Which component serves as the wiring device's primary ground-fault return path?

• A. Receptacle contacts
• B. Mounting strap
• C. Faceplate
• D. Terminal block

Answer: (B)

Grounding relies on a solid bonding path from the device to the grounding conductor so fault current can return safely to the source and trip the breaker. The mounting strap provides that bond between the device and the metal electrical box, and through to the equipment grounding conductor. Because it ties the device to the grounding system, it serves as the primary ground-fault return path for fault current.

The other parts don’t perform this role: receptacle contacts are for normal hot-to-neutral connections, the faceplate is mostly nonconductive, and the terminal block is where conductors connect for normal operation but isn’t the dedicated ground path unless specifically bonded through the grounding screw and strap.