Vertiv | Liebert
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RX
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Remote Distribution Cabinet User Manual | 9
1.6 Power Wiring
Power wiring should be installed by licensed electricians. All power wiring must comply with the
NEC and applicable local codes.
1.6.1 Input Power Connections
Remove the front door. Open the accent panel, punch the top and/or bottom conduit tray to
match the number and size of the input conduit(s) and attach the input feeder.
Input power cables should be connected to the input lugs located inside the unit. (See Figures 4
through 7 and the electrical field connection drawing supplied with the unit for details.)
To minimize disturbances caused by other loads in the building, the 3-phase power input to the
unit should be supplied directly from a dedicated power source.
The input feeder circuit should be sized in accordance with the NEC and any local building codes
to ensure the feeder’s ability to safely carry the system’s full load current, including losses.
Input feeder conductors should be sized for no more than 2% voltage drop. If operation at
undervoltage conditions for extended periods of time is desired, the input feeders must be
oversized.
The main input feeder must consist of 3-phase conductors, one neutral and one (safety) ground
conductor (4W + G).
WARNING
Risk of electric shock. Can cause personal injury or death.
Verify that all incoming line voltage (power) circuits are de-energized and locked out
before installing cables or making connections in the unit.
Before proceeding with installation, read all instructions, verify that all the parts are
included and check the nameplate to be sure the voltage matches available utility power.
Follow all local codes.
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