User manual
Table Of Contents
- Important Safety Instructions
- 1.0 Installation Instructions
- 1.1 Unpacking and Installation
- 1.2 Additional Distribution Mounting and Wiring
- 1.3 Power and Control Wiring
- 1.3.1 Input Power Connections
- Figure 5 Electrical connection location for 23" (584mm) cabinet
- Figure 6 Electrical connection location for 47" (1194mm) cabinet
- Figure 7 Electrical connection location for 47" cabinet with Square D I-Line panelboard
- Table 4 Suggested minimum input wire size data
- Table 5 Main input circuit breaker interrupting rating
- 1.3.2 Junction Box Installation
- Table 6 Main input junction box electrical connections (4 wire)
- Table 7 Main input junction box without transformer electrical connections (5 wire)
- Table 8 Low-voltage (control) junction box dimensions, typical
- Table 9 Main input (power) junction box dimensions, typical
- Figure 8 Low-voltage control junction box connections, typical
- Figure 9 Main input junction box connections, typical
- 1.3.3 System Grounding
- 1.3.4 Grounding Electrode Conductor for Liebert® FPCs With Transformer
- 1.3.5 Output Power Connections
- 1.3.6 Control Wiring Connections
- 1.3.7 Adapter Board
- 1.3.1 Input Power Connections
- 2.0 Equipment Inspection and Startup
- 3.0 Inspection and Startup Checklist
- 4.0 Operating Instructions
- 5.0 Maintenance
Installation Instructions
9
1.3 Power and Control Wiring
Power and control wiring should be installed by licensed electricians. All power and control wiring
must comply with the NEC and applicable local codes.
1.3.1 Input Power Connections
If the Liebert
®
FPC
™
is furnished with a main input junction box, input power connections are made
as detailed in 1.3.2 - Junction Box Installation.
If a junction box is not furnished, the input power feeder is connected to the main input circuit
breaker located inside the Liebert FPC. (See Figures 5 through 7.)
To minimize disturbances from other loads in the building, the 3-phase power input to the Liebert
FPC should be supplied directly from the service entrance or other power source (a dedicated power
feeder).
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.
Typical conductor size data is shown in Table 4. All connections must comply with the NEC and all
other applicable codes.
For units with a transformer, the main input feeder should consist of 3-phase conductors and one
(safety) ground conductor (3W + G).
For units without a transformer, the main input feeder must consist of 3-phase conductors, one
neutral and one (safety) ground conductor (4W + G).
!
WARNING
Risk of electric shock and arc flash. Can cause injury and death.
Verify that all incoming line voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in the
junction box or in the Liebert FPC.