Cable Size Current Carrying Capacity -

“Current-carrying capacity isn’t just about the copper,” Marco said. “It’s about getting rid of the heat the copper makes. Resistance creates heat. Every electron squeezing through that wire is like a runner in a tunnel. The more runners, the more heat. The insulation can only take so much before it gives up—usually 70, 90, or 105 degrees Celsius, depending on the type.”

“She got too hot, didn’t she, Marco?” asked Lena, the new junior engineer. She held the specs in her hand, fresh from the office upstairs. cable size current carrying capacity

He pointed up. The cable tray was a spaghetti bowl of a dozen other power cables, all running together for fifty meters in the hot, dusty ceiling. Above that, a steam pipe from the boiler room leaked a faint haze of heat. Every electron squeezing through that wire is like