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Chapter 3 Using DC Power 3-3
3.2 Assembling the DC Power Connectors
The Netra 120 server has a dedicated connector kit; this section explains how to use
it.
3.2.1 The Insulated Conductors You Need to Use
The insulated conductors you use must have the following characteristics:
■ Material: tinned copper (multistranded)
■ Size: 12 AWG (2.5 mm
2
) (maximum)
■ Rating:
■ 300 vrms (minimum)
■ 75
O
C
■ Low-smoke fume (LSF)
■ Fire resistance:
■ VW-1
■ GR63-CORE compliant
You need two supply conductors:
■ One -48V (or -60V) DC supply conductor (return, RTN) grounded at source
■ One DC supply conductor (- minus)
Finally, you need one power supply unit (PSU) ground conductor.
3.2.2 Assembling the DC Input Power Cable
1. Determine how many DC input power cables you will need from each DC power
source.
2. Turn off power to the DC power source through the circuit breakers.
Caution – Do not proceed with these instructions until you have turned off the
power to the DC power source through the circuit breakers.
3. Take a DC connector from the ship kit.
4. Locate the Supply and Return wires (and the PSU Ground, if you are using it)
coming from the DC power source that you intend to use in the connection to your
server: