Code Quiz of Day

Bonding Screw Identification

March 14, 2014

Means of identification for bonding screw used as sole means of attachment

Where a main bonding jumper is a screw only, the screw shall be identified by a(n) _____ that shall be visible with the screw installed.

a) silver or white finish
b) green finish
c) etched ground symbol
d) hexagonal shaped head

See answer and applicable Code reference

The correct answer is: b) green finish

Section 250.28 of the 2011 NEC focuses on the main bonding and system bonding jumper requirements. As noted in 250.28(B), "where a main bonding jumper or a system bonding jumper is a screw only, the screw shall be identified with a green finish that shall be visible with the screw installed."

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