Nominal Cross Sectional Area | No. of Wires in Conductors | Nom. Dia of Wire | Max. Resistance at 20°C | Nom. Thickness of Insualtion | ||
Single Core | Multi Core | Single Core | Multi Core | |||
Sqmm | No(s) | mm | Ω/Km | Ω/Km | mm | mm |
1.0 | 1 | 1.13 | 17.689 | 18.04 | 1.5 | 0.8 |
1.5 | 1 | 1.4 | 11.54 | 11.77 | 1.5 | 0.8 |
2.5 | 1 | 1.80 | 6.978 | 7.118 | 1.5 | 0.9 |
2.5 | 3 | 1.06 | 6.843 | 6.980 | 1.5 | 0.9 |
4 | 1 | 2.24 | 4.506 | 4.596 | 1.5 | 1.0 |
4 | 7 | 0.85 | 4.591 | 4.683 | 1.5 | 1.0 |
6 | 1 | 2.8 | 2.884 | 2.942 | 1.5 | 1.0 |
10 | 7 | 1.4 | 1.660 | 1.693 | 1.5 | 1.0 |
16 | 7 | 1.70 | 1.124 | 1.149 | 1.5 | 1.0 |
25 | 7 | 2.24 | 0.6484 | 0.6614 | 1.5 | 1.2 |
35 | 7 | 2.50 | 0.5205 | 0.5309 | 1.5 | 1.2 |
50 | 19 | 1.8 | 0.3706 | 0.3780 | 1.5 | 1.4 |
Insulation Resistance (M-Ω/Km) (Dry) (500 V DC for 1 Min. at 50°C) | 10 M-Ω/Km upto 2.5 mm2 Conductor 5 M-Ω/Km More than 2.5 mm2 Conductor |
Insulation Resistance (M-Ω/Km) (Wet) (500 V DC for 1 Min. at 50°C) | 7.5 M-Ω/Km upto 2.5 mm2 Conductor 5 M-Ω/Km More than 2.5 mm2 Conductor |
HV Test at Room Temp. | 4 KV AC (rms) or 12 KV DC (for 5 Min.) |
Conductor | Each conductor shall consist of a solid round/stranded wire(s) of annealed high conductivity copper, smoothly drawn, nominally circular in section , uniform in quality and resistance and free from defects. |
Insulation | Insulation shall be of PVC Compound conforming to requirements of Type-A compound of IS 5831:1984. Insulation color shall be as per customer specification. |
Core Formation | The insulated cores shall be laid up together with suitable lay. The outer most layer shall have right hand lay and the successive layers shall be laid with opposite lay. A polyester tape of suitable thickness shall be helically applied normally in cables with double steel tape with suitable overlap. |
Inner Sheath | The inner sheath shall be of PVC Compound conforming to requirements of Type- ST1 as per IS 5831:1984. |
Armouring | Armouring shall consist of the either Galvanised Round Wire strip/Double Steel Tape. |
Jacket | The outer sheath shall be of PVC Compound conforming to requirements of Type- ST1 as per IS 5831:1984. |