SBJI Cables
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Single‑core cables are available with either a solid conductor or a stranded conductor. The choice between these constructions affects flexibility, current‑carrying capacity and mechanical robustness.
| Parameter | Solid conductor | Stranded conductor |
|---|---|---|
| Construction | One continuous copper conductor with PVC or XLPE insulation. | Multiple thin copper wires twisted together, insulated by PVC or XLPE. |
| Cable standards | IS 694 for PVC insulated single‑core cables; conductor as per IS 8130 class 1 (solid) or class 2/5 (stranded). | Same standards, class 2/5 for stranded construction. |
| Technical specification | Rated voltage typically 450/750 V; available sizes 0.5–10 mm²; less flexible but has slightly lower resistance per unit length. | Rated voltage 300/500 V or 450/750 V; flexible; more strands for larger sizes; slightly higher resistance due to lay length. |
| Characteristics | Rigid, better suited for fixed installations; easier termination; lower cost. | Highly flexible and vibration‑resistant; easier to route in confined spaces; better suited for portable equipment and applications subject to movement. |
| Applications | Building wiring, conduit installations, branch circuits, outdoor wiring where movement is limited. | Electronics, automotive harnesses, instrument wiring, patch cords and any installation requiring flexibility. |
| Size / Area in Sq.mm. | No. & size of wire | Conductor diameter (mm) | Nominal Insulation thickness (mm) | Overall core Diameter (mm) | Max. resistance @20°C (ohm/km) | Current rating (Amp.) |
|---|---|---|---|---|---|---|
| 1 | 1/1.13 | 1.13 | 0.7 | 3 | 18.1 | 11 |
| 1.5 | 3/0.81 | 1.75 | 0.7 | 3.3 | 12.8 | 15 |
| 2.5 | 3/1.04 | 2.24 | 0.8 | 4 | 7.41 | 20 |
| 4 | 7/0.85 | 2.55 | 0.8 | 4.4 | 4.61 | 27 |
| 6 | 7/1.04 | 3.12 | 0.8 | 5.1 | 3.1 | 34 |
| 10 | 7/1.35 | 4.05 | 1 | 6.5 | 1.83 | 48 |
| 16 | 19/1.03 | 5.15 | 1 | 7.8 | 1.15 | 63 |
| 25 | 19/1.29 | 6.45 | 1.2 | 9.5 | 0.73 | 78 |
| 35 | 19/1.53 | 7.65 | 1.2 | 11.5 | 0.52 | 99 |
| 50 | 19/1.83 | 9.15 | 1.4 | 13 | 0.38 | 130 |