11990-190/192
Shelf Ground Connection
16
R1.0, October 2018
5 Shelf Ground Connection
The shelf ground cable can be connected at the left rear bottom side. For two
hole lugs with 1“ spacing, an adapter kit is available, order no:
21990-413
Figure 10: Shelf ground terminal with adapter kit
5.1 Specification for the Shelf Ground connection cable
Minimum recommended wire size:
AWG3/0 conductor.
Recommended two hole lugs with 1“ spacing for AWG 3/0:
Burndy YAZ272TC38
Burndy YAZ272TC3845 (45°)
Burndy YAZ272TC3890 (90°)
Torque for Bolts M6: 5.1 Nm (45 in.-lb.)
Torque for Bolts M8: 12.6 Nm (111 in.-lb.)
Hazardous voltage!
Before powering-up the Shelf, make sure that the Shelf Ground terminal is
connected to Protective Earth (PE) of the building.
Please note, that in a typical telecom environment, the VRTN path of the -48 V
supply is grounded to Protective Earth (PE) of the building.
12712817
1
Shelf Ground Terminal
3
Additional fixing point (M6)
2
ESD Terminal
4
Adapter plate
