Multicore Silicone Rubber Flexibles (SIHF/P SIHF-GL/P)

SIHF Multicore silicone rubber insulated and sheathed
SIHF/P Multicore silicone rubber insulated and sheathed, with a galvanized steel wire braid overall
SIHG-GL/P Multicore silicone rubber insulated and sheathed, with a glass fibre tape and a galvanized steel wire braid overall

Application

Silicone cables are employed where insulations are subjected to extreme changes in temperature . They are heat resistant up to 180 Deg C , intermittently 220 Deg C .Due to good resistance in all weather conditions these cables can also be employed at temperatures as low as - 60 Deg C .
Upon and after combustion a residue of pure silica is produced and the cables continue to function . However, it is usual to provide a glass braid around the cable to prevent a break down of the silica during and after a fire . Silicone cables are halogen free and are most suitable for power plants . They have become indispensable in a wide range of industrial sectors , in foundries , steel and hot rolling mills, cooking equipment , cement , glass and ceramic factories, ship and aircraft construction , and oil burners.

Specification

  • Conductors: Flexible class 5 tinned copper conductors to BS 6360
  • Insulation: Silicone rubber
  • Sheath: Silicone rubber
  • SIHF : Minimum bending radius flexing 7.5 x o/dia fixed 4 x o/dia 
  • SIHF-P: Galvanized steel wire braid
  • Minimum bending radius flexing 10 x o/dia                  fixed 5 x o/dia 
  • Voltage rating 300 / 500V
  • Temperature rating
  • Fixed:   - 60 deg C to+ 180 deg C
  • Flexing: -25 deg C to+ 180 deg C
  • Available in Brick Red as standard.
  • White or Black on request.
SIHF SIHF - P
CORES &  
SIZE MM.2
NOMINAL
O/DIAMM
WEIGHT
KG/KM
NOMINAL
O/DIA MM
WEIGHT
KG/KM
2X0.75 6.4 53 7.5 90
2X1.0 6.6 60 7.6 97
2X1.5 7.6 82 8.6 125
2X2.5 9.2 135 10.2 185
3X0.75 6.8 64 7.8 100
3X1.0 7.4 78 8.5 120
3X1.5 8 98 9.2 145
3X2.5 9.7 152 11 200
3X4.0 11.4 220 12.5 310
3X6.0 14.2 338 15.7 430
4X0.75 7.8 84 9 130
4X1.0 8 95 9.3 140
4X1.5 8.8 120 10 170
4X2.5 10.6 189 12 270
4X4.0 13.1 295 14.4 380
4X6.0 16.2 440 17.7 540
4X10.0 20 700 21.5 920
4X16.0 24.3 985 26 1235
5X0.75 8.5 100 9.8 150
5X1.0 8.9 115 10.2 167
5X1.5 9.6 148 10.8 200
5X2.5 11.6 229 13 320
5X4.0 14.4 359 15.9 450
7X0.75 9.2 125 10.6 177
7X1.0 9.5 144 10.9 197
7X1.5 10.4 187 11.8 244
7X2.5 12.6 293 14 380
12X1.5 14 332 15.5 432
18X1.5 17.3 420 18.7 615
24X1.5 20 635 22 730

LARGER SIZES AVAILABLE ON SHORT LEAD TIMES

CURRENT RATINGS FOR SILICONE CABLES

The indicated values stated in the following tables are considered as guiding values. These are to be selected each particularly for the individual application.

Heat-resistance at an ambient temperature up to 150 deg C

  Group 1 Group 2 Group 3
Nominal cross-section Current carrying capacity A Protective fuse A Current carrying capacity A Protective fuse A Current carrying capacity A Protective fuse A
0.25mm 2.8                     -    -                     -    5                    -
0.5mm 6                        -    7                    -   10                   -
0.75mm 9                       6   12                   6   15                 10
1.0mm 12                    10   15                  10   19                 20
1.5mm 16                    16   18                  16   24                 25
2.5mm 21                    20   26                  25   32                 35
4.0mm 28                    25   34                  35   42                 50
6.0mm 36                    35   44                  50   54                 63
10.0mm 49                    50   61                  63   73                 80
16.0mm 65                    63   82                  80   98                100
25.0mm 85                    83 108               100 129               125
35.0mm 105                100 135                  - 158               160
50.0mm 140                125 168                  - 198               200
70.0mm 175                160 207                  - 245               250
95.0mm 210                200 250                   - 292               300
120.0mm 250                250 292                   - 344               335
150.0mm -                      -  335                   - 391                 -
185.0mm -                      - 382                   - 448                 -
240.0mm -                      - 453                   - 528                 -
300.0mm -                      - 523                   - 608                 -

Group 1: One or more single core cables laid in duct

Group 2:

Multicore cables, flexible cables laid in open or ventilated conduits

Group 3: Single core cables laid in open air with a spacing at least equal to diameter

Power ratings for ambient temperature over 150 deg C

The following conversion factors are valid:

Temperature 0c Current carrying capacity values in %
Up to 150 100
Over 150 to 155 91
Over 155 to 160 82
Over 160 to 165 71
Over 165 to 170 58
Over 170 to 175 41