Emerson FPC user manual Additional Distribution Mounting & Wiring, Power and Control Wiring

Installation Instructions

1.2Additional Distribution Mounting & Wiring

For Liebert FPCs with more than four panelboards, the additional panelboards are furnished in Lie- bert FDC enclosures, which are shipped separately from the Liebert FPC.

1.2.1Liebert FDC Distribution Mounting

The Liebert FDC distribution cabinet has the same base dimensions as a 23" (584mm) cabinet FPC

(23-1/2" wide x 38" deep [597 x 965mm]) and may be mounted on either the left or right side of the FPC.

1.Provide a floor cutout for exit of output cables, as shown in Figure 1.

2.Remove the side panel, internal panel and the lower panel bracket from the FPC.

3.Remove the FDC side panel and internal panel, if supplied, and align the FDC with the FPC and bolt the units’ frames together (hardware provided by others).

If floor pedestals are used for the FPC, two additional floor pedestals are required for the outside corners of the FDC. See Figure 1.

4.Install the lower panel bracket on the opposite side of the FDC cabinet.

5.Make electrical connections. For details, see “Electrical Field Connections” drawings supplied with the unit.

6.Install the FPC side panel on the FDC cabinet.

1.2.2Distribution Cabinet Electrical Connections

Five field-supplied conductors (3-phase conductors, neutral and ground) are needed to connect the FDC cabinet to the FPC cabinet in the field.

For Liebert FPCs with transformers, the distribution cabinet phase conductors are connected directly to the transformer terminals:

Phase A to X1 Phase B to X2 Phase C to X3

The FDC’s neutral and ground conductors are connected to the FPC’s neutral busbar and main ground busbar (see unit wiring diagram for location).

For Liebert FPCs without transformers, the distribution cabinet phase and neutral conductors are connected to the corresponding output power distribution terminal blocks inside the FPC. The distri- bution cabinet ground conductor is connected to the main ground busbar.

For all Liebert FPCs with current monitoring, route each distribution cabinet conductor through the appropriate current transformer (CT) in the FPC.

NOTE

Distribution cabinet conductors must pass through the current transformers in the same direction as the FPC panelboard conductors. Use the existing FPC panelboard wiring for reference.

1.3Power 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.

1.3.1Input Power Connections

If the 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 FPC. (See Figures 5 through 8.)

! WARNING

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 FPC.

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