Wiring systems ~ rewireable systems housed in horizontal conduits
can be cast into the structural floor slab or sited within the depth
of the floor screed. To ensure that such a system is rewireable,
draw-in boxes must be incorporated at regular intervals and not
more than two right angle boxes to be included between draw-in
points. Vertical conduits can be surface mounted or housed in a
chase cut in to a wall provided the depth of the chase is not more
than one-third of the wall thickness. A horizontal non-rewireable
system can be housed within the depth of the timber joists to a
suspended floor whereas vertical cables can be surface mounted or
housed in a length of conduit as described for rewireable systems.
Electrical Installations