Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This one, regarding wiring passing through a loft, is answered by the ECA:
The loft is insulated 150mm and boarded.
The cable also needs to pass through a joist. If a conduit is required - what type should I use?
The electrician will be completing the cabling - I just need to measure up and want to know what is required.
Answer: If you are planning to use PVC/PVC twin & earth cable, conduit or capping protection would be required where the cable is routed/concealed within the building fabric (not in the loft), and holes within timber joist would need to comply with Part A of the Building Regulations.
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