b. You can bond the grounding system to the box with a grounding screw, but this screw can
have no other purpose than to hold the ground conductor to the box (Figure 2-9, page 2-9).
c. Another method is to use a grounding clip (Figure 2-11). The grounding clip slides over the
box and the ground conductor. The ground conductor fits in the groove of the grounding clip, and the
grounding clip holds the ground conductor securely to the metal box.
Figure 2-11. Grounding clip holding the ground conductor
d. To avoid installing ground conductors incorrectly, remember these important points:
Do not bond more than one ground conductor to a box. Twist ground conductors together
and bond them to the box as one.
Do not place two ground conductors under one screw. Twist ground conductors together and
place them under the screw as one.
Do not use the internal clamp screw to hold the ground conductor to the box. This screw is
being used to hold the cable clamp and should not be used to hold the ground conductor.
EN5144
2-10
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