Marine, OIL,GAS & Petrochemical Cables 

British Standard Fire resistant Shipwiring cables to BS 7917

Unarmoured 250V Instrumentation

Unarmoured 250V Instrumentation

Manufactured in both pairs and triples these 150/250V instrumentation cables provide collective or individual screening through the use of metallic foils and drain wires.

The latest SW4 Low Smoke Halogen Free sheathing compounds ensure that in the event of a fire the cables offer excellent protection to both people and property by not emitting toxic or corrosive gases whilst keeping emergency circuits operating.

Core Identification

Pairs :  Each pair black, white and numbered
Triples : Each triple black, white, red and numbered
(Alternative colour codes are available)

Technical Information

Voltage rating

150/250V

Conductors

Tinned, BS6360 class 2 or class 5

Temperature rating

+90°C maximum conductor temperature

Static temperature rating

-30°C to +90°C
Bending radius (static) 8 x cable O/D

Flame retardant

IEC60332 part 3A, BS4066 part 3A

Fire resistant

IEC60331 (3 hours @ +750°C)

Technical Data

No. of
Pairs
Nominal Conductor
Cross-Sectional
Area mm²
Nominal Diameter
of Cable
Min-Max mm
 Pairs collective
 3   0.75   14.0 - 16.0 
 7   0.75   18.6 - 20.7 
 12   0.75   24.4 - 27.0 
 20   0.75   30.8 - 34.0 
 27   0.75   35.0 - 38.4 
 37   0.75   38.8 - 42.6 
 3   1   14.8 - 16.8 
 7   1   19.6 - 22.0 
 12   1   25.8 - 28.5 
 20   1   32.6 - 35.8 
 27   1   37.3 - 40.8 
 37   1   41.3 - 45.2 
 Pairs individual
 1   0.75   8.1 - 9.8 
 3   0.75   14.0 - 16.0 
 7   0.75   19.0 - 21.1 
 12   0.75   23.8 - 26.4 
 20   0.75   30.4 - 33.5 
 27   0.75   34.6 - 37.9 
 37   0.75   40.5 - 44.3 
 1   1   8.5 - 10.3 
 3   1   15.0 - 17.0 
 7   1   20.0 - 22.5 
 12   1   25.4 - 28.0 
 20   1   32.1 - 35.3 
 27   1   36.8 - 40.2 
 37   1   43.0 - 47.0 
No. of
Triples
Nominal Conductor
Cross-Sectional
Area mm²
Diameter over
outer sheath
min-max mm
 Triples collective
 3   0.75   15.0 - 17.0 
 7   0.75   20.5 - 23.0 
 12   0.75   25.6 - 28.3 
 3   1   15.8 - 17.8 
 7   1   21.9 - 24.4 
 12   1   27.1 - 29.8 
 Triples individual
 1   0.75   8.1 - 9.8 
 3   0.75   15.0 - 17.0 
 7   0.75   20.8 - 23.3 
 12   0.75   25.8 - 28.5 
 1   1   8.7 - 10.5 
 3   1   15.8 - 17.9 
 7   1   22.0 - 24.5 
 12   1   27.5 - 30.2