.
The type bracket required will determined the installation, but
Fig.5.
Girder bracket
made from steel
rod supporting a
conduit
Angle
iron
truss
20 conduit
‘J’
bolt
Conduit fixed
to angle iron truss
with flat iron and ‘J’ bolt
Angle
iron
truss
Trunking fixed to
angle iron truss
by variation of
flat iron and ‘J’ bolt
Girder bracket
made from flat
iron supporting
a trunking
FIGURE 14.Basic Electrical Installation Work
322
Masonry
nail
PVC clip
PVC insulated and
sheathed cable
FIGURE 14.35 gives some examples brackets which may modified suit
particular circumstances.
Bracket supports
Conduit and trunking may fixed directly surface such brick wall
or concrete ceiling, but where cable runs are across girders other steel
framework, spring steel clips may used but support brackets clips
often require manufacturing. The use masonry nail means that fixings wood, plaster,
brick stone can made with equal ease.
FIXING METHODS
PVC insulated and sheathed wiring systems are usually fixed with PVC clips
in order comply with IEE Regulation 522.8.36 shows cable clip
of this type. 14.35
Bracket supports for conduits and trunking.3 and and shown Table
14. Figure 14.36
PVC insulated and sheathed cable clip. The clips are supplied various sizes hold the cable firmly, and
the fixing nail hardened masonry nail.
The brackets are usually made from flat iron, which painted after manu-
facturing prevent corrosion. They may made on-site the electri-
cian or, many brackets are required, the electrical contractor may make
a working sketch with dimensions and have the items manufactured a
blacksmith metal fabricator
