1100 Volts Twin Core Unarmoured Cables 
(Aluminium Conductor) Type 'AYY' to IS:1554(I) - 1988
Sl.     Normal Cross-Sectional Area of Conductor in mm2                      
No. Description Unit  1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400
  Constructional Details                                    
  Conductor (solid)                                  
1 Minimum number of wires nos. 1 1 1 1 1 6 6 6 6 12 15 15 15 30 30 30 53
2 Shape       Circular  Solid     Compacted             shaped        
             
                                       
  Conductor (stranded)                                  
  Minimum number of wires nos. 3 3 3 3 7 6 6 6 6 12 15 15 15 30 30 30 53
  Shape       Circular  Stranded     Compacted             shaped        
             
                                       
  Insulation      
3 Type                       PVC Compound Type A to IS:5831            
4 Nominal thickness mm 0.8 0.9 1.0 1.0 1.0 1.0 1.2 1.2 1.4 1.4 1.6 1.6 1.8 2 2.2 2.4 2.6
5 Colour scheme for identification Inner & Outer      Red & Black  
  sheath  (Applied in one operation)      
  Dia over laid up core     9.45 10.87 11.64 11.03 13.55 15.03 17.78 19.91 23.18 25.13 28.40 31.33 35.14 39.12 44.15
  Dia over inner sheath     10.45 11.87 12.62 12.03 14.55 16.03 18.78 21.11 24.38 26.53 29.80 32.73 36.54 41.12 46.15
6 Type         PVC Compound TypeST1 to IS:5831      
7 Colour      Black  
8 Minimum thickness of inner sheath   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 0.50 0.50 0.60 0.70
9 Nominal thickness of outer sheath   1.80 1.80 1.80 1.80 1.80 1.80 2.00 2.00 2.00 2.00 2.00 2.00 2.40 2.40 2.60 2.80 3.20
10 Approximate overall diameter of CBL mm     14.15 15.57 16.34 15.63 18.15 29.63 22.38 24.71 27.98 30.53 33.80 36.73 40.54 45.12 50.55
  ELECTRICAL CHARECTERSTICS      
11 Resistance of conductor per                                     
  1000m length of completed cable                                    
  a) Maximum d.c. resistance                    
      at 20 Deg. C. ohm 18.1 12.1 7.41 4.61 3.08 1.91 1.20 0.868 0.641 0.443 0.320 0.253 0.206 0.164 0.125 0.1 0.0778
  b) a.c. resistance at 70 Deg. C ohm 21.72 14.52 8.89 5.53 3.70 2.29 1.44 1.042 0.77 0.532 0.385 0.304 0.248 0.198 0.152 0.122 0.0962
12 Continuous current rating (a.c.) of                                     
  cables under standard conditions      
  i) When laid direct in ground amps 18 25 32 40 55 70 90 110 135 160 190 210 240 275 320 355 385
  ii) When laid in ducts amps 16 21 27 34 45 58 76 92 115 140 170 190 210 240 275 305 345
  iii)When laid in air amps 16 21 27 35 47 58 78 99 125 150 185 210 240 275 325 365 420
13 Reactance per 1000m length of                                    
  cable at 50 Hz ohm 0.092 0.087 0.081 0.073 0.064 0.055 0.054 0.05 0.05 0.046 0.043 0.042 0.042 0.042 0.041 0.040 0.040
14 Capacitance between conductors per 1000m  micro                                  
  length of cable farad 0.113 0.12 0.13 0.14 0.16 0.18 0.18 0.2 0.2 0.21 0.22 0.23 0.23 0.23 0.23 0.23 0.24
15 Minimum volume resistivity                                    
  of PVC insulation cm                     1 x 10 13 at 27 Deg C and 1 x 10 10 at 70 Deg C            
16 Maximum permissible shortcircuit kilo                                   
  current for duration of one sencond amps 0.114 0.190 0.304 0.456 0.760 1.216 1.900 2.660 3.800 5.320 7.220 9.120 11.400 14.060 18.240 22.800 30.400
17 Voltage drop per 1000m length of                                     
  cable (assuming  cable used on single phase       
  a.c system)                                    
  a) When laid direct in ground volts 782 726 570 442 408 320 260 228 208 170 148 128 120 112 100 92 80
b) When laid in ducts volts 696 610 480 376 334 266 218 192 178 150 132 116 106 98 86 78 72
c)When laid in air volts 696 610 480 388 348 270 224 206 192 162 144 128 120 112 102 94 88
  GENERAL  :    
18 Approximate net weight per 1000 m  kg 140 175 234 268 325 322 435 519 661 788 1021 1244 1497 1900 2247 2786 3497
  length of finished cable                                    
19 Stranded length of cable (subject to  m                     500         250 250
  a manufacturing tolerance +/-5%)                                    
20 Drum Dimensions-    
  a) Approximate overall height  mm 840 840 840 840 940 1040 1040 1140 1250 1250 1450 1450 1550 1650 1650 1550 1650
  b) Approximate outer width mm 515 515 665 665 690 715 715 715 855 855 855 855 910 1130 1130 910 1130
21 Approximate gross weight of drum kg 120 135 165 185 230 295 300 355 460 540 725 830 1025 1260 1535 1010 1290
22 Minimum bending radius for laying                    12 x Overall Diameter of cable            
  of cable                                     
23 Recommended pulling force:    
  a) When conductor pulled by pulling                                     
  eye N                 30 x Total Conductor Area in mm2                
  b) When cable pulled with stocking  N 5 x D2 where D is the Overall Diameter of cable in mm2  
            STRANDED CONDUCTOR IS ALSO PERMISSIBLE IN THESE SIZES