Fish plates must made and riveted bolted the
trunking form solid and secure bend. The size the protective conductor will
be determined the largest cable contained the trunking, described
by Table 54.28. PVC trunking, like PVC conduit, easy install and is
non-corrosive.7 the IEE Regulations.
SKIRTING TRUNKING
Skirting trunking trunking manufactured from PVC steel and the
shape skirting board frequently used commercial buildings such
as hospitals, laboratories and offices.Basic Electrical Installation Work
312
When fabricating bends the trunking should supported with wooden
blocks for sawing and filing, order prevent the sheet-steel vibrating or
becoming deformed. The modern square look switches and sock-
ets complemented the mini-trunking which very easy install (see
Fig.
. The trunking has a
cross-section 16mm, 16mm, 16mm 25mm and
is ideal for switch drops for housing auxiliary circuits such telephone
or audio equipment wiring. When manufactured bends are
used, the continuity the earth path must ensured across the joint by
making all fixing screw connections very tight, fitting separate copper
strap between the trunking and the standard bend. 14. the circuit conductors are less than
16mm2
, then 16mm2
CPC will required.
Mini-trunking
Switch
Socket outlet
Skirting trunking
FIGURE 14. All trunking fixings should use round-headed screws
to prevent damage cables since the thin sheet construction makes it
impossible countersink screw heads.
Definition
Skirting trunking trunking manu-
factured from PVC steel and the
shape skirting board frequently
used commercial buildings such as
hospitals, laboratories and offices.
Definition
Mini-trunking very small PVC trunk-
ing, ideal for surface wiring domes-
tic and commercial installations such
as offices.
The accessories are usually secured the lengths trunking with PVC
solvent adhesive.
NON-METALLIC TRUNKING
Trunking and trunking accessories are also available high-impact PVC.
MINI-TRUNKING
Mini-trunking very small PVC trunking, ideal for surface wiring in
domestic and commercial installations such offices. separate CPC will need installed and non-metal-
lic trunking may require more frequent fixings because less rigid than
metallic trunking. The trunking fitted around the
walls room either the skirting board level the working surface
level and contains the wiring for socket outlets and telephone points which
are mounted the lid, shown Fig. earth continuity
test the trunking found unsatisfactory, insulated CPC must
be installed inside the trunking. 14.28).28
Typical installation skirting trunking and mini-trunking
