Procedure For Cable Connections; Table 11 Recommended Cable Size And Torque Requirements - Mitsubishi Electric 1100B Series Owner Technical Manual

3.5 PROCEDURE FOR CABLE CONNECTIONS

1. Confirm the capacity of the UPS being installed. Identify the input/output power terminal
blocks shown in Figure 37 or Figure 38.
2. Connect the grounding conductor from the input service entrance to the UPS ground bar.
3. Confirm that an external input circuit breaker sized to protect both the converter input and the
bypass lines is installed. Consult the equipment nameplate for current ratings. Connect the
AC power source cables from the input service entrance to the UPS INPUT power terminals
(identified as A10, B10, C10 and N10 in Figure 39). The input cables must be sized for an
ampere rating larger than the maximum current capacity of the UPS.
4. Refer to Table 12 for recommended cable sizes. Referring to Figure 39, connect UPS
OUTPUT load terminals A40, B40, C40 and N10 to the load distribution panel.
5. Connect external signal terminal block as needed. Refer to Section 2.3, ▲Figure and
▲Figure for functional descriptions. AWG12, or less, shielded conductor is recommended.
! NOTE: UPS power terminals are supplied with stud type fittings. It is
recommended that compression lugs be