Preparing for Router Installation
Table 17: DC Power and Grounding Cable Specifications
Cable Type
Quantity and Specification
Maximum
Equal Length
Power
Eight 4-AWG (16 mm2) wires, minimum, or as permitted
by the local code
None
Grounding
One 8-AWG (8.4 mm2) wire, minimum, or as permitted
by the local code
None
WARNING:
For field-wiring connections, use copper conductors only.
For other electrical safety information, see “Electrical Safety Guidelines and
Warnings” on page 227.
CAUTION:
Power cords and cables must not block access to router components or
drape where people could trip on them.
Figure 30 shows how to attach the power cables. The power cables attach
to the 1/4–20 UNC terminal studs located on the circuit breaker box—
the input set of studs is labeled
–48V
and the return set is labeled
RTN(+)
.
The nuts and locking washers used to secure the power cable lugs on
the terminal studs are preinstalled on the studs.
The tool for loosening or tightening the nuts on the terminal studs is a
7/16-in. hexagonal-head external drive socket wrench, or nut driver, with
a minimum of 30 lb-in. (3.5 Nm) tightening torque.
CAUTION:
Do not substitute a metric nut driver or wrench. A tool that does not fit
the nuts exactly can damage them. If a 7/16-in. tool is not available, use pliers or
an adjustable wrench.
Power Guidelines, Requirements, and Specifications
69
Summary of Contents for Internet Router M160
Page 12: ...M160 Internet Router Hardware Guide xii Table of Contents ...
Page 16: ...M160 Internet Router Hardware Guide xvi List of Figures ...
Page 18: ...M160 Internet Router Hardware Guide xviii List of Tables ...
Page 24: ...M160 Internet Router Hardware Guide xxiv Requesting Support ...
Page 26: ...2 Product Overview ...
Page 30: ...M160 Internet Router Hardware Guide 6 Safety Requirements Warnings and Guidelines ...
Page 66: ...M160 Internet Router Hardware Guide 42 Cable Management System ...
Page 80: ...M160 Internet Router Hardware Guide 56 Routing Engine Architecture ...
Page 82: ...58 Initial Installation ...
Page 104: ...M160 Internet Router Hardware Guide 80 Unpacking the Router ...
Page 148: ...M160 Internet Router Hardware Guide 124 Configuring the JUNOS Internet Software ...
Page 150: ...126 Hardware Maintenance Replacement and Troubleshooting Procedures ...
Page 242: ...M160 Internet Router Hardware Guide 218 Troubleshooting the Power System ...
Page 244: ...220 Appendixes ...
Page 292: ...M160 Internet Router Hardware Guide 268 Packing Components for Shipment ...
Page 301: ...Part 5 Index Index 277 ...
Page 302: ...278 Index ...