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The Calix E7-20 ground system can be connected to a Common Bonding Network (CBN) or
Isolated Bonding Network (IBN).
Note: For environments that employ an IBN scheme, the low voltage and frame grounds on
the E7-20 shelf are isolated from the input power DC-return.
The installation kit includes a 12-foot ground cable, plus hardware to attach it to the E7-20
frame ground. The grounding terminal for anti-static wrist strap connection is located on the
left side of the chassis.
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9A! Get the ground cable and supplied hardware (pair of 10-32 Keps nuts and washers) from
*A! Connect the ground cable to the E7-20 chassis as follows:
a.! Install (2) star washers and then the ground cable's 2-hole lug onto the dual-post
Frame Ground terminal (located on the rear of the chassis).
b.! Install (2) 10-32 Keps nuts onto the Frame Ground posts to secure the lug in place.
Tighten to 27 in-lbs of torque.
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