Cable Sizing and Voltage-Drop Calculation for Gold-Mine Solar Pumps in Sudan
Introduction
The array may be sized right, but undersized cable quietly bleeds volts between panel and pump until the pump starves. This article covers cable sizing and voltage-drop calculation for gold-mine solar pumps, using Sudan’s goldfields—the Hassai and Red Sea hills belts—as the worked example, written by the solar-pumping specialists at KINBO. Correct ampacity and drop keep the controller fed, the electrical companion to our structure guide.
Table of Contents
Why Cable Sizing Matters
- Stop hidden losses—voltage drop across thin cable can waste more than a weak module, hurting the sizing margin.
- Avoid heat—undersized ampacity overheats and fails, a fire risk at the controller.
- Protect yield—our efficiency-audit guide catches drop-related losses in telemetry.
- Plan spares—our maintenance guide stocks the right gauge for swaps.
Sudan Goldfield Conditions
Sudan’s hot, dusty gold belts around Hassai run long cable runs between distant arrays and pumps, so drop adds up fast. Our dust-and-heat guide and monitoring guide frame the duties; here the prize is cable that delivers the volts the array makes.
Sizing Cable, Step-by-Step
- Get the current—from the sizing, read array Isc and the pump’s operating amps at the controller.
- Measure the run—the one-way distance from array to pump, both DC and AC legs.
- Pick the drop—allow 2 to 3 percent on DC, a little more on AC, so the pump sees rated volts.
- Choose the gauge—match ampacity with margin for heat, per our structure guide routing.
- Verify in monitoring—monitoring compares input to output volts, flagging a bad run per our efficiency-audit guide.
- Stock the spare—our maintenance guide keeps the right coil on hand.
Right-Sized vs Undersized Cable
| Aspect | Right-sized | Undersized |
|---|---|---|
| Voltage at pump | Near rated | Sags |
| Heat | Cool | Overheats |
| Yield | As designed | Lost to drop |
For the ownership maths, our TCO guide weighs cable cost against lost energy.
Frequently Asked Questions
What drop should I allow?
2 to 3 percent on the DC leg so the controller sees rated volts, per the sizing margin.
Does gauge beat length?
Both—long runs at Hassai need thicker cable; our efficiency-audit guide confirms the saved energy in telemetry.
How do I catch a bad run?
monitoring compares array to pump volts; a gap means drop or a fault.
How do I start a Sudan cable design?
Share your Hassai or Red-Sea-hills run lengths and we size cable that delivers every volt to your pump.
Related Articles
- DC/AC Controllers for Gold-Mine Solar Pumps
- PV Mounting Structures and Wind Resistance for Solar Pumps
- Energy Efficiency Audits for Gold-Mine Solar Pumps
- Explore KINBO Solar Pump Products
Deliver Every Volt to Your Sudan Gold-Mine Solar Pump
Tell KINBO your Hassai or Red-Sea-hills run lengths, and we will size cable that delivers every volt to your pump. Contact our team for a tailored quote.
Published by KINBO · October 12, 2026 · Category: Application Cases
