UFC 3 -520-01
June 10, 2002
10-4.3.4.4 Bond each TGB to building structural steel or other permanent metallic
systems, if close and accessible.
10-4.3.4.5 Install a communications sur ge protector near the TMGB. Typically, the
TMGB is installed adjacent to the surge protector and serves as the path to ground for
surges diverted by the protector.
10-4.3.5 Refer to the Building Industry Consulting Service International (BICSI)
bonding and grounding .
10-5
LIGHTNING PROTECTION .
10-5.1
In the context of this manual, lightning protection consists of the facility design
features intended to withstand direct lightning strikes and then channel the lightning
surge to ground.
10-5.2
For the Army and Navy, refer to NFPA 780, Standard for the Installation of
Lightning Protection Systems, criteria for lightning protection systems.
10-5.3
For the Air Force, refer to AFI 32 -1065 and NFPA 780 for lightning protection
systems.
10-5.2
Surge protection is intended to protect facility electrical equipment from
lightning-induced or other s urges once they enter the facility through the power system
or other electrical connection. Refer to Chapter 11 for surge protection guidance.
10-6
INFORMATION SOURCES. The following references provide additional
information on the subject of grounding.
10-6.1
AFI 32-1065--establishes Air Force requirements for grounding systems,
other industry documents as well as MIL -HDBK-419A, Grounding, Bonding, and
Shielding fo r Electronic Equipment and Facilities.
10-6.2
NFPA 70, NEC--provides the minimum safety requirements related to
grounding systems. Article 250 provides the requirements related to electrical power
circuits and low voltage control and signaling circuits. Article 800 provides additional
guidance related to communications systems.
10-6.3
NFPA 77--provides NFPA requirements related to static grounding and
bonding requirements.
10-6.4
NFPA 780--provides NFPA requirements for lightning protection systems.
This is the industry standard for lightning protection.
10-5
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