Tadiran Telecom Coral Sentinel Pro, Installation Procedure And Reference Manual, Page: 36 / 72

26 Hardware Installation Sentinel Pro Installation Procedure and Reference Manual - for Coral IPx / FlexiCom
Se
nt
inel
Pro Ground Wiring (fo
r Rack-mounted Units)
4
Connecting the Ground Wire to the Sentinel Pro Cage
The ground connection includes an M4 threaded terminal pole that is fixed onto the
surface of the rear panel (by the manufacturer), a serrated washer, a flat washer, and a
hexagonal M4 nut assembled on the terminal connection (
Figure 14 ).
Electrical Hazard. Incorrect ground wire connections to the system can cause shock,
burn, or death.

Verify that the ground wires are 10 AWG stranded conductor.

Verify that all ground connections are made directly from the cage ground connection to the
master ground.

Do not interconnect cage ground terminals between the Coral units.

Ring terminals retain wires onto the terminal lug when the connection is loosened. Verify
that all ground wires include ring terminals at both ends.

Connect only a Protective Earth (PE) to the Coral or UCx system.

Do not connect a separate Telecommunications Reference Conductor (TRC).

Resistance from the master ground to the building electrical ground should never exceed
1.0 ohm. The master ground bar should be located in the switching room as close as
possible to the PBX system. Any ground connection of equipment related to the switching
PBX system should ultimately connect to the master ground.