Shipwiring/Offshore Screened Instrumentation Cables to BS7917
(Ref. 657M SW4 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. Good flexibility combined with the use of Mica glass tapes allow fire resistant circuits to be routed through confined spaces.

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.

      

Cable Construction -
Individually screened

Tinned copper wire conductors to BS 6360, class 2 or class 5, Mica tape, EPR insulation, cores twisted into pairs or triples, each pair/triple foil screened with a drain wire, SW4 LSHF sheath - blue or grey.

Cable Construction -
Collectively screened

Tinned copper wire conductors to BS 6360, class 2 or class 5, Mica tape, EPR insulation, cores twisted into pairs or triples, overall foil screen and drain wire, SW4 LSHF sheath - blue or grey.

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)

Armoured versions are also available, ref: 658M instrumentation

Technical Data - CMA Ref 657M SW4 Instrumentation to BS7917
Part No.
No. of
Pairs
Nominal Conductor
Cross-Sectional
Area mm²
Nominal Diameter
of Cable
Min-Max mm

 Pairs collective
 657C0703PxxHM   3   0.75   14.0 - 16.0 
 657C0707PxxHM   7   0.75   18.6 - 20.7 
 657C0712PxxHM   12   0.75   24.4 - 27.0 
 657C0720PxxHM   20   0.75   30.8 - 34.0 
 657C0727PxxHM   27   0.75   35.0 - 38.4 
 657C0737PxxHM   37   0.75   38.8 - 42.6 
           
 657C1003PxxHM   3   1   14.8 - 16.8 
 657C1007PxxHM   7   1   19.6 - 22.0 
 657C1012PxxHM   12   1   25.8 - 28.5 
 657C1020PxxHM   20   1   32.6 - 35.8 
 657C1027PxxHM   27   1   37.3 - 40.8 
 657C1037PxxHM   37   1   41.3 - 45.2 

 Pairs individual
 657I0701PxxHM   1   0.75   8.1 - 9.8 
 657I0703PxxHM   3   0.75   14.0 - 16.0 
 657I0707PxxHM   7   0.75   19.0 - 21.1 
 657I0712PxxHM   12   0.75   23.8 - 26.4 
 657I0720PxxHM   20   0.75   30.4 - 33.5 
 657I0727PxxHM   27   0.75   34.6 - 37.9 
 657I0737PxxHM   37   0.75   40.5 - 44.3 
              
 657I1001PxxHM   1   1   8.5 - 10.3 
 657I1003PxxHM   3   1   15.0 - 17.0 
 657I1007PxxHM   7   1   20.0 - 22.5 
 657I1012PxxHM   12   1   25.4 - 28.0 
 657I1020PxxHM   20   1   32.1 - 35.3 
 657I1027PxxHM   27   1   36.8 - 40.2 
 657I1037PxxHM   37   1   43.0 - 47.0 
Part No.
No. of
Triples
Nominal Conductor
Cross-Sectional
Area mm²
Diameter over
outer sheath
min-max mm

 Triples collective
 657C0703TxxHM   3   0.75   15.0 - 17.0 
 657C0707TxxHM   7   0.75   20.5 - 23.0 
 657C0712TxxHM   12   0.75   25.6 - 28.3 
           
 657C0703TxxHM   3   1   15.8 - 17.8 
 657C0707TxxHM   7   1   21.9 - 24.4 
 657C0712TxxHM   12   1   27.1 - 29.8 

 Triples individual
 657I0701TxxHM   1   0.75   8.1 - 9.8 
 657I0703TxxHM   3   0.75   15.0 - 17.0 
 657I0707TxxHM   7   0.75   20.8 - 23.3 
 657I0712TxxHM   12   0.75   25.8 - 28.5 
              
 657I0701TxxHM   1   1   8.7 - 10.5 
 657I0703TxxHM   3   1   15.8 - 17.9 
 657I0707TxxHM   7   1   22.0 - 24.5 
 657I0712TxxHM   12   1   27.5 - 30.2 
"xx" TO SHOW THE COLOUR PLEASE REPLACE "xx" WITH
 - 05 FOR GREY
 - 01 FOR BLUE

At FSC we refer to LSHF as Low Smoke Halogen Free

This term is interchangeable with LSZH (Low Smoke Zero Halogen), LSOH (Low Smoke Zero Halogen), OHLS (Zero Halogen Low Smoke) and FRNC (Flame Retardant Non-Corrosive). Beware of the terms LSF (Low Smoke and Fume) or RP (Reduced Propogation), when relating to signal or control cables will normally be modified PVC and produce 'Loads of Smoke and Fume'!
Back to last page Return to TOP