His apprentice, Maya, scrolled through her phone. "The spec sheet says the pump is 200 metres from the battery shed, Jack. We used 6mm² cable."
"What is it, then?"
Maya frowned. "So the pump sees low voltage, draws more current to compensate, overheats, and dies?" voltage drop calculator au
He flipped the paper over. On the back was a grid he'd been building for months. "Look," he said, pointing. "This is our new rule. For every 50 metres over 100, you don't just upsize the cable. You check the ambient temperature. In summer, the ground here hits 60°C. The copper's resistance goes through the roof." His apprentice, Maya, scrolled through her phone