standards and guidelines for communication sites - Radio And ...
standards and guidelines for communication sites - Radio And ... standards and guidelines for communication sites - Radio And ...
SPECIAL GROUNDING (EARTHING) APPLICATIONS CHAPTER 4: EXTERNAL GROUNDING (EARTHING) STRUCTURE 1 FIGURE 4-60 BONDING TWO STRUCTURES ADJACENT TO THE TOWER 4.10.3 ACCESS POINT AND WIRELESS ROUTER GROUNDING (EARTHING) Access points, wireless routers, and similar equipment are typically installed in a variety of different locations. Such locations may be on communications towers, building rooftops, or utility light poles. These typical locations are addressed in this section. 4.10.3.1 TOWER MOUNTED Tower mounted access points and wireless routers shall be bonded to the tower using a 16 mm 2 csa (#6 AWG) or coarser, solid or stranded, tinned and/or jacketed, copper conductor. Connection to access points and wireless routers shall be made to an adequately-sized dedicated grounding (earthing) point in accordance with the device manufacturer requirements. Connection to the tower shall be made using tower manufacturer-approved methods (typically a type of mechanical clamp). The grounding conductor shall meet the specifications and installation requirements of “Grounding (Earthing) Conductors” on page 4-28. The tower shall be grounded as described in “Tower Grounding (Earthing)” on page 4-50. 4.10.3.2 BUILDING MOUNTED BURIED BARE CONDUCTOR 35 mm 2 (#2 AWG) OR COARSER TOWER TOWER GROUND RING STRUCTURE 2 Building mounted access points and wireless routers are typically mounted on the side of the building or on the roof of the building. Access points and wireless routers installed inside the building shall be grounded (earthed) as required for electronic equipment in Chapter 5, “Internal Grounding (Earthing)”. 4-84 68P81089E50-B 9/1/05
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES SPECIAL GROUNDING (EARTHING) APPLICATIONS 4.10.3.2.1 SIDE MOUNTED Access points and wireless routers mounted to the side of a building shall be bonded directly to the building's common grounding (earthing) electrode system using a 16 mm 2 csa (#6 AWG) or coarser, solid or stranded, copper conductor; grounding conductors installed partially below ground shall be 35 mm 2 csa (#2 AWG) or coarser. Connection to access points and wireless routers shall be made to an adequately-sized dedicated grounding point in accordance with the device manufacturer requirements. The grounding conductor shall meet the specifications and installation requirements of “Grounding (Earthing) Conductors” on page 4-28. 4.10.3.2.2 ROOF MOUNTED Access Points and Wireless Routers mounted on the roof a building shall be bonded directly to an available location of the building's common grounding (earthing) electrode system using 16 mm 2 csa (#6 AWG) or coarser, solid or stranded, copper conductor; grounding conductors installed partially below ground shall be 35 mm 2 csa (#2 AWG) or coarser. Connection to access points and wireless routers shall be made to an adequately-sized dedicated grounding point in accordance with the device manufacturer requirements. The grounding conductor shall meet the specifications and installation requirements of “Grounding (Earthing) Conductors” on page 4-28. An available location to the building's common grounding electrode system may include the following: • Effectively grounded structural building steel. • An existing communications grounding system. • An existing lightning protection system down-conductor. • A grounding down-conductor. • The device's AC power receptacle conduit when no other ground source is available or practical. When the AC power receptacle conduit is used, the effectiveness of its grounding/bonding connection shall be verified. 4.10.3.3 UTILITY POLE MOUNTED 4.10.3.3.1 METALLIC POLE MOUNTED Access points and wireless routers mounted to metallic utility poles are grounded (earthed) in the same manner as described above for tower-mounted units. Metallic utility pole-mounted access points and wireless routers shall be bonded to the metallic utility pole using a 16 mm 2 csa (#6 AWG) or coarser, solid or stranded, tinned and/or jacketed, copper conductor as shown in Figure 4-61. Connection to access points and wireless routers shall be made to an adequately-sized dedicated grounding point in accordance with the device manufacturer requirements. The grounding conductor shall meet the specifications and installation requirements of “Grounding (Earthing) Conductors” on page 4-28. Connection to the metallic utility pole shall be made using appropriate listed grounding hardware (typically a type of mechanical clamp). The metallic utility pole shall be effectively grounded or made to be effectively grounded. If the utility pole must be made effectively grounded, it shall minimally be grounded as described for a Type-A site in “Type “A” Site Grounding (Earthing)” on page 4-48. 68P81089E50-B 9/1/05 4-85
