For underground wiring in a bulk storage plant, what is required regarding an equipment grounding conductor?

In underground wiring applications, especially in settings like a bulk storage plant, the inclusion of an equipment grounding conductor is essential for several critical reasons. The primary function of an equipment grounding conductor is to provide a low-resistance path for electrical fault currents to facilitate the operation of overcurrent protective devices. This ensures that in the event of a fault, such as a short circuit, the excess current can effectively flow to ground, triggering the circuit protection mechanisms to shut off the power.

When you include an equipment grounding conductor to provide electrical continuity, it enhances the safety of the electrical system. This is particularly important in environments where large volumes of flammable materials might be present, as electrical faults could create a significant fire hazard. The grounding conductor, by ensuring a solid electrical connection to the ground, helps prevent dangerous situations caused by electrical faults, thus promoting safety and compliance with applicable electrical codes.

In summary, the requirement for the inclusion of an equipment grounding conductor in underground wiring ensures safety through fault current management and electrical reliability, particularly crucial in facilities handling bulk materials.