1100 Volts  Armoured Cables - 2.5 mm2
Type 'YWY' & "YFY" to IS:1554(I) - 1988
Sl.     NUMBER OF CORES                            
No. Description Unit  2 3 4 5 6 7 8 9 10 12 14 16 19 21 24 27 30 33 37 44 52 61
  Constructional Details    
  Conductor     
1 Material    PLAIN ANNEALED COPPER  
2 Number of wires nos.       7/0.67                            
3 Shape         Stranded Circular                        
  Insulation    
4 Type           PVC Compound Type A to IS:5831                
5 Nominal  thickness mm 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90
6 Colour scheme for identification   TWO CORE - Red, Black     THREE CORE - Red, Yellow, Blue                      
  (applied in one operation)   FOUR CORE - Red, Yellow, Blue, Black    
                        FIVE CORE - Red, Yellow, Blue, Black, Grey     
      SIX CORE AND ABOVE - Two adjacent cores(I.e. counting core &  
      & direction core) om each layer shall be blue & yellow   
      respectively and remaining cores shall be grey  
         
  Inner Sheath                                      
7 Type           EXTRUDED               WRAPPED          
8 Materials               PVC TAPE                 PVC TYPES        
9 Minimum thickness   0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.40 0.40 0.40 0.40 0.40
  Armouring                                      
10 Type & Material   Single Layer of Round      Single Layer of Flat Galvanised Steel Strip   
          Galvanised Steel Wires        
11 Nominal Diamtr of wire /thickness of strip  mm 1.4 1.4 1.4 1.4 1.4 1.4 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
  Outer Sheath                                      
12 Type             PVC Compound Type ST 2  to IS:5831              
13 Colour           Black           Black              
14 Minimum Thickness mm 1.24 1.24 1.24 1.24 1.24 1.24 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.40 1.56 1.56 1.56
15 Dia overall laid up core mm 7.70 8.30 9.30 10.30 11.50 11.50 12.40 13.20 14.00 15.30 16.90 18.00 19.20 20.40 23.00 23.60 24.80 25.70 26.80 30.60 32.10 34.50
16 Dia over inner sheath mm 8.70 9.30 10.30 11.50 12.50 12.50 13.40 14.20 15.00 16.30 17.90 19.00 20.20 21.40 24.00 24.60 25.60 26.90 28.00 31.80 33.30 35.70
17 Dia over armoured mm 11.50 12.10 13.10 14.10 15.30 15.30 16.20 16.00 16.80 18.10 19.70 20.80 22.00 23.20 25.80 26.40 27.40 28.70 29.80 33.60 35.10 37.50
18
Appr overall diameter of cable  mm 14.20 14.80 15.80 16.80 18.00 18.00 19.20 19.00 19.80 21.10 22.70 23.80 25.00 26.20 28.80 29.40 30.60 33.90 33.00 36.80 38.30 40.70
  ELECTRICAL CHARACTERISTICS                                      
19 Resistance of conductor per                                       
  1000m length of completed cable      
  a) Maximum d.c. resistance at 20 Deg C ohm                     7.41              
  b) a.c. resistance at 70 Deg. C ohm                     8.866              
20 Continuous current rating (a.c.) of       
  cables under standard conditions                                      
  i) When laid direct in ground amps 32 27 27 23 21 20 19 18 18 17 16 15 14 13 13 12 12 11 11 10 10 9
  ii) When laid in ducts amps 27 24 24 19 18 17 16 15 15 14 14 13 12 11 11 10 10 9 9 9 8 8
  iii)When laid in air amps 27 24 24 19 18 17 16 15 15 14 14 13 12 11 11 10 10 9 9 9 8 8
21 Reactance per 1000m length of cable                                      
  at 50 Hz ohm                     0.087              
22 Capacitance between conductors per 1000 Micro                                    
  mtr. length of cable farad                     0.120                
23 Minimum volume resistivity of PVC Insu ohm-cm   1 X 10 13 AT 27 Deg C and 1 x 10 10 at 70 Deg C  
24 Maximum permissible shortcircuit  kilo                                     
  current for short circuit duration of one second amps                     0.288              
25 Voltage drop per 1000m length of       
  cable (assuming three phase a.c. systems)         
  a) When laid direct in ground volts 567 479 479 408 372 355     319 301 284 266 248   231 213 213   195 177 177 160
  b) When laid in ducts volts 479 426 426 337 319 301     266 248 231 231 213   195 177 177   160 160 142 142
  c) When laid in air volts 479 426 426 337 319 301     266 248 231 231 213   195 177 177   160 160 142 142
  GENERAL :    
26 Approximate net weight per                                       
  1000m length of finished cable  kg 414 471 542 615 691 721 804 755 812 821 1036 1138 1276 1383 1562 1683 1831 1987 2161 2520 2771 3225
27 Standard length of cable (Subject to a                                      
  manufacturing tolerance +/-5%) m                     500          
28 Drum Dimensions-                                      
  a) Approximate overall height mm 940 940 940 1040 1040 1040     1140 1140 1250 1250 1250   1450 1450 1450   1550 1650 1650 1650
  b) Approximate outer width mm 690 690 690 715 715 715     715 715 855 855 855   855 855 855   910 1130 1130 1130
29 Approximate gross weight of drum kg 330 350 390 445 490 500     520 560 640 695 765   955 1015 1100   1325 1575 1740 1920
30 Minimum bending radius for laying of CBL                       12  x  Overall Diameter of Cable               
31 Recommended pulling force:                                      
  a) When conductor pulled by pulling eye N                     50 x Total Conductor Area in mm2              
  b) When cable pulled with stocking N                     9 x D2 where D is the Overall Diameter of cable in mm              
STRANDED CONDUCTOR IS ALSO PERMISSIBLE IN THESE SIZES