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Tel
+44 (0)1424 856600
Fax
+44 (0)1424 856611
Technical Hotline
+44 (0)1424 856688
TECHNICAL INFORMATION
Technical information
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PVC-U perimeter trunking systems
Material
PVC-U is flame retardant and self-
extinguishing. It provides a 100%
recyclable material with good
sustainability.
Installation
Positioning
•
Mono 10
For dado application only.
•
Mono Plus 20 and 30
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. Adequate allowance
is made within the fittings for thermal
movement of the covers, which have a
7mm overlap on each side.
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
degree mitres.
•
Mono Plus 20 and 30
Cut the compartment segregators
(x 2 provided) to lengths to fit
between accessory boxes and
corners. Fit into position after wiring
has been completed.
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.
• External moulded fittings overlap the
joints by up to 7mm to cover cutting
inaccuracies.
•
Mono 10
For external bends and flat angles,
the base must be mitred 45 degrees
to ensure total enclosure of trunking,
including any internal fitted
segregator. Tees are fabricated.
•
Mono Plus 20 and 30
External bends should be cut
square at the corner and in internal
segregator inserted as shown below,
to give additional retention to the
clip-on fitting. Flat angles and tees
are prefabricated.
Bend radius control
•
Mono 10
Not applicable
•
Mono Plus 20 and 30
The data bend radius control fittings
for Mono Plus trunking provide a
bend radius of 25mm.
Accessory boxes
• If the accessory box is to be fed
from a supply in either of the
outer compartments, remove the
appropriate knock out (top or
bottom) and clip the box into the
trunking base.
• For boxes supplied from the
main compartment, 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.
Covers
The cover has been 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
The cover is clipped into place from the
front. If accessory boxes are installed,
the cover is butt-joined to the edge
of the box and the cut edges of the
cover is 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 the base.
Covers – removal
To remove the cover, first detach a
coupler, internal or external bend
component to gain access. The main
cover can then be gently eased off the
base.
Screening
Refer to the Technical Team on
+44 (0)1424 856688.
Antimicrobial
For technical details of antimicrobial
Mono 10 and Mono Plus 20 Bio
trunking, please refer to Laboratory
and Healthcare section.
Method of continuation through
a partition wall
Continue the main lateral run of base
through the partition wall with a
short length of cover fitted where the
trunking passes through the partition.
The partition wall trunking is then
butted up to the main run and the joint
covered by an Internal bend.
(as shown below)
arshallLtd.
Mono and Mono Plus trunking
– PVC-U
Min radius 25mm
3
3