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STANDARDS AND GUIDELINES FOR COMMUNICATION SITES SPECIAL GROUNDING (EARTHING) APPLICATIONS<br />
4.10.3.2.1 SIDE MOUNTED<br />
Access points <strong>and</strong> wireless routers mounted to the side of a building shall be bonded directly to the<br />
building's common grounding (earthing) electrode system using a 16 mm 2 csa (#6 AWG) or coarser,<br />
solid or str<strong>and</strong>ed, copper conductor; grounding conductors installed partially below ground shall be<br />
35 mm 2 csa (#2 AWG) or coarser. Connection to access points <strong>and</strong> wireless routers shall be made to an<br />
adequately-sized dedicated grounding point in accordance with the device manufacturer requirements.<br />
The grounding conductor shall meet the specifications <strong>and</strong> installation requirements of “Grounding<br />
(Earthing) Conductors” on page 4-28.<br />
4.10.3.2.2 ROOF MOUNTED<br />
Access Points <strong>and</strong> Wireless Routers mounted on the roof a building shall be bonded directly to an<br />
available location of the building's common grounding (earthing) electrode system using 16 mm 2 csa<br />
(#6 AWG) or coarser, solid or str<strong>and</strong>ed, copper conductor; grounding conductors installed partially<br />
below ground shall be 35 mm 2 csa (#2 AWG) or coarser. Connection to access points <strong>and</strong> wireless<br />
routers shall be made to an adequately-sized dedicated grounding point in accordance with the device<br />
manufacturer requirements. The grounding conductor shall meet the specifications <strong>and</strong> installation<br />
requirements of “Grounding (Earthing) Conductors” on page 4-28.<br />
An available location to the building's common grounding electrode system may include the following:<br />
• Effectively grounded structural building steel.<br />
• An existing <strong>communication</strong>s grounding system.<br />
• An existing lightning protection system down-conductor.<br />
• A grounding down-conductor.<br />
• The device's AC power receptacle conduit when no other ground source is available or practical.<br />
When the AC power receptacle conduit is used, the effectiveness of its grounding/bonding<br />
connection shall be verified.<br />
4.10.3.3 UTILITY POLE MOUNTED<br />
4.10.3.3.1 METALLIC POLE MOUNTED<br />
Access points <strong>and</strong> wireless routers mounted to metallic utility poles are grounded (earthed) in the same<br />
manner as described above <strong>for</strong> tower-mounted units. Metallic utility pole-mounted access points <strong>and</strong><br />
wireless routers shall be bonded to the metallic utility pole using a 16 mm 2 csa (#6 AWG) or coarser,<br />
solid or str<strong>and</strong>ed, tinned <strong>and</strong>/or jacketed, copper conductor as shown in Figure 4-61. Connection to<br />
access points <strong>and</strong> wireless routers shall be made to an adequately-sized dedicated grounding point in<br />
accordance with the device manufacturer requirements. The grounding conductor shall meet the<br />
specifications <strong>and</strong> installation requirements of “Grounding (Earthing) Conductors” on page 4-28.<br />
Connection to the metallic utility pole shall be made using appropriate listed grounding hardware<br />
(typically a type of mechanical clamp).<br />
The metallic utility pole shall be effectively grounded or made to be effectively grounded. If the utility<br />
pole must be made effectively grounded, it shall minimally be grounded as described <strong>for</strong> a Type-A site<br />
in “Type “A” Site Grounding (Earthing)” on page 4-48.<br />
68P81089E50-B 9/1/05 4-85
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