Methods of Bonding at the Service

Bonding jumpers for service raceways shall be used around impaired connections such as ______.

a) oversized concentric knockouts
b) oversized eccentric knockouts
c) reducing washers
d) any of the above

See answer and applicable Code reference

The correct answer is: d) any of the above

Article 250 covers the general requirements for grounding and bonding. Bonding requirements are specifically outlined in Part V of this Article. As per the first sentence of Sec. 250.92(B), "Bonding jumpers meeting the requirements of this Article shall be used around impaired connections, such as reducing washers or oversized, concentric, or eccentric knockouts."

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