This may necessary more convenient bend
or set non-standard, but does take more time fabricate bends than
merely bolt standard accessories. 14.27
Alternative trunking bends.
Trunking supplied lengths and various cross-sections measured
in millimetres from 300 150.
Definition
Metallic trunking formed from mild
steel sheet, coated with grey sil-
ver enamel paint for internal use or
a hot-dipped galvanized coating
where damp conditions might be
encountered. Alternatively, bends may fabricated lengths trunking, as
shown Fig. Most trunking available in
either steel plastic. Trunking may thought more accessible conduit system and
for industrial and commercial installations replacing the larger con-
duit sizes.27. wide range accessories available, such
as 45° bends, 90° bends, tee and four-way junctions, for speedy on-site
assembly.Electrical installations and wiring systems
311
Trunking installations
A trunking enclosure provided for the protection cables which is
normally square rectangular cross-section, having one removable
side.
Standard accessory
90° bend
Fabricated 90°
bend
Copper earth
strip
Fishplate
FIGURE 14. When alteration extension
is required easy drill hole the side the trunking and run con-
duit the new point. trunking system can have great flexibility when used con-
junction with conduit; the trunking forms the background framework
for the installation, with conduits running from the trunking the point
controlling the current-using apparatus.
.
Definition
A trunking enclosure provided
for the protection cables which
is normally square rectangular in
cross-section, having one removable
side. The new wiring can then drawn through the new
conduit and the existing trunking the supply point. Trunking may thought a
more accessible conduit system.
METALLIC TRUNKING
Metallic trunking formed from mild steel sheet, coated with grey or
silver enamel paint for internal use hot-dipped galvanized coating
where damp conditions might encountered and made specifica-
tion defined 500 85
