Marco held up his phone, the calculator still glowing on the screen. "Because this thing doesn't guess. It uses Kirchhoff’s laws. It knows the resistance of copper at 75°C. It knows that if I go smaller, I lose 12 volts and the roaster thinks it's dying."
It showed that at 185 feet, with 48 amps, he’d lose only 6.7 volts. The roaster would hum perfectly. The wires would stay cool. electrical cable thickness calculator
Above him, Elena was waiting. She ran the new coffee roastery. "Marco! Can we flip the breaker yet?" Marco held up his phone, the calculator still
He grinned. "We're not wiring a lamp, Elena. We're feeding a dragon. And this little calculator just told me exactly what gauge sword to use." Marco held up his phone