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01424 856600
Fax
01424 856611
Technical Hotline
+44 (0) 1424 856688
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Underfloor to desk
Technical information
Electrical Characteristics
Rated Current
63
Amps
Rated Voltage
230
Volts
Frequency
50/60
Hz
Conditional Short Circuit Rating
(Protection device:BS88 fuse)
16
KA
Conductor Resistance Line & Neutral
3.2
mΩ/m
Conductor Impedance
1.6
mΩ/m
Volt Drops Line & Neutral
Powertrack
3.2
mV/A/m
Feed Unit + Coupler
2.2
mv/A
Tap-Off
0.73
mV/A
4mm2 Cable
12.0
mV/A/m
Coupler
1.5
mV/A
Interlink Unit
4.5
mV/A
10mm2 Cable (1.2m)
4.7
mV/A/m
Earth Fault Loop Impedance:
Line to Earth (Casing)
2.8
mΩ/m
Line to Earth (Conductor)
3.2
mΩ/m
Line to Earth (Conductor + Casing) 2.8
mΩ/m
Feed Unit + Coupler
2.2
mΩ
Tap-Off
0.73
mΩ
4mm
2
Cable
12.0
mΩ/m
Coupler
1.5
mΩ
Interlink Unit
4.5
mΩ
10mm
2
Cable
4.7
mΩ/m
Mechanical Data
Number of Copper Conductors
2 or 3
Conductor Cross-section Area
Nominal
12
mm2
Powertrack Casing Copper Equivalent
(Where casing is protective Earth) 12
mm2
Cable Termination Capacity
16
mm2
Tap-Off Cable 32A
4.0
mm2
Tap-Off Cable 13A or 16A
4.0
mm2
Tap-Off Conduit Sizes
Ø16 or Ø20 mm
Flexible Interlink Cable
10
mm2
Flexible Interlink Conduit
Ø25
mm
Feed Conduit Entry
2 x Ø25 mm
IP Rating
40
Minimum void depth (track + tap-off)
56
mm
Materials specification
Powertrack Casing
Galvanised Steel
Conductors
High Conductivity Copper
Powertrack Insulators
PBT
Sockets/Tap-Off Plug/Joint Mouldings Polycarbonate LSF
Shutter
PBT
Tap-Off/Interlink Flexible Conduit
Galvanised Steel
Tap-Off Cable
LSF cable to BS7211
Tap-Off/Coupler Blade
Brass Silver Plated
Feed Unit Case
Galvanised Steel
Flexible Interlink Cable
LSF cable to BS7211
Feed/Flexible Interlink Housing
Galvanised Steel
Ambient temperature correction factors
Temperature
25°C
30°C
35°C
40°C
50°C
Factor
1.13
1.07
1.0
0.92
0.76
Technical Specifications
Third party certified and tested to
comply with:
BS EN 60 439-1: 1999 IEC 60439-1: 1999
BS EN 60 439-2: 2000 IEC 60439-2: 2000
BS 5733: 1995 where applicable.
Marshall-Tufflex is registered by BSI to
BS EN ISO9001
MT Powertrack is designed to comply
with the requirements of BS 7671: 2008
(IEE Wiring Regulations).
Regulation 543.7
Installations to BS
7671:2008 Earthing
requirements for
the installation of
equipment having high
protective/conductor
currents.
The scope of Reg. 543.7.1.3 requires
that every final circuit intended to
supply one or more items of
equipment, where the total protective
conductor current is likely to exceed
10mA. in normal use, shall have a high
protective connection.
All MT Powertrack 507 tap-off units
conform to the high integrity
protective requirement by virtue of
using a protective conductor of 4mm²
enclosed within a flexible conduit, thus
providing additional protection against
mechanical damage.
Regulation 543.7.1.3(ii).
32Amp 3 metre tap-off unit
The 32Amp tap-off unit comprises of
an unfused tap-off* a flexible metal
conduit with integral 4mm² LSF
conductors.
These units are designed to comply
with regulation 434.2.1(i) of BS
7671:2008 by virtue of the following:
1
Maximum length of
cable is <3 metres.
2
Minimum risk of faults as the item is
factory assembled and fully tested.
3
Fully protected by flexible steel
conduit located within raised access
floor that offers further protection.
*Fused 3 metre tap-offs are
available if required.
5 metre tap-off unit
Tap-off units in excess of 3 metres
should only be used if they contain a
fuse or the powertrack is protected by
a 32Amp rated protective device.
