SOLUTION

Grounding Conductor, Equipment (EGC):- The conductive path(s) installed to connect normally non-current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.

Equipment grounding conductors (EGCs) are bonded to the system-grounded conductor to provide a low-impedance path for fault current that will facilitate the automatic operation of overcurrent devices under ground-fault conditions or facilitate the operation of ground detectors on ungrounded systems. When an energized (ungrounded) conductor makes electrical contact with the ground or a grounded part, the connection is called a ground fault. Low-impedance paths between a grounded part and the grounded service conductor are necessary to allow fault currents to rise to high enough values to cause circuit breakers or fuses to operate quickly. While the same consideration applies to short circuits, short circuits alone do not involve equipment grounding circuit pathways although they may involve grounded conductors.

EGCs may be individual conductors, metallic raceways, cable trays, metallic cable sheaths, or a combination of a raceway or cable tray and an individual conductor. Conductors must be sized on the basis of the circuit overcurrent device rating, but those sizing requirements do not apply to raceways.