The primary pad base plate for wireless power transfer equipment shall be connected to which circuit conductor?

The primary pad base plate for wireless power transfer equipment shall be connected to which circuit conductor?

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

Answer: (D)

Bonding the metal base plate to the equipment grounding conductor provides a safe, low-impedance path for any fault current, ensuring exposed metal parts stay at ground potential and the overcurrent device trips quickly. The equipment grounding conductor is specifically intended for safety bonding of electrical equipment, not for carrying normal current. Linking the base plate to a grounded (neutral) conductor would inappropriately place the plate in the normal current path and offer inadequate fault protection. Connecting to an ungrounded conductor would leave the plate floating and unsafe. A supply-side bonding jumper serves to connect bonding paths at the service equipment, but the direct, proper requirement for equipment safety is bonding to the equipment grounding conductor present with the circuit. Therefore, the correct choice is to connect the primary pad base plate to the equipment grounding conductor.

Bonding the metal base plate to the equipment grounding conductor provides a safe, low-impedance path for any fault current, ensuring exposed metal parts stay at ground potential and the overcurrent device trips quickly. The equipment grounding conductor is specifically intended for safety bonding of electrical equipment, not for carrying normal current. Linking the base plate to a grounded (neutral) conductor would inappropriately place the plate in the normal current path and offer inadequate fault protection. Connecting to an ungrounded conductor would leave the plate floating and unsafe. A supply-side bonding jumper serves to connect bonding paths at the service equipment, but the direct, proper requirement for equipment safety is bonding to the equipment grounding conductor present with the circuit. Therefore, the correct choice is to connect the primary pad base plate to the equipment grounding conductor.