Avaya S8300 - Manual (Page 118)

Hardware installation for the G700 Media Gateway and S8300 Media Server
118 Installing and Upgrading the Avaya G700 Media Gateway and Avaya S8300 Media Server
● Acceptable water pipe
A metal underground water pipe, at least 1/2-in. (1.3 cm) in diameter, in direct contact with
the earth for at least 10 ft. (3m). The pipe must be electrically continuous (or made
electrically continuous by bonding around insulated joints, plastic pipe, or plastic water
meters) to the point where the protector ground wire connects. A metallic underground
water pipe 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 — 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
2
) wire.
● 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
2
), 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
- 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
- Grounding point specifically provided in the building for that purpose
!
WARNING:
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.