Connecting Liebert Ita2 Mbc Cables; Selecting Cables; Connecting Power Cables; Single-Input Configuration-Factory Default - Vertiv Liebert ITA2 User Manual

2.2

Connecting Liebert ITA2 MBC Cables

2.2.1

Selecting Cables

NOTE
Before connecting the cables between the Liebert ITA2 MBC and UPS, make sure that all the circuit breakers on
the Liebert ITA2 MBC front panel are open. Ensure that the feeder breakers are open and locked and tagged to
prevent inadvertent operation by unauthorized personnel.
I/O cables and signal cables are required for connection. When connecting the cables, you should follow the local
wiring regulations, take the environment situation into account.
The maximum current in different operating modes and the recommended power cables and plugs are listed in
Tables 2 through 4.
Table 2 Liebert ITA2 MBC currents and cables—User and UPS rectifier input
Unit Maximum Input
Rating Current, A * Number of Cables per Phase: 1
8KVA 24
10KVA 37
Table 3 Liebert ITA2 MBC currents and cables—User and UPS bypass input and output
Unit Maximum Input 75°C THW Copper
Rating Current (A)
8KVA 23
10KVA 28
Table 4 Recommended lug sizes
Cable Size, AWG T&B Lug P/N
4 RF4-14
6 RE6-14
8 RD8-14
10 RC10-14
NOTE
The wire size range for Liebert ITA2 MBC terminal blocks: Max. 4AWG, min. 14AWG.
Recommended torque value for phase terminal block: 35 lbf.in of 4-6 AWG; 25 lbf.in of 8 AWG; 20 lbf.in of
10-14AWG; Recommended torque value for neutral and ground busbar: 43 lbf.in.
2.2.2

Connecting Power Cables

NOTE
The terminal blocks use captive screws for connecting phase cables. The neutral cables and ground cable are
attached to the copper bars with captive screws.
2.3 Single-Input Configuration—Factory Default
Remove the conduit box from the Liebert ITA2 MBC and open the knockout hole, route cables through the
conduit, and then connect them to terminal block of the Liebert ITA2 MBC. The conduit size and wiring method
must be in accordance with all local, regional and national codes and regulations, including NEC ANSI/NFPA 70.
Vertiv | Liebert
® ™
ITA2 , 8-10kVA, 208/220V Three-Phase MBC User Manual | Rev. 0 | 02/18 |
75°C THW Copper
Wire (Phase)
8AWG
6AWG
75°C THW Copper
Wire (Phase) Wire (Neutral)
10AWG 10AWG
8AWG 8AWG
75°C THW Copper 75°C THW Copper
Wire (Neutral) Wire (Ground)
* Number of Cables: 1 * Number of Cables: 1
8AWG 10AWG
6AWG 10AWG
75°C THW Copper
Wire (Ground)
10AWG
10AWG
12