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
14
1.3.2 Junction Box Installation
Main input (power) and low-voltage (control) junction boxes are available for the Liebert
®
FPC
™
to
simplify customer connections.
The junction boxes, if used, can either be shipped with the system or can be advance-shipped for
installation during the roughing-in stage of new construction.
Liebert supplies flexible, 10-foot-long (3m) conduit with cables for connecting the junction boxes to the
unit. The junction boxes should be installed a maximum of 8 ft. (2.4m) from the feeder entrance of the
unit.
Liebert recommends centering the junction boxes under a floor tile that is easily removed.
Junction box connections must be installed in compliance with the NEC and all other applicable
codes.
Typical junction box connections are shown in Figure 14 and described in 1.3 - Power and Control
Wiring.
Dimensions are given on the drawings furnished with the unit. Typical dimensions of the junction
boxes are as follows:
!
WARNING
Risk of electric shock and arc flash. Can cause injury and death.
Verify that incoming line voltage (power) and low-voltage (control) circuits are de-energized
and locked out before installing cables or making any connections in the junction box.
Table 6 Main input junction box electrical connections (4 wire)
Junction Box Size
Inches (mm) Electrical Connections
27 x 14 x 6
(686 x 356 x 152)
400A 3 pole power block with 1/2 -13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 - 16 studs on 1.75” centers
35 x 22 x 6
(889 x 559 x 152)
750A phase busbars with 1/2 -13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 - 16 studs on 1-3/4" (44mm) centers
Table 7 Main input junction box without transformer electrical connections (5 wire)
Junction Box Size
Inches (mm) Electrical Connections
27 x 14 x 6
(686 x 356 x 152)
400A 3 pole power block with 1/2 -13 studs on 1-3/4" (44mm) centers
750A neutral busbar with two sets of 1/2 - 13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 - 16 studs on 1-3/4" (44mm) centers
35 x 22 x 6
(889 x 559 x 152)
750A phase busbars with 1/2 -13 studs on 1.75” centers
1500A neutral busbar with two sets of 1/2 - 13 studs on 1-3/4" (44mm) centers
750A ground busbar with two sets of 3/8 - 16 studs on 1-3/4" (44mm) centers
Table 8 Low-voltage (control) junction box dimensions, typical
Width, inches (mm)
8 (203)
Length, inches (mm)
10 (254)
Height, inches (mm)
4 (102)