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Have a sub panel/CU upstairs fed with 16mm - it has a it’s own main switch and everything is RCD protected. At the moment it’s supply comes out of the main CU on a 32amp MCB - does this need amending? Does it need another main switch at source?

Very Good point Doc!  The tray is used as the house has a lot of centralised lighting circuits, plus with a divider the tray carries lots of CAT6, spker cables etc.  The reason i thought i'd carry it on is there is a 100mm space behind the kitchen units and its a way of cable managing 5-or 6...

Its Domestic.  Funny how some sparks swear by 4mm and others perfectly happy with a ring.  So yeah, cable tray just for convenience - just so happens that the main 'riser' cable tray thats carries Mains and Low voltage for the whole house drops into the kitchen so want to continue with a...

Hi, Wondering what method is best to go from a raised (metal) cable try into a wall chasing?  Do you you run the cable through one of the circular holes and use a grommet?  Or do you just cut the cable tray 'ridge' to exit the cable - this means running cable over jagged cut metal - which seems...