Download Bonding to the External Grounding (Earthing)

MINIMUM SITE GROUNDING (EARTHING) REQUIREMENTS
4.7.6.3
CHAPTER 4: EXTERNAL GROUNDING (EARTHING)
WOODEN STRUCTURES (POLES)
Wooden pole structure towers (and other non-metallic towers) shall minimally be grounded (earthed) as
follows:
•
The wooden pole shall have a vertical grounding conductor installed over the length of the wooden
pole.
•
The vertical grounding conductor shall be constructed of 35 mm2 csa (#2 AWG) or coarser solid,
bare, tinned or un-tinned copper conductor (ANSI T1.334-2002, section 6.5).
•
The grounding conductor shall be installed in accordance with “Grounding (Earthing)
Conductors” on page 4-28.
•
The vertical grounding conductor shall terminate into a radial grounding conductor or tower
ground ring (with rods) (ANSI T1.334-2002, section 6.5).
•
•
The radial grounding conductor shall be installed in accordance with “Radial (Counterpoise)
Grounding Conductors” on page 4-24.
•
The tower ground ring shall be installed in accordance with “External Building and Tower
Ground Ring” on page 4-22.
•
Ground rods shall meet the specifications and be installed in accordance with “Ground
Rods” on page 4-11.
The wooden pole grounding electrode system shall be bonded to the building grounding electrode
system. See “Common Grounding (Earthing)” on page 4-5.
ANTENNA
WOODEN POLE
35 mm2 csa (#2 AWG) OR
COARSER BARE COPPER
CONDUCTOR ROUTED ON
OPPOSITE SIDE FROM
TRANSMISSION LINE
GROUND KITS
TRANSMISSION LINE
TO SHELTER
GROUND RODS
GRADE
FIGURE 4-39 WOODEN POLE GROUNDING
4-58
68P81 089E50 -B
9/1 /05