standards and guidelines for communication sites - Radio And ...

STANDARDS AND GUIDELINES FOR COMMUNICATION SITES MINIMUM SITE GROUNDING (EARTHING) REQUIREMENTS
The fencing system for a nearby installed fence at a communications site shall be grounded/bonded as
follows:
• Each corner fence post shall be bonded to the nearest location of the building ground ring using
35 mm 2 csa (#2 AWG) or coarser, bare, solid or stranded, tinned, copper conductors. The
grounding conductors shall be buried to the same depth as the building ground ring, wherever
practical. See ANSI T1.313-2003, figure 3(a).
• The fence fabric near each corner bonding point shall also be bonded to the building ground ring.
This bond may be made using the same grounding conductor used for the corner fence post, or by
bonding directly to the fence post using approved methods described within this chapter. The fence
fabric bond should be made in at least three points down the fence fabric as shown in Figure 4-49
(MIL-HDBK-419A Volume II, section 1.12).
DETERRENT WIRE GROUNDING CLAMP
EXOTHERMIC WELD CONNECTION
FENCE FABRIC GROUNDING CLAMP
(1 OF 3)
SOFT DRAWN TINNED SOLID COPPER
CONDUCTOR BONDING FENCE
FABRIC TO GROUND CONDUCTOR
GATE JUMPER WITH EXOTHERMIC WELD
GROUND CONDUCTOR WITH
EXOTHERMIC WELD
CONNECT FENCE BONDING CONDUCTOR
TO EXTERNAL GROUNDING ELECTRODE
SYSTEM USING EXOTHERMIC WELD OR
IRREVERSIBLE HIGH-COMPRESSION
FITTING
FIGURE 4-49 FENCE FABRIC AND DETERRENT WIRING BONDING EXAMPLE
68P81089E50-B 9/1/05 4-69