Jonathon

Hello, I'm looking for some advice. My parents live in a HMO. It's a 3 storey building with 1 flat to each floor, they live in the top floor and have access to the loft space. I was up there last week and noticed that the builder/electrical installer has not used LZOH cable. The building was new in 2017 when they moved in. It hasn't been laid particularly neatly as some is underneath the insulation and some on top. Can anyone tell me if this is a legal requirement in HMO's? and where the regulations state this? I don't believe that it is in normal residential buildings. I do understand that it is in business premises. Additionally do fitted spotlights, they are LED, in the ceiling need to have hoods fitted above in the loft space to create an airgap around the fitting where otherwise loft insulation would just be laid straight on top. So that the fittings (I don't have a make/model) get pretty hot to the touch and so would be a potential fire hazard. What about other cable types too Speakers, Burglar alarm, smoke/fire detectors? Thank you