4 ms·
> EGC (which is bonded to the box), back to the source (usually a transformer) EGC is bonded to the panel enclosure at the ground bus. The neutral bus is also
by wrycoder 7y ago
> EGC (which is bonded to the box), back to the source (usually a transformer)
EGC is bonded to the panel enclosure at the ground bus. The neutral bus is also bonded to the enclosure with a ground screw. So, the EGC is directly connected to the neutral bus and a fault between hot and a bonded enclosure is routed via the EGC to neutral, tripping the breaker.