Tadiran Telecom Coral IPx 800 Series, Инструкция по установке и справочник по аппаратной части, Страница: 57 / 400

Hardware Installation Procedure
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Proper system grounding is critical for reliable system operation. System grounding is
only as effective as the ground point itself. To ensure adequate protection from
interference by radio frequency energy, electrical impulse noise, and lightening or
power line surge, the building electrical ground point must comply with grounding
recommendations of the National Area Code, Article 800, and/or applicable, local
building and electrical codes.
The purpose of ground circuit design is to establish a low resistance path to the earth,
and conduct a number of currents in such a way as to minimize the interaction of any
two or more currents. The ground connection is used as a common conductor for
many circuits: some carrying wanted signals, and others carrying unwanted signals.
The same ground that carries small networking currents must also carry unwanted
radio frequency energy, impulse noise, and lightening surges that might otherwise
interfere with system operation.
The ground terminal includes an M4 threaded terminal pole that is fixed to the bottom
right corner on the rear side of the cage (by the manufacturer), a serrated washer, a flat
washer, and an M4 nut.
The cage ground wire is connected to the cage at the rear bottom right corner, as
described on
page 2-18, Connecting the Ground Wire to the Cage
.
3 Ground Wiring
Electrical Hazard. Incorrect ground wire connections to the system can cause shock,
burn, or death.
•Verify that the ground wires are 10 AWG stranded conductor.
•Verify that all cage ground connections are made directly from the cage ground
connection to the master ground.
•Do not interconnect cage ground terminals between Coral IPx cages.
•Ring terminals retain wires onto the terminal lug when the connection is loosened.
Verify that all ground wires include ring terminals at both ends.
•Connect only a Protective Earth (PE) to the Coral IPx system.
Do not connect a separate Telecommunications Reference Conductor (TRC).
•Resistance from the master ground to the building electrical ground should never
exceed 1.0 ohm. The master ground bar should be located in the switching room as
close as possible to the Coral system. Any ground connection of equipment related to
the switching Coral system should ultimately connect to the master ground.