Why neutral cable in elcb burnt?

A neutral cable in an ELCB (Earth Leakage Circuit Breaker) can burn due to several reasons, including overloading, poor connections, or a short circuit. When excessive current flows through the neutral wire, it generates heat, which can lead to insulation breakdown and eventual burning. Additionally, a loose or corroded connection can increase resistance, further raising the temperature and risking damage. Proper installation and regular maintenance are essential to prevent such failures.