Cisco Remote PHY Shelf 7200 Installing page 28

Connecting Power to the DC-Powered Cisco Remote PHY Shelf 7200
Connecting Power to the DC-Powered Cisco Remote PHY Shelf 7200
Warning The terminal block covers are an integral part of the safety design of the product. Do not operate the unit
without the covers installed. Statement 1077
Warning
Before connecting DC Power to theCisco Remote PHY Shelf 7200 DC Power Shelf, the ground connection
must always be made first and disconnected last.
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement
1030
The DC Power Shelf provides terminal blocks for facility input connectivity. It has 4 sets of input terminal
blocks to provide each power module with one facility connection.
The table below provides the common input range and circuit breaker requirements:
Table 1: Common DC Input Range and Circuit Breaker Requirements
DC Power
Minimum
DC
1
Before you begin
•
• The color coding of the DC-input power supply leads depends on the color coding of the DC power
• For DC input power cables, select the appropriate wire gauge based on the National Electrical Code
Installing the Cisco Remote PHY Shelf 7200
28
System Input
Rating (in A)
Maximum
one feed of 60
A per DC
Power Module
If AWG #2 wire is used for DC power module connections, the chassis ground wire must also be
upgraded to an AWG #2 wire and connector .
Attaching a Chassis Ground Connection, on page
source at your site. Typically, green or green/yellow is used for ground (GND), black is used for -48V
on negative (-) terminal and red is used for RTN on the positive (+) terminal. Ensure that the lead color
coding you choose for the DC-input power supply matches lead color coding used at the DC power
source.
(NEC) and local codes for 60-amp service at nominal DC input voltage (-48 VDC). Two pairs of cable
Circuit Breaker (in A)
Minimum Maximum
Always 60
14.
Installing the Cisco Remote PHY Shelf 7200
AWG # Wire
AWG # 4 or AWG # 2
AWG # 6
1