TelcoBridges 800 1+1 series, Руководство по установке

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17
Installing the Equipment
2.4.4 Grounding the Equipment Chassis
As a standard safety practice, the chassis of the 800 series gateway must be properly grounded to
protect against any contact with an electrical fault condition. It is recommended that the chassis be
connected to an earth ground. When the 800 series gateway is installed in an equipment rack, connect
the ground wire between the ground lug of the gateway and the equipment rack ground bar. If more
than one 800 series gateway is installed in an equipment rack, each 800 series gateway must be
grounded directly to the equipment rack ground bar.
Guidelines
• Use 10 AWG (minimum) stranded ground wire.
• Terminate equipment side of ground wire with a #10 ring terminal.
• Keep the length of the ground wire as short as possible.
• Do NOT daisy chain the ground between equipment. Use a ground bus bar, as show in figure 2.5
on page 17.
• Do not over tighten ground lug connections.
To connect the 800 series gateway to ground:
1. Connect one end of a ground wire to the ground lug of the 800 series gateway. See figure 2.5 on
page 17.
2. Connect the other end of the ground wire to a ground bar of the equipment rack. If the 800 series
gateway is not installed in an equipment rack, connect the ground wire to earth ground. In the case
of DC powered units, connect an additional ground wire from the chassis ground terminal of each
DC supply.
3. Verify that the resistance of the ground path is less than 0.5 ohms.
Figure 2.5 Ground Connection
Earth
Ground
Ground Bar
15 14 13 12
10 11 8 9 3 2 0
7 6 5 4
1
MGMT0
MGMT1
ETH0
ETH1
VOIP0
VOIP1
15 14 13 12
10 11 8 9 3 2 0
7 6 5 4
1
MGMT0
MGMT1
ETH0
ETH1
VOIP0
VOIP1
15 14
13 12
10 11 8 9 3 2 0
7 6 5 4
1
MGMT0
MGMT1
ETH0
ETH1
VOIP0
VOIP1