"And how are they installed?"
"Do it properly," Vance said, sliding the IEC code back to him. "Move to a larger cross-section. Maybe split the circuits into two separate trays to improve the grouping factor. Or use spaced trays. IEC doesn't just give you rules to make your life hard, Hassan. It gives you rules to stop copper from turning into a heater." cable derating factor as per iec
"0.79 times 0.58... that's ."
Hassan wiped sweat from his forehead. "I... I need to resize it." "And how are they installed
Vance nodded slowly. He opened the IEC 60364-5-52 standard on his desk—a book with worn edges and sticky notes protruding from every page. He slid it across the table to Hassan. Or use spaced trays
Here’s a helpful review of (primarily IEC 60287 series), focusing on the key principles, applicable factors, and practical considerations.
Vance pointed out the window at the row of black cable trays already mounted on the wall, waiting for the wires.