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A
50
50
Email
sales@marshall-tufflex.com
www.marshall-tufflex.com
PVC–U Domestic and general trunking
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Technical information
Material
PVC-U is flame retardant and self-
extinguishing. It provides a 100%
recyclable material with good
sustainability.
Installation
Positioning
For surface wiring around ceilings.
Expansion/contraction
PVC-U expands and contracts at a
uniform rate of approx 5.25mm in a 3
metre length for a temperature change
of 25°C. Therefore, a 3mm gap between
each length of trunking base is
recommended. Fittings allow for
thermal expansion of the covers.
Fitting
• Secure trunking base in one plane
every 500mm by drilling 6mm holes
in the wall side of the trunking and
use round head screws and washers.
• Avoid over-tightening to permit
thermal movement.
• The use of plastic caps over screw
heads is recommended to protect
installed cables.
• To cut the trunking, use a fine-
toothed panel or power jig-saw.
• External profile fittings overlap joints
by up to 10mm to cover cutting
inaccuracies.
• A variable angle jig-saw or chop saw
is recommended for cutting 45°
mitres.
Joints and bends
• Base joints should have a 3mm gap
to allow for expansion.
• Base must be mitred 45˚ to ensure
total closure of trunking.
• End caps with clips ensure security of
trunking.
Covers
Covers are designed to limit
unauthorised removal and to remain in
position during normal conditions
irrespective of impact and minor
undulations of the mounting surface.
Covers – fitting
Covers are clipped into place from
front. For external moulded fittings, a
gap of 25mm is left between the two
cover ends to permit the fitting to clip
to base.
Covers – removal
To remove a cover, first remove a fitting
to gain access. Insert blade of terminal
screwdriver between captive legs of
cover and base and gently ease off.
Accessories
Accessories are serviced through a spur
using a mini trunking adaptor and mini
trunking across the ceiling to a
pendant drop or down the wall to an
appropriate accessory box.
Cable capacity chart
Cable
factor Compartment 1
PVC power cable
1.5mm
2
stranded copper
8.6
43
PVC power cable
2.5mm
2
stranded copper
12.6
29
PVC power cable
4.0mm
2
stranded copper
16.6
22
Data cable: Ø5.5mm
30.2
12
Data cable: Ø6.0mm
36
10
CEILING
WALL
1
Cable capacities
• All calculations allow for a
45% space factor.
As there can be differences between
data cable sizes, Marshall-Tufflex
recommend that cable dimensions are
confirmedwith themanufacturing
company.
Cornice trunking
1 = 837mm
2
total area
1 = 376mm
2
45% space factor
Dimensions
CEILING
APPLICATION
VERTICAL WALL
APPLICATION
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