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Sterling
Twin Plus Technical Information |
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Sterling Twin Plus provides a
fully integrated solution for the installation of high performance data and
power cables in perimeter locations. The system has an extensive range of
moulded fittings that incorporate a large 50mm bend radius control that is
crucial to optimum cable performance. These fittings have also been designed
to give improved appearance and security to surface cables. The twin
segregated compartments and self aligning two-piece fittings, offer ease of
access to each individual compartment for greater safety. Marshall-Tufflex
Sterling Plus is an efficient economical solution to power and high
performance data cable management.
POSITIONING
When using as a skirting system, sufficient clearance should be allowed for
between the floor covering and the trunking (5mm + floor covering). |
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MATERIAL DATA ABS
Marshall-Tufflex Cable
Management Products are produced in High Impact ABS grade material
capable of withstanding the most hazardous conditions on site and which
exceeds the most
stringent requirements of the British Standards. |
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Characteristics of
Marshall-Tufflex High Impact ABS |
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Vicat Softening Point ISO
306 |
80ºC |
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Density |
1.18g/cm3 |
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Material |
UL |
UL listed |
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Flammability |
UL94 |
V-1 at 1.5mm
V-0 at 2.00mm |
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Flammability |
S4678:PT4:1982 |
Pass |
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Water Absorption |
ASTM D570 |
0.3% |
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INSTALLATION
PVC-U: The Sterling Twin Plus base in PVC-U is supplied with pre-cut elongated
holes at 250mm centres along its length to facilitate fastening. It should be
secured at 500mm intervals and within 50mm of the end on each base section.
Aluminium: Sterling Twin Plus
aluminium bases should be secured every 750mm utilising the grooves in the base
to facilitate the drilling of 6mm clearance holes.
Internal couplers are not required
on either PVC-U or aluminium base units.
When securing the base, use No. 8
round head screws and washers and avoid over-tightening to permit thermal
movement. It is recommended that the use of plastic caps over screw heads to
provide protection to the installed cables.
To cut the trunking base, use a
fine-toothed saw or power tool. An electric variable angle jigsaw will also aid
with the cutting to length and the 45-degree mitre.
JOINTS AND BENDS
At each joint, 3mm should be
left for expansion. Internal bends must be mitred to ensure total enclosure of trunking. External bends should be cut square, flat bends must be mitred at 45
degrees, tees and crossovers are available pre-fabricated from the Sterling Twin
Plus Range of fittings. None of the cutting is critical as the external moulded
clip-on fittings have a built-in 7mm overlap for the lid and sidewalls to cover
any inaccuracies.
SINGLE LENGTHS
Where it is required to fit a single length of trunking between two inside walls
(under 3metres), it is advisable to place an additional coupler set in the
centre of the trunking run in order to facilitate the removal of the cover if no
accessory has been fitted.
MMT2/MMT4 ADAPTORS
Adaptors are available from the Sterling Twin Plus range of fittings. Two
methods of fixing are as
follows:
1. drill a suitable hole in the
sidewall of the Sterling Twin Plus base, thread cables through the hole and into
the installed Mini Trunking. (Mini Trunking system technical information on page
220 of the main catalogue.)
2. cut the sidewall of the
Sterling Twin Plus base to aid cable installation None of the cutting is
critical as the clip-on fittings have a built-in overlap for the lid and
sidewalls. (For the installation of the Mini Trunking accessory boxes, shrouded
entry boxes, end caps and lid see page 220 in the main catalogue.)
BUSBAR ASSEMBLY
Upgrades the trunking to a 63A
Busbar distribution system. Comprises: carrier support, carrier clip, Busbar
rails, protective cover and cover screws. Can be fitted in either compartment of
the base. Requires Busbar adaptor (EBS 60) to position the Busbar assembly
within the trunking base (see page 209 in main catalogue). For Busbar fittings,
accessories and installation please refer to relevant sections of the main
catalogue.
ACCESSORY BOXES
Drill the main web if the
accessory
box is to be mounted in the alternative compartment to the supply. For boxes in
the same compartment supply, remove the appropriate box knock-outs, feed the
cable into box and then clip the box into trunking base. When assembled, the lid
is butt joined to the edge of the box (ESSB1/2/3 only) which is subsequently
covered when the accessory is fitted. When boxes are installed consecutively, a
14mm wide spacer (ES1) is required to cover the space between the boxes. All cut
edges of lid are concealed by the accessory or external fitting.
LID AND FITTINGS
Install radius inserts according
to instructions supplied with the individual fitting. When the cable
installation is completed, start at a convenient point and snap-clip the lid and
fitting alternately into place. Ensure the fitting overlaps the lid completely
DIMENSIONAL REFERENCE FOR OFFSETS
AND TEES
The minimum double set that can be
accommodated in the same plane (from internal to external bend).
STERLING TWIN PLUS CABLE
CAPACITY
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Type of Conductor |
Size |
Cable Factor |
Max. No. Cables in A @ 45%
Fill |
Max No. Cables in B @ 45%
Fill |
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Stranded PVC Power |
1.5mm2 |
8.6 |
248 |
127 |
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Stranded PVC Power |
2.5mm2 |
12.6 |
100 |
86 |
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Stranded PVC Power |
4.0mm2 |
16.6 |
128 |
65 |
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Stranded PVC Power |
6.0mm2 |
21.2 |
100 |
51 |
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Cat. 5e UTP |
ø5.5mm* |
30.2 |
70 |
36 |
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Cat. 5e STP |
ø6.0mm* |
36 |
59 |
30 |
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Cat. 6 UTP |
ø6.5mm* |
42.2 |
50 |
25 |
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Cat. 6 STP |
ø7.0mm* |
49 |
43 |
22 |
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*Typical values, check with manufacturer.
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Marshall Tufflex Products
