Sizing the Supply-Side Bonding Jumper

The supply-side bonding jumper on the supply side of services shall be sized according to the _____.

a) overcurrent device rating
b) ungrounded supply conductor size
c) service drop size
d) load to be served

See answer and applicable Code reference

The correct answer is: b) ungrounded supply conductor size

Section 250.102 of the 2011 NEC covers the requirements for bonding conductors and jumpers. As noted in 250.102(C)(1), "The supply

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