Approved Grounds - Avaya DEFINITY ONE Installation And Upgrades

Installation and Upgrades for DEFINITY ONE and
IP600 Internet Protocol Release 10 555-233-109
1 Install and Cable the Cabinet
Check AC power and ground for DEFINITY ONE
To check AC power:
1. Measure the AC voltage between the hot and neutral sides of the
receptacle.
2. Depending on the AC power source, verify that the meter reads 90 to 132
VAC or 180 to 264 VAC. If not, have a qualified electrician correct the
problem.
3. Measure the voltage between the neutral and ground sides of the
receptacle.
4. Verify that the meter reads 0 VAC. If not, have a qualified electrician correct
the problem.
5. When finished, set the AC main circuit breakers to OFF .

Approved grounds

An approved ground is the closest acceptable medium for grounding the building
entrance protector, entrance cable shield, or single-point ground of electronic
telephony equipment. If more than one type of approved ground is available on
the premises, the grounds must be bonded together as required in Section 250-81
of the National Electrical Code.
Grounded Building Steel — The metal frame of the building where it is
effectively grounded by 1 of the following grounds: acceptable metallic water pipe,
concrete encased ground, or a ground ring.
Acceptable Water Pipe — A metal underground water pipe, at least 1/2 inch (1.3
cm) in diameter, in direct contact with the earth for at least 10 feet (3 m). 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 1 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-inch (1.6-cm) solid rod or 3/4-inch (2-cm)
conduit or pipe electrode driven to a minimum depth of 8 feet (2.4 m)
Plate electrodes — Must have a minimum of 2 square feet
(0.185 square m) of metallic surface exposed to the exterior soil
Concrete Encased Ground — An electrode encased by at least 2 inches
(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 feet (6.1 m) of 1 or more steel reinforcing bars or rods 1/2-inch (1.3 cm) in
diameter, or at least 20 feet (6.1 m) of bare, solid copper, 4 AWG (26 mm
Issue 6
December 2001
1-65
2
) wire.