Tool
Wire gauge calculator
Extending the wiring between your battery and motor? Check the minimum wire cross-section needed to stay under a 3% voltage drop.
Minimum wire cross-section
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Calculated for copper wire, at a maximum recommended voltage drop of 3% — length is entered one way, the calculator accounts for the return path itself (2×length). This applies to extending existing wiring — if you're installing a motor from scratch, use the cables supplied with the kit. If in doubt, contact us.
Voltage drop for available cross-sections
| Cross-section | Voltage drop | Rating |
|---|
Motor manufacturers' safety margins vary — if you're installing wire near the maximum allowed current or have doubts about the right cross-section, contact us or check the offer from one of our dealers.