3-Core Flat Submersible Pump Cable
Three-core flat cable for three-phase submersible pump motors with Phase · Phase · Phase (Red, Yellow, Blue) core layout. Rated for continuous submerged operation. Class 5 fine-stranded copper supports installation in narrow borewells. Protective earthing of the motor frame is specified separately where required.
Dimensional & Electrical Data — ISI Marked 10mm² Submersible · IS 694:2010
Cross-sectional and electrical data for flat submersible cable. Conductor Class 5 per IS 8130:2013. BIS Licence CM/L-8800140116 applies up to 10mm².
| Size (mm²) | Stranding | Insul. thk (mm) | Sheath thk (mm) | Flat dims approx (mm) | Weight (kg/km) | Max DC R at 20°C (Ω/km) | Continuous rating — submerged (A) |
|---|---|---|---|---|---|---|---|
| ISI Marked Range (Stock) — BIS Licence CM/L-8800140116 | |||||||
| 1.5 | 30/0.25 | 0.7 | 0.9 | 8.5 × 4.8 | 70 | 13.3 | 14 |
| 2.5 | 50/0.25 | 0.8 | 1.0 | 10.5 × 5.8 | 110 | 7.98 | 20 |
| 4.0 | 56/0.30 | 0.8 | 1.0 | 12.0 × 6.5 | 162 | 4.95 | 26 |
| 6.0 | 84/0.30 | 0.8 | 1.0 | 14.0 × 7.5 | 230 | 3.30 | 35 |
| 10.0 | 80/0.40 | 1.0 | 1.2 | 17.5 × 8.8 | 385 | 1.91 | 46 |
| Heavy Industrial Range — Manufactured confirming to IS 694:2010 | |||||||
| 16.0 | 126/0.40 | 1.0 | 1.3 | 21.8 × 10.5 | 610 | 1.21 | 62 |
| 25.0 | 196/0.40 | 1.2 | 1.4 | 27.5 × 13.0 | 940 | 0.780 | 82 |
| 35.0 | 276/0.40 | 1.2 | 1.5 | 31.0 × 14.5 | 1280 | 0.554 | 102 |
| 50.0 | 396/0.40 | 1.4 | 1.7 | 36.5 × 16.8 | 1820 | 0.386 | 124 |
| 70.0 | 360/0.50 | 1.4 | 1.8 | 42.0 × 19.5 | 2510 | 0.272 | 156 |
| 95.0 | 480/0.50 | 1.6 | 2.0 | 50.5 × 23.5 | 3420 | 0.206 | 188 |
| Engineering Notes: BIS Licence CM/L-8800140116 applies up to 10mm² (ISI Mark scope). Configurations from 16mm² to 95mm² are manufactured confirming to IS 694 outside that licence scope — confirm lead time and documentation with our technical team. Voltage Drop (mV/A/m) — approximate at 70°C conductor temperature: 1.5mm²: 26.0 | 2.5mm²: 16.0 | 4.0mm²: 10.0 | 6.0mm²: 6.8. Logistics: Coils in plastic-free tart packing; project lengths >500m on steel-reinforced wooden drums. | |||||||
| Motor Rating | Motor kW | Full-load current — 1φ 230V (A) | Full-load current — 3φ 415V (A) | Recommended cable — up to 75m depth | Recommended cable — 75–150m depth |
|---|---|---|---|---|---|
| Single Phase 230V / Three Phase 415V — pf 0.85, η 85% | |||||
| 0.5 HP | 0.37 | 2.1 | — | 1.5mm² | 1.5mm² |
| 1 HP | 0.75 | 4.2 | — | 1.5mm² | 1.5mm² |
| 1.5 HP | 1.1 | 6.3 | — | 1.5mm² | 1.5mm² |
| 2 HP | 1.5 | 8.6 | 2.4 | 1.5mm² | 2.5mm² |
| 3 HP | 2.2 | 12.6 | 3.6 | 2.5mm² | 2.5mm² |
| 5 HP | 3.7 | 21.2 | 6.0 | 2.5mm² | 4.0mm² |
| 7.5 HP | 5.5 | — | 9.0 | 2.5mm² | 4.0mm² |
| 10 HP | 7.5 | — | 12.3 | 2.5mm² | 4.0mm² |
| 15 HP | 11.0 | — | 18.0 | 4.0mm² | 6.0mm² |
| 20 HP | 15.0 | — | 24.6 | 6.0mm² | 10.0mm² |
| Motor current calculated at pf 0.85, motor efficiency 85%. 1φ 230V motors typically available up to 3 HP; larger motors are 3φ 415V. 20 HP at 75–150m: 10.0mm² recommended to limit voltage drop. Always verify nameplate current and perform a voltage-drop check. Depth = cable length from starter to motor. | |||||
For projects requiring a dedicated internal earth conductor, National Cables manufactures a 4-core flat variant (3 Phase + 1 Earth). This eliminates the need for external earth tagging and is available as a custom order for institutional projects. Sizes above 10mm² and 4-core variants are subject to a 500-meter minimum order quantity.
