SPECIFICATION FOR WIRE & CABLES COVERED UNDER IS : 694 (1990) CONSTRUCTION OF CONDUCTOR
 
NOMINAL CROSS SECTIONAL AREA
COPPER
Up to and including 6 mm2
Above 6 Mm2
ALUMINUM
Up to and including 6 mm2
Above 6 Mm2
SOLID / STRANDED FLEXIBLITY CLASS
Solid/Standard Class 1 or Class 2 of IS : 8130/1984
Stranded Class 2 of IS : 8130/1984
SINGLE CORE PVC INSULATED UNSHEATHED CABLES

Nominal Cross Sectional area of Conductor (mm2) Nominal Cross Thickness of insulation (mm) Overall Diameter Maximum (mm) Nominal Cross Sectional area of Conductor (mm2) Nominal Thickness of Insulation (mm) Overall Diameter Maximum (mm)
1* 0.7 3.2 50 1.4 13
1.5 0.7 3.4 70 1.4 15
2.5 0.8 4.2 95 1.6 17.5
4 0.8 4.8 120 1.6 19
6 0.8 5.6 150 1.8 21
10 1 7 185 2 23
16 1 8.2 240 2.2 26.5
25 1.2 10 300 2.4 29.5
35 1.2 11.5 400 2.6 33.5
      500 2.8 37.5
      600 2.8 42
 
* For Copper Conditions Only
PVC INSULATED SHEATHED CABLE

Nominal Cross
Senctional
Area of Conductor
Nominal Thickness
of insulation

Nominal Thickness Of Sheath Overall    Dimensions

Overall Dimensions

Single core Twin  core Three core Four core Single core Twin core circular Twin
Flat
Three circular Four circular
mm2 mm mm mm mm mm mm mm mm mm mm
1* 0.6 0.8 0.9 0.9 0.9 4.7 8.2 7.8´5.0 8.6 9.2
1.5 0.6 0.8 0.9 0.9 0.9 5 8.8 8.4´5.4 9.2 10
2.5 0.7 0.8 1 1 1 5.8 10.5 10´6.4 11 12
4 0.8 0.9 1 1.1 1.1 6.8 12 11.5´7.2 13 14
6 0.8 0.9 1.1 1.1 1.2 7.8 13.5 13.0´8.0 14.5 15.5
10 1 0.9 1.2 1.2 1.3 8.8 16.5 16.0´9.6 17.5 19.5
16 1 1 1.3 1.3 1.4 10.5 19 18.5´11.0 20 22.5
25 1.2 1.1 1.5 1.5 1.6 12.5 23 22.0´13.0 24.5 27.5
35 1.2 1.1 1.6 1.6 1.7 13.5 25.5 25.´14.5 27.5 30.5
50 1.4 1.2 1.7 1.7 1.8 15.5 29.5 29.0´16.5 31.5 35
* For Copper Conditions Only
SINGLE CORE, UNSHEATHED CABLE IN VOLTAGE GRADE 1100V

Nominal are of Conductor Number/Nom Dia of Wire Number/Nom Dia of Wire Aprox Overall Diameter

Current carrying capacity# 2 cables, single phase

Resistance(Max.) per km. @ 20oC
Ohms.

In conduit/Trunking (Amps.) Unenclosed clipped directly to a surface or on cable tray (Amps.)
0.75 24/2* 0.6 2.4 7    
1 14/.3* 0.7 2.8 11 12 18.1
1.5 22/.3* 0.7 3.1 13 16 12.1
4.5 36/.3* 0.8 3.8 18 22 7.41
4 56/.3* 0.8 4.4 24 29 4.95
6 84/.3* 0.8 5.2 31 37 3.3
Standard Colour : Black, Red, Blue and Green (fcr earthing) Supplied in 90 Meter length in attractive packaging # A Per IS : 3961 (Part –V) – 1968 *As per conductor Class 2 of IS : 8130/1984

CURRENT CARRYING CAPACITY
The Current rating given in the tables are based on the following assumptions.

a) Maximum Conductor  Temperature
-
70o C
b) Thermal Resistivity of Soil 

150o C cm/w

c) Thermal Resistivity of PVC 

650o C cm/w
d) Ground Temperature 

-

30o C
e) Ambient Air Temperature

40o C
f) Depth of Laying (to the highest point of the cable laid direct in round or to the top surface of ducts)
CURRENT RATING FACTOR

Voltage Grade
1100 Volts
Depth of laying cm. 75   90  105   120  150   180 & above
  i) Upto 25 mm2  1.0    0.99     0.98   0.97   0.96 0.95
  ii) Above 25 mm2 & upto 
     300 mm2
1.0 0.98 0.97  0.96   0.94 0.93
   iii) Above 300 mm2 1.0 0.97 0.96 0.95 0.92 0.91

Variation in ground Temperature o C

Ground Temperature o C 20 25  30 35  40  45 50  
Rating Factors   1.17  1.12   1.06 1.00 0.94  0.87  0.79 0.71

Variation in ambient air temperature o C

Ambient Temperature o C 20   25 30 35 40 45 50  
Rating Factors 1.33    1.25    1.16   1.09   1.00  0.90    0.08
 
 
 
 
 
 
 

TECHNICAL SPECIFICATION


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