From what I can find out the box for 8 way (sunk) has 3 x 25mm knockouts to the base. So 3 x 25mm conduits for vertical drops.
What I need to feed in and out of 8 grid back box.
Ovens x 2 (13 amp each)
1 x 4mm radial circuit 32 amp in daisy chained from supply side of grid switch Oven 1 and Oven 2
2 x 2.5mm out to 2 unswitched single sockets under counter for oven plugs.
2 x 2.5mm ring circuit in / out
The ring to be looped in and out of 5 grid switches
1 x 1.5mm to 3 amp high level fused spur for hood extractor
1 x 1.5mm to 3 amp high level fused spur for wall extractor
1 x 1.5mm to 3 amp under counter fused spur for gas hob
1 x 2.5mm to 1 x unswitched single socket for washer unit
1 x grid fuse 3 amp feeding to grid switch for under wall unit LED strip, so 1.5mm out of back box.
Questions
Will a grid switch supply side take 2 x 4mm terminations
Would 3 x 25mm conduits have space for 1 x 4mm, 5 x 2.5mm and 4 x 1.5mm
What I need to feed in and out of 8 grid back box.
Ovens x 2 (13 amp each)
1 x 4mm radial circuit 32 amp in daisy chained from supply side of grid switch Oven 1 and Oven 2
2 x 2.5mm out to 2 unswitched single sockets under counter for oven plugs.
2 x 2.5mm ring circuit in / out
The ring to be looped in and out of 5 grid switches
1 x 1.5mm to 3 amp high level fused spur for hood extractor
1 x 1.5mm to 3 amp high level fused spur for wall extractor
1 x 1.5mm to 3 amp under counter fused spur for gas hob
1 x 2.5mm to 1 x unswitched single socket for washer unit
1 x grid fuse 3 amp feeding to grid switch for under wall unit LED strip, so 1.5mm out of back box.
Questions
Will a grid switch supply side take 2 x 4mm terminations
Would 3 x 25mm conduits have space for 1 x 4mm, 5 x 2.5mm and 4 x 1.5mm