Custom OEM · Confirm lead time with technical teamBuilt for continuous submerged duty.
Flat submersible cable construction layers are selected for water-ingress resistance and deep-well mechanical loading.
Pump duty features — ISI Marked 10mm² Submersible
Critical Installation Standards
Adherence to these rules ensures long-term insulation integrity and motor protection in deep-borewell environments.
Where this cable is deployed.
Flat submersible cable is specified for three-phase submersible pump motors across agriculture, residential, municipal, and industrial sectors. Sizes 1.5–4.0mm² cover the majority of Indian pump set applications.
Standards this product is manufactured to.
Flat submersible cable is manufactured to IS 694:2010 with Type D insulation and Type ST2 sheath compounds. Full BIS certification, test reports, and material traceability supplied with every consignment.
Flat submersible pump cable — technical questions answered.
Common questions from agricultural buyers, pump installers, EPC contractors, and water infrastructure specifiers about IS 694:2010 flat submersible cable.
What is the difference between 3-core flat and round submersible cable for borewells?
A 3-core flat cable arranges the three conductors in a single parallel row, creating a narrow, low-profile cross-section that passes easily through the tight clearance between the submersible pump motor body and the borewell casing wall (typically 100–150mm diameter).
Round cables have a larger radial profile and are generally used for larger-diameter bores or open wells. Both constructions are covered under IS 694:2010. Selection depends on borewell diameter, pump motor size, and installation clamping method.
Is IS 694 certification mandatory for agricultural pump cables in India?
Yes. Under India's Quality Control Order for cables (S.O. 280(E) issued January 2020), PVC insulated cables up to and including 1100V must bear the mandatory BIS ISI mark and conform to IS 694:2010. This applies to submersible pump cables used in agricultural, residential, and commercial installations.
National Cables holds BIS licence CM/L-8800140116 for IS 694:2010. Always verify both the ISI mark and the printed licence number on the cable sheath before purchase.
Why is 3-core flat cable preferred for narrow tube wells?
The flat parallel lay of the three conductors minimises the cable's radial cross-section, allowing it to pass through the tight annular gap between the submersible motor body and the borewell casing.
This low-profile design reduces the risk of mechanical snagging and sheath abrasion during installation and pump retrieval, and simplifies securing the cable alongside the riser pipe. It is an installation-handling preference, not a separate electrical certification class.
Can flat submersible cable be installed directly underground between the borewell and the pump panel?
Standard flat submersible cable to IS 694:2010 is designed for immersion inside borewell casings, not for unprotected direct burial in soil. The PVC insulation resists water and abrasion but provides no mechanical armour against soil pressure, stones, or rodent attack.
If the cable must traverse an underground section between the borewell head and the pump control panel, route it inside a protective duct or conduit. Consult your installation standard for specific burial protection requirements.
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Supplying to an international project?
This cable is manufactured to IS 694:2010 on a BIS-certified production line. The same facility produces equivalent international standards — if your project specifies H07RN-F or other European submersible pump cable standards, contact our export team to confirm specifications and documentation.