 |
For field-wiring connections, use copper conductors only. For other electrical safety information, see Electrical Safety Guidelines and Warnings. |
To ground a DC-powered router, connect a grounding cable to earth ground and then attach it to one of the chassis grounding points on the upper rear edge of the chassis. To supply power to the router, connect power cables to a separate, dedicated DC power source for each power supply and attach the cables to the quick connect terminals on each power supply. Most sites distribute DC power through a main conduit that leads to frame-mounted DC power distribution panels, one of which might be located at the top of the rack that houses the router. A pair of cables (one input and one return) connects the quick connect terminals to the power distribution panel.
Table 11 summarizes the specifications for the grounding and power cables, which you supply.
Table 11: DC Power and Grounding Cable Specifications
|
Cable Type |
Quantity and Specification |
Maximum Equal Length |
|---|---|---|
|
Power |
Two 12-AWG (3.33 mm2) single-strand-count wire cables |
None |
|
Grounding |
One 12-AWG (3.33 mm2) single-strand-count wire cable |
None |
|
For field-wiring connections, use copper conductors only. For other electrical safety information, see Electrical Safety Guidelines and Warnings. |
Figure 19shows how to attach the grounding and power cables. The grounding cable attaches to one of the grounding points on the upper edge of the router rear panel. The accessory box shipped with the router contains the lug used to secure the grounding cable the grounding point. The power cables insert into the quick connect terminals located on each power supply— the input terminal is labeled -48V and the return terminal is labeled RTN.
 |
Before router installation begins, a licensed electrician must attach the cable lug to the grounding cable that you supply. A cable with an incorrectly attached lug can damage the router (for example, by causing a short circuit). |
Figure 19: DC Power and Grounding Cable Connections
For information about the DC power supply, including electrical specifications and a description of components, see DC Power Supply. For instructions on connecting the DC power and grounding cables during initial installation, see Connect Power to a DC-Powered Router. For instructions on replacing the cables on an operating router, see Disconnect and Connect DC Power.
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Power cords and cables must not block access to router components or drape where people could trip on them. |
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