For wireless power transfer equipment, the primary pad base plate shall be of a nonferrous metal and shall be connected to the circuit ___.

• A. Ungrounded conductor
• B. Grounded conductor
• C. Equipment grounding conductor
• D. Supply-side bonding jumper

Answer: (C)

The safety principle is bonding all noncurrent-carrying metal parts to the system grounding path so that any fault current has a low-impedance route to ground and trips the protective device quickly. The primary pad base plate is a metallic surface that could become energized if insulation failed, so it should be connected to the equipment grounding conductor. This provides a reliable path to ground and helps keep the exposed surface at earth potential, reducing shock risk.

The other options don’t provide that protective ground path: an ungrounded conductor would leave the plate potentially live; a grounded conductor is the neutral and not used as the protective ground for equipment; and a supply-side bonding jumper is meant to bond the service equipment to the grounding electrode system, not to bond a specific piece of equipment.