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

Chapter 5. Internal Grounding (Earthing) ..................................................... 5-1
5.1 Introduction ................................................................................................................................. 5-1
5.2 Common Grounding (Earthing) ................................................................................................... 5-3
5.3 Grounding (Earthing) System Components and Installation Requirements ............................... 5-4
5.3.1 Master Ground (Earth) Bus Bar .......................................................................................... 5-9
5.3.2 Sub System Ground (Earth) Bus Bar ............................................................................... 5-15
5.3.3 Rack Ground (Earth) Bus Bar .......................................................................................... 5-20
5.3.4 Grounding (Earthing) Conductors .................................................................................... 5-20
5.3.5 Ground (Earth) Bus Conductors ....................................................................................... 5-24
5.3.6 Communication Bonding Backbone Conductor and Grounding (Earthing)
Equalizer Conductors .............................................................................................................. 5-25
5.3.7 Internal Perimeter Ground (Earth) Bus Conductors ......................................................... 5-28
5.3.8 Equipment Grounding (Earthing) Conductors .................................................................. 5-29
5.3.9 Bonding Jumpers ............................................................................................................. 5-30
5.4 Connection Methods for Internal Grounding (Earthing) System ............................................... 5-31
5.4.1 General Bonding Requirements ....................................................................................... 5-31
5.4.2 Bonding to Equipment and Ancillary Support Apparatus ................................................. 5-34
5.4.3 Bonding to the MGB, SSGB And RGB ............................................................................. 5-36
5.4.4 Bonding to Ground (Earth) Bus Conductors ..................................................................... 5-38
5.4.5 Bonding to Communication Bonding Backbone Conductors and Grounding
(Earthing) Equalizer Conductors ............................................................................................. 5-39
5.5 Bonding Equipment to Internal Grounding (Earthing) System .................................................. 5-40
5.5.1 Equipment and Ancillary Support Apparatus Bonding ..................................................... 5-41
5.6 Grounding (Earthing) for Stand-alone Equipment Shelters ...................................................... 5-54
5.6.1 Installation Requirements for Stand-Alone Shelters ......................................................... 5-55
5.7 Grounding (Earthing) for Small, Large, and Multi-Story Buildings ............................................ 5-58
5.7.1 Establishing a Communication Grounding (Earthing) System ......................................... 5-58
5.7.2 Specifications for Conductors ........................................................................................... 5-59
5.7.3 Bonding Connections for the MGB ................................................................................... 5-60
5.7.4 Bonding Connections for the SSGB ................................................................................. 5-60
5.7.5 Items to be Bonded to the Internal Ground (Earth) System ............................................. 5-61
5.8 Grounding (Earthing) for Dispatch Centers and Network Operator Positions .......................... 5-62
5.8.1 Grounding (Earthing) and Protection of Incoming Power and
Telecommunication Cables ..................................................................................................... 5-63
5.8.2 Grounding (Earthing) of Equipment Rooms Located Within the Dispatch Center ............ 5-63
5.8.3 Grounding (Earthing) and Protection of Network Operator Positions and Work Areas .... 5-64
5.9 Grounding (Earthing) for Integrated Communication Sites ....................................................... 5-68
IV 68P81089E50-B 9/1/05