Connect The Safety Ground - Avaya G700 Installation And Upgrades

2 Installing Hardware for the G700 Media Gateway and S8300 Media Server: Installation and Cabling
must be supplemented by the metal frame of the building, a concrete-encased ground, or a ground
ring. If these grounds are not available, the water pipe ground can be supplemented by one of the
following types of grounds:
- Other local metal underground systems or structures - Local underground structures such as
tanks and piping systems.
- Rod and pipe electrodes - A 5/8-in. (1.6 cm) solid rod or 3/4-in. (2 cm) conduit or pipe
electrode driven to a minimum depth of 8 ft. (2.4 m).
- Plate electrodes - Must have a minimum of 2 sq. ft. (0.185 sq. m) of metallic surface exposed
to the exterior soil.
• Concrete Encased Ground: An electrode encased by at least 2 in. (5.1 cm) of concrete and located
within and near the bottom of a concrete foundation or footing in direct contact with the earth. The
electrode must be at least 20 ft. (6.1 m) of one or more steel reinforcing bars or rods, 1/2-in. (1.3
cm) in diameter, or at least 20 ft. (6.1 m) of bare solid copper, 4 AWG (26mm
• 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 mm
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 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.
Installation and Upgrades for G700 with S8300 or S8700
555-234-100 — Issue 3 — May 2003
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