for expansion/contraction of timber due to ambient weather conditions.
The garage supply is rcd protected.
I am going to run a 1.5mm 3 core flex from my garage to a timber shed in 20mm plastic conduit distance approx 2ft.
My query is should I take the conduit into the shed via a 22mm hole or stop conduit at shed outer surface and pass flex through a smaller hole, I will seal gap in both cases with mastic.
This is to allow for expansion/contraction of timber due to ambient weather conditions.
The garage supply is rcd protected.