Site Building And Equipment Grounding - Motorola iDEN Site Controller System Manual

Chapter 3 Pre-Installation
Grounding Requirements

Site Building and Equipment Grounding

! WARNING !
3-16
On stand-alone site buildings, a PVC (typically 3/4") conduit must be
provided for the interior ground wire to exit the building. For site buildings
with floors at ground level, the conduit must exit a side wall at a 45˚ angle or
less. For buildings with space below the floors for a ground connection, the
conduit may exit through the floor. In both cases, the location of the opening
should be close to the master ground bar inside the building.
Use of metal conduit is discouraged as the conduit provides inductance to a
surge, raising the impedance of the ground. If metal conduit is required by
local building codes, both ends of the conduit must be bonded to the ground
wire through the use of grounding clips or other suitable means to eliminate
the inductance of the conduit.
Cabinet Grounding
Within the site, ground the cabinets with a single dedicated connection
between each cabinet and the master ground bar. The connecting wire must
be a #2 AWG green-insulated copper wire.
Use appropriate lugs (and split ring lock washers when possible) with an
anti-oxidant grease applied for interior grounding connections and exterior
secondary grounding connections. If lock washers are used, they should be
placed between the nut and the lug to ensure the mechanical integrity of the
connection. The washer must not be secured between the lug and the surface
to which it is connected. Painted connections must be scraped clean before
applying the anti-oxidant grease and lug.
NEVER USE A BARE OR DAMAGED WIRE FOR THE
CONNECTION OF CHASSIS GROUND OR OTHER
ELECTRICAL WIRING TO PREVENT DAMAGE TO
EQUIPMENT OR POTENTIAL INJURY TO
PERSONNEL.
The Control Cabinet (Rack Ground Bus) must be connected to the
Note:
site ground using a single dedicated ground wire. Refer to the EBTS
System Manual (68P81099E10) for RF Cabinet grounding.
Gen 3 Site Controller System Manual
WARNING
!
68P80801E30-A 5/1/2002