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TECHNICAL INFORMATION
Technical information
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MT32 Prefabricated and modular wiring
Earthing requirements for the
installation of equipment having
High Protective/Conductor
currents. BS 7671: 2008 Reg.
543.7
The scope of Reg. 543.7.1.203 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
integrity protective connection.
Singles Cabling
System 4.0mm
2
Final Circuit
MT32 singles systems conform to the
high integrity protective requirement
by virtue of having a single copper
protective conductor of 4mm², (Reg
543.7.1.203) with the protective
conductor being enclosed throughout
in trunking or flexible conduit to
provide additional protection against
mechanical damage.
Note: Different key ways apply
between 2.5mm² and 4.0mm²
Installation
MT32 pre-wired socket range
Fitting
• Plug in incoming pre-wired lead
(from previous socket or distribution
board) to appropriate connector
mounted in socket assembly box.
• Connect selected pre-wired lead to
outgoing connector mounted on
opposite side of socket assembly box.
• Clip complete assembly into trunking
compartment.
• When trunking cover is fitted, it
should be slid between back box
frame and the loosened accessory
face plate.
• Front plate is then fully tightened
down to clamp accessory in place.
• For pre-made close coupled
assemblies, use lid spacer (ES1WH)
between boxes.
MT32 Pre-wired underfloor power distribution
Singles Cabling System
Extension, Connection, Adaptor and Terminal Cables
Cable Type
6491B (HO1Z-R) to BS 7211 (LSOH)
Size
4.0mm² x 3 (PE) or 4.00m² x 4 (CE)
Connector Self Lock Retention
> 80N
Male/Female Connector Diameter
19.2mm
Terminal Block
6 x 4.0mm²
Adaptor (4.0mm²)
20mm
Underfloor Distribution System
Conduit Assembly, Tap Off and Adaptor
Cable Type
6491X (BASEC BS6004 H07V-R)
Protective Earth (P.E)
4.0mm² x 3 (Grey Plug)
Clean Earth (C.E)
4.0mm² x 4 (Red Plug)
Protection: Conduit Assembly
25mmSteel flexible conduit (>1KNTensile Load to BS EN 61386-23)
Protection: Tap Off
20mmSteel flexible conduit (>1KNTensile Load to BS EN 61386-23)
General Specification
Approvals: System
Designed to comply with BS 7671:2008 IEE Wiring Regulations
Approvals: Connector
Designed to comply with EN 61535:2009
(Fixed installation couplers for permanent connection)
Normal Voltage
250 volts
Frequency
50/60 Hertz
Volt Drop Line & Neutral Connector
1.0 mV/A/M
Volt Drop Line & Neutral
(Flexible Cabling System) 2.5mm
19.0 mV/A/M
Volt Drop Line & Neutral (Underfloor) 4.0mm 12.0 mV/A/M
Connector Impedance
1.0m Ω/connector
Connector, Body Material
PA66 – GF25
Connector Colour Female
Black
Connector Colour Male
White
Compatibility
Keyed against incorrect insertion
Operating Temperature (Ambient)
-5˚C to + 40˚C
Safety
PE contact engages first
Degree of Protection
Engaged IP2XC
p90/107
Product
Information
MT32 system with non-Marshall-
Tufflex socket assemblies
Fitting
• For non-Marshall-Tufflex accessories,
use pre-assembled outlet box unit.
• Connect cable tails to accessory in
accordance with wiring regulations
and fit accessory to back box.
• Connect pre-wired incoming and
outgoing leads and fit to trunking
(as above).
• For close coupled assemblies, use lid
spacer (ES1WH) between boxes.