BT BMS-Tec® – Multi-Conductor Cables
Application and Construction
All PVC and HFFR sheathed multi-conductor cables are suitable for
Building Management Systems (BMS), Sound, Audio, Security, Safety,
Control and Instrumentation.
Wire = conductor without or with insulation. With insulation sometimes also indicated as core.
Conductor: flexible = twisted bare or tinned copper strands, ranging from 12 to 22AWG.
Insulation: Polypropylene (PP) for PVC (Polyvinyl Chloride) sheathed cables and Halogen-Free (HFFR) for HFFR sheathed cables. Both insulations are in accordance with BS EN 50290-2. Good strippable and coloured insulation. The colours are not interchangeable.
Colour scheme of wires with 12 or 14 AWG conductors: black-whitered- green-brown-blue-orange-yellow-purlpe-grey-pinktan.
Colour scheme of wires with ≥ 16AWG conductors: black-red-whitegreen- brown-blue-orange-yellow-purlpe-grey-pink-tan.
Cable core: two or more wires, twisted.
Good twisting (lay-length < 30 – 40D) is necessary otherwise the cable
can hardly be bending and will break after a few bends.
|24||7 x 32||7 x 0.2||≤ 88|
|22||7 x 30||7 x 0.25||≤ 57.4|
|20||7 x 28||7 x 0.32||≤ 32.16|
|18||7 x 26||7 x 0.40||≤ 22.7|
|16||19 x 29||19 x 0.28||≤ 15.47|
|14||19 x 27||19 x 0.36||≤ 9.36|
|12||19 x 25||19 x 0.45||≤ 5.61|
Drain wire: (only in combination with a screen): stranded tinned copper
wires. In order to avoid corrosion, it is recommended that drain wires
Screen: (if applicable): Helically applied (= as a spiral) Aluminium/
Polyester (Alpet) foil. For the flexibility of a cable a helically applied foil
is to be preferred. A longitudinally applied foil act more as a stiff tube =
more difficult to bend.
Sheath: grey PVC or purple HFFR or black UV-resistant HFFR, all in
accordance with BS EN 50290-2.