When in doubt, go one size larger. The cost of copper today is trivial compared to the cost of a trench re-dig, a fire investigation, or a day of factory downtime.
Disclaimer: This post is for informational purposes. Always refer to your local electrical code (NEC, IEC, BS) and consult a licensed electrical engineer for critical installations. cable rating calculation
( I = \frac{10,000}{\sqrt{3} \times 415 \times 0.85} \approx 16.4 \text{ Amps} ) When in doubt, go one size larger
Choosing the right cable isn't about guessing "thick enough." It’s about : the maximum current a cable can carry before the insulation fails. Get it wrong, and you risk voltage drops, equipment failure, or electrical fires. Always refer to your local electrical code (NEC,
( VD = \sqrt{3} \times 150 \times 16.4 \times 0.0045 ) ( VD = 19.2 \text{ Volts} )