Hardware Description and Reference for Avaya ... - Avaya Support

Appendix A: Specifications for DEFINITY media gateways
If these grounds are not available, one of the following types of grounds can supplement the
water pipe ground:
● Other local metal underground systems or structures. Local underground structures such
as tanks and piping systems.
● Rod and pipe electrodes. A .63 inch (1.6 centimeter) solid rod or .75 inch (1.9 centimeter)
conduit or pipe electrode that is driven to a minimum depth of 8 feet (2.5 meters).
● Plate electrodes. Must have a minimum of 2 square feet (0.18 square meters) of metallic
surface exposed to the exterior soil.
The metal frame of the building, a concrete-encased ground, or a ground ring must supplement
a metallic underground water pipe.
Approved floor grounds
! WARNING:
WARNING: If you can only access the approved ground from within a dedicated power
equipment room, then a licensed electrician must make the connections.
Approved floor grounds are grounds on each floor of a high-rise building. These grounds can be
connected to the ground terminal in the riser closet and to the cabinet equipment that are
single-point ground terminals. Approved floor grounds might include the following grounds:
Note: You
● Building steel
● The grounding conductor for the secondary side of the power transformer that feeds the
floor
● Metallic water pipes
● Power feed metallic conduit that supplies panel boards on the floor
● A point that is specifically provided in the building design for grounding
Note:
must ensure that you electrically connect all protective grounds together to
form a single grounding electrode system.
Coupled bonding conductor
When you use a coupled bonding conductor (CBC) grounding in an AC-powered cabinet,
maintain a minimum space of 1 foot (0.3 meters) between the CBC power and other power and
ground leads.
In AC-powered systems, attach the single-point ground terminal block for the system on the AC
load or AC protector cabinet.
414 Hardware Description and Reference for Avaya Communication Manager