• Subject to service interruptions
NFPA 70: NEC
In buildings without a ground-cabling infrastructure meeting TIA-607 the Avaya equipment shall be
grounded by connection to the nearest accessible location on one of the following approved
building grounds:
Note:
The following are approved grounds in keeping with the NFPA 70: National Electrical Code of
the United States (NEC). For additional information regarding these grounds consult the NEC,
Article 250.52.
AC Service Panel:
• AC ground at the AC service panel serving the Avaya equipment.
Danger:
• Do not perform work inside electrical panels unless you are a qualified electrician.
• Do not try to remove bonding conductors without approval from qualified personnel.
Metal Water Pipe:
The water pipe must meet all the following –
• The entire length of the pipe must be visible – except for short sections passing through
walls, ceilings, etc.
• Be metallic thorough its length, or made electrically continuous by bonding around insulation
joints or insulating pipe.
• Be routed underground for at least 3 meters (10 feet).
Where a metal water pipe is used as an approved ground the following requirements apply to the
host building:
• The building must be industrial, commercial, or institutional, where only qualified persons
service the water piping.
• The building shall not rely only on the metal water pipe for grounding: a supplemental ground
is required. (See NEC Article 250.53 for additional details.)
Metal Frame of the Building:
The metal frame member (I-beam, pillar) must be connected to earth by one of the following
methods –
• Be in direct contact with the earth, or encased in concrete that is in direct contact with the
earth, for at least 3 meters (10 feet).
• Be connected to the reinforcing bars of a concrete-encased electrode. The electrode must be
encased by at least 5.1 cm (2 inches) 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
6.1 meters (20 feet) of one or more steel reinforcing bars or rods, 1.3 cm (0.5 inches) in
diameter, or at least 6.1 meters (20 feet) of bare solid copper, 4 AWG (26mm
2
) wire.
• Be connected to a ground ring. A ground ring is a buried ground that encircles a building,
having a length of at least 6.1 meters (20 feet) of 2 AWG (35mm
2
) bare copper wire.
Ground conductor attachments
July 2018 Deploying and Upgrading Avaya G430 Branch Gateway 37
Comments on this document? infodev@avaya.com
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