Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

installed. The effective overall cross-sectional area of a noncircular
cable is taken as that of a circle of diameter equal to
the major axis of the cable.)
14F Enclosures of Busbar Trunking System and Powertrack
System
Requirements for the enclosures of busbar trunking system are described in
Code 26B. A powertrack system should comply with BS EN 61534 series.
14G Workmanship
(a) Conduits should not be bent in such a manner which appreciably
distorts their original cross-sectional shape or causes damage to the
conduits.
(b) Burrs, sharp edges and projections should be removed from the
internal surfaces and ends of conduits, trunking or other enclosures
when installed.
(c) Where the protective coating on a metallic enclosure has been
damaged after installation, such surface should be effectively
restored by paint or other suitable coating to prevent corrosion.
(d ) Other details relating to the workmanship of installation of conduits
and trunking are described in Code 25.
Table 14(1)
Minimum Thickness of Body Material for Metallic Trunking
Nominal Size
(mm × mm)
050 × 50 0
075 × 50 0
075 × 75 0
100 × 75 0
150 × 100
150 × 150
Minimum Thickness of Body
Material (in mm)
1.0
1.2
1.2
1.2
1.4
1.6
(Note: Metallic trunkings having nominal size differing from the table but
complying with IEC 61084 or equivalent are also acceptable.)
100