Which URD component is used as a fault-current rated grounding device?

• A. Grounding elbow
• B. Portable feed-through bushing
• C. Molded underground splice
• D. Disconnect switch

Answer: (A)

In URD systems, components that provide a reliable path to ground while withstanding fault currents are essential. A grounding elbow is specifically designed to serve as a fault-current rated grounding device at underground cable terminations. It bonds the cable in a contained, moisture-resistant enclosure and creates a low-impedance path to ground, so faults are carried safely away and the system can clear them quickly. This is why the grounding elbow is the best choice for a fault-current rated grounding device.

The other options don’t fill that role. A portable feed-through bushing is mainly for bringing a conductor through a metal enclosure while maintaining insulation. A molded underground splice is focused on joining conductors, not providing a grounded fault path. A disconnect switch is for isolating circuits and isn’t intended to serve as the fault-current grounding device in URD terminations.