1. In most conductors, the resistance goes up with temperature. So the current is greatest when cold, and drops as the cable warms up.
2. Because of 1. The cable is naturally self-limiting - as it gets hotter, the current drops, which prevents any thermal runaway.
3. Who knows? Ask the manufacturer. Roughly speaking, the current is proportional to the cable length. But the breaker values there only vaguely approximate to that.
1. In most conductors, the resistance goes up with temperature. So the current is greatest when cold, and drops as the cable warms up.
2. Because of 1. The cable is naturally self-limiting - as it gets hotter, the current drops, which prevents any thermal runaway.
3. Who knows? Ask the manufacturer. Roughly speaking, the current is proportional to the cable length. But the breaker values there only vaguely approximate to that.
