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Email
sales@marshall-tufflex.com
www.marshall-tufflex.com
PVC-U Perimeter trunking systems
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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
When used as a skirting system,
sufficient clearance should be allowed
between the floor covering and the
profile fittings that clip over the cover
i.e. 5mm + floor covering is
recommended.
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 have a 10mm
overlap on each side to allow for
thermal movement of the covers.
Fitting
• The base is supplied with pre-cut
elongated holes at 250mm centres.
• Internal couplers on base units are
not required.
• To fasten base, use No 8 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 moulded fittings overlap the
joints by up to 10mm to cover
cutting inaccuracies.
• A variable angle jig-saw or chop saw
is recommended for cutting 45°
mitres.
• To increase number of compartments
to any number required, use base
extension EBE1WH and extendable
base EEB1.
Single lengths
Where it is required to fit a single
length of trunking (under 3 metres)
between two inside walls and no
accessory box is fitted, it is advisable to
install a coupler in the centre of the run
to facilitate the removal of the cover.
Joints and bends
• Base joints should have a 3mm gap
to allow for expansion.
• Internal, external bends and flat
angles, the base must be mitred 45°
to ensure total enclosure of trunking,
including any internal fitted
segregator.
• Flat angles, tees and crossovers are
available prefabricated.
• External moulded fittings overlap the
joints by up to 10mm to cover
cutting inaccuracies.
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. If accessory boxes are installed,
the ETL1 cover is butt-joined to the
edge of the box. Cut edges of the
cover are subsequently concealed by
the accessory. For 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 detach a
coupler, internal or external bend
component to gain access. The main
cover can then be gently eased off the
base. To remove the outer cover, firstly
ease from the base by inserting the
blade of a terminal screwdriver
between the captive legs of the cover
and the base and then ease away from
the base.
Screening
Special conductive spray coating can
be applied to one compartment, the
cover, accessory boxes and fittings, to
screen data cables against EMI
interference.
•
For data/voice circuits only:
Warning: Owing to its relatively high
surface resistance, CS coating
SHOULD NOT be in contact with low
voltage circuits BS7671 (1992) 50
V.A.C. – 1000 V.A.C. unless additional
measures are undertaken.
Antimicrobial
For technical details of antimicrobial
Sterling Profile Bio trunking, please
refer to Laboratory and Healthcare
section.
3 MM
3 MM
3 MM
3 MM
50 MM
MAX
3 MM
INSERT SCREWDRIVER
INTO SHADED AREA
LEVER OUT
DRILL HOLE OF
SUITABLE SIZE
Sterling profile trunking
Bend radius control
The data internal and external bend
radius control fittings for Sterling Profile
trunking provide a bend radius of
50mm.
Accessory boxes
• For mounting an accessory box in the
alternative compartment to supply,
drill the main web adjacent to the
box position.
• Remove the appropriate knock out
and clip the box into the trunking
base.
• For boxes in the same compartment
as the supply, remove the
appropriate box knock-outs and clip
the box into trunking base.
• When boxes are installed
consecutively, a 14mm wide spacer
(ES1) is required to cover the space
between the boxes.
• Part M box assemblies with
contrasting coloured faceplates are
available to meet the requirements of
DDA regulations for Visual
Impairment.
5mm +
FLOOR
COVERING
