Submersible pumps use a flat 3-core cable that runs down the borewell beside the pipe and resists water. Size it for the motor rating and, importantly, the depth — voltage drop over a long drop cable often means going one size up.
| Pump motor | Approx. current (1-ph) | Flat copper cable | Note |
|---|---|---|---|
| 0.5 HP | ~4 A | 1.5 sq mm | Shallow depths |
| 1 HP | ~7 A | 2.5 sq mm | Most common |
| 1.5 HP | ~10 A | 2.5–4 sq mm | Size up for deep wells |
| 2 HP | ~13 A | 4 sq mm | — |
| 3 HP | ~19 A | 6 sq mm | Check voltage drop |
Use a flat submersible-grade cable and account for depth. See which cable is best for a submersible pump and the multicore range.
Guidance only. Figures follow common Indian domestic practice (IS 732 / IS 694), assume copper conductors unless stated, and depend on run length, grouping, ambient temperature and installation. Always have the final design confirmed by a licensed electrician.