MK Electric Catalogue No. 49

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610
CABLE MANAGEMENTOVERVIEW
Cable Management
Technical
PVCu
PVCu is used for the production of extrusions and mouldings and
is universally accepted as having the most suitable properties for
use within the electrical industry.
Standards and Approvals
All MK PVCu products are manufactured in accordance with
the requirements of BS EN 50085 Series, BS 4678: Part 4, BS
EN 61386 Series and BS 4662. The PVCu material used has
been tested by an approved laboratory in accordance with the
requirements of the following British Standards: BS 4607: Part 1,
BS 476: Part 7. Copies of test certificates are available upon
request. MK has been awarded ISO 9001: 2008 accreditation. The
system complies with all relevant requirements of BS 7671:2008.
CE marking
All relevant MK products in this brochure are CE marked,
confirmation that they meet the EMC and LV directives.
Performance
Strength Impact resistance High impact resistance
under normal climatic
conditions, BS 4678:
medium duty
Charpy notched impact strength 25 kJ/m 2
Tensile strength at yield 34.62 N/mm2
at break 42.00 N/mm2
Fire performance
The PVC-U materials used in the manufacture of MK products
are non-flame propagating in accordance with BS EN 61386,
BS EN 50085 and BS 4678. Extrusion material has been tested
by an accredited laboratory in accordance with the requirements
of BS 476: Part 7 and has achieved a Class 1Y classification.
Moulding material has been tested by an accredited laboratory
and conforms with IEC 695-2-1 at a severity of 650oC.
Thermal properties
All MK PVCu products are designed to accommodate local
thermal expansion. Fitting instructions explain the procedure
required to deal with the differential movement at the interface
with the building fabric.
Coefficient of linear expansion 55 x 10 -6/°C
(5mm/3000mm with a
temperature rise of 25°C)
Operating temperatures -5° to 60°C
Vicat softening point 81oC
Thermal conductivity 0.19w/mk
Chemical resistance
PVCu is non-corrosive and not affected by sea water. It has
excellent resistance to mineral acids, alkalis and detergents, good
resistance to alcohols, but liable to attack from solvents such as
keytones, aromatics and hydrocarbons.
Electrical
PVCu is non-conductive.
Dielectric strength 40 kV/mm in DBP
17 kV/mm in tx oil
Resistivity 1014 Ω ohm
Biological
Resistant to vermin and termites.
Workability
All MK PVCu products are lightweight and can be readily cut
and drilled with hand tools. Short component lengths can be
readily incorporated, reducing wastage of material. All covers and
accessories are manufactured to fine tolerances to ensure a tight
fit with ease of removal. Stop ends are secured to the carriers. For
details, see the relevant installation guide.
Durability
All MK PVCu products are stable and will maintain their
performance characteristics in accordance with the terms and
conditions described above.
Maintenance
Clip-on covers with optional screw fix and interchangeable
accessories provide continuous accessibility for rewiring, extensions
and modifications to an installation. Covers and accessories can be
cleaned with a damp cloth and household detergent. The surface
can be decorated with commercial paints if required
Mechanical performance
Impact resistance at -50C, BS EN 50085: medium duty for trunking,
BS EN 61386 heavy or medium, where relevant for conduits.
Aluminium
Standards and approvals
The Prestige 3D Aluminium System is manufactured in
accordance with the requirements of BS EN 50085-1:2005 and
BS EN 50085-2-1:2006. 1, 2 & 3 Gang Boxes conforming to
BS 4662 where applicable.
IEE Wiring Regulations
All products are designed and manufactured to allow installation
to comply with all relevant requirements of the latest edition of
BS 7671:2008.
Quality Assurance
The system is manufactured to BS EN ISO 9001:2008
Earth Continuity
The system makes provision for earth bonding where required in
accordance with BS 7671:2008.
When PVC cable trunking items are used that interrupt the earth
continuity, Earth Kits (VP218 & VP219) are required to ensure
continuity.
Impact Classification
Composite trunking systems (PVC / Al) will withstand “medium”
impact to BS EN 50085. Metal components will withstand “heavy”
impact as defined in BS EN 50085.
Thermal Properties
Min/Max installation and application temperature –5 to +60°C.
Coefficient of linear expansion 23 x 10-6 per°C.
1mm/m for 40 degree rise.
Maintenance
Resistant to staining. Wipe with soapy water (neutral 5/7 ph value).
Electrical Properties
Resistance to 0.03 ohm mm2/m.
Chemical Properties
Corrosion only occurs, to any extent, when ph value is less than 3 or
greater than 9.
Material Specification