2Installing Hardware for the G700 Media Gateway and S8300 Media Server
Installation and Cabling
94 Installation and Upgrades for G700 and S8300
December 2003
•Ground Ring: A buried ground that encircles a building or structure at a depth of at least 2.5 ft
(0.76 m) below the earth’s surface. The ground ring must be at least 20 ft. (6.1 m) of 2 AWG (35
mm2), bare copper wire.
•Approved Floor Grounds: Floor grounds are those grounds on each floor of a high-rise building
that are suitable for connection to the ground terminal in the riser closet and to the cabinet single-
point ground terminal. Approved floor grounds may include the following:
— Building steel
— The grounding conductor for the secondary side of the power transformer feeding the
floor
— Metallic water pipes.
— Power-feed metallic conduit supplying panel boards on the floor.
— A grounding point specifically provided in the building for that purpose.
!
WARNING:
If the approved ground or approved floor ground can only be accessed inside a
dedicated power equipment room, then connections to this ground must be made by
a licensed electrician.
Connect the Safety Ground
Proper grounding of the G700 Media Gateway installation safeguards the system, users and service
personnel by providing protection from lightning, power surges, AC mains faults, power crosses on
central office trunks, and electrostatic discharge (ESD).
Local electrical installation codes must be followed when installing G700 Media Gateways.
!
WARNING:
Connection of both grounds (through the AC or DC Power Cord and the
Supplementary Ground Conductor) is required for safe operation of the G700 Media
Gateway.
!
WARNING:
An improper ground can cause electrical shock as well as equipment failures and
service outages.
Attach the Ground Wires
1 Remove the ground screw on the rear of the chassis adjacent to the ground symbol:
2Place the ring terminal of the 10 AWG (4.0 mm2) Supplementary Ground Conductor on the screw.
3Replace the ground screw to the chassis and securely tighten the screw such that it cannot be
loosened without the use of a tool.
If the ground block has been purchased: The ground block is provided for use with more than
one G700 (or other Cajun devices) in the rac k. It is usually mounted by the customer electrician.