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Head Office
Suite 202, The Colonnade Building, 27 Nguyen Trung Truc St.,
District 1, Hochiminh City, Vietnam
Tel: 84.8 823-1693 Fax: 84.8 823-1665

Hanoi Office
A11, 3/Fl., Horizon Hotel, 40 Cat Linh St.,
Dong Da District, Hanoi, Vietnam
Tel: 84.4 736-7055 Fax: 84.4 733-2470
Website: www.qd-tek.com.vn
Email:
ANSI/TIA/EIA 607 Commercial Building Grounding and Bonding Requirements for Telecommunications

Quang Dung Technology Distribution Company Page 2 of 7
Table of ContentsOVERVIEW

COMPONENTS OF THE TELECOMMUNICATIONS GROUNDING AND BONDING
INFRASTRUCTURE

Identification Elements
Bonding Conductors for Telecommunications

Telecommunications Bonding Backbone (TBB)

COMPONENTS OF THE TELECOMMUNICATIONS GROUNDING AND
BONDING INFRASTRUCTURE
Major components of the grounding and bonding infrastructure are:

• the identification elements

• the bonding conductor for telecommunications

• the Telecommunications Bonding Backbone (TBB)

• the Telecommunications Main Grounding Busbar (TMGB)

• the Telecommunications Grounding Busbar (TGB)

• the Telecommunications Bonding Backbone Interconnecting Bonding
Conductor (TBBIBC)

All bonding conductors shall:

• be listed for the purpose intended and approved by a Nationally Recognized
Testing Laboratory (NRTL).

• be insulated and copper. The minimum bonding conductor size shall be a No. 6
AWG.

• be bonded to each end of the conduit with a No. 6 AWG ground wire at a
minimum if the conductors are inserted in a metallic conduit longer than 1 m
(3ft)


The TBB is a conductor:

• that interconnects all TGBs with the TMGB

• reduces or equalizes potential differences between telecommunications
systems bonded to it.

A TBB is not intended to serve as the only conductor providing a ground fault current
return path.

A TBB(s) originates at the TMGB, and connects to the TGB(s) in all
telecommunications closets and equipment rooms.

A TBB design should take into account:

• type of building construction, building size

• the telecommunications requirements

• the configuration of the telecommunications pathways and spaces.

the TBB shall:

• be designed with over all design of the telecommunications backbone cabling
system in mind

• permit multiple TBBs as required

• minimize the lengths of the TBBs


• shall have joints adequately supported and protected from damage

ANSI/TIA/EIA 607 Commercial Building Grounding and Bonding Requirements for Telecommunications

Quang Dung Technology Distribution Company Page 5 of 7

The Telecommunications Main Grounding Busbar (TMGB)

The TMBG serves as:

• the dedicated extension of the building grounding electrode system for the
telecommunications infrasfructure

• the central attachment point for telecommunications bonding backbones
(TBB) and equipment, and is located such that it is accessible to
telecommunications personnel

The TMGB should:

• be located in the telecommunications entrance room

• minimize the bonding conductor length for telecommunications

• serve telecommunications equipment that is located within the same room or
space.


connections, or equivalent for the bonding conductor connections

• be bonded to all metallic raceways used for telecommunications cable within
the same room or space

• be insulated from its support (50mm is recommended)

The TMGB should:

• be located to the side of the panelboard

• be located vertically based on the entrance point of the cables (eg: overhead
or from below)

• use 2 hole compression connectors