Cisco NCS 4000 Series Hardware Installation Manual page 60

NEBS Supplemental Unit Bonding and Grounding Guidelines
Figure 41: NEBS Bonding and Grounding Point on NCS 4009
1
To ensure a satisfactory supplemental ground connection to the chassis, use the following parts:
• One grounding lug, which has two M6 bolt holes with 0.625- to 0.75-inch (15.86- to 19.05-mm) spacing
between them, and a wire receptacle able to accept a 4-AWG or larger, multistrand copper wire. This
lug (part of the kit) is similar to those used for the DC input power supply leads.
• Two M6 round-head screws and two locking washers (nickel-plated brass is ideal).
Hardware Installation Guide for the Cisco NCS 4000 Series
58
NEBS grounding point on right of chassis
Installing Power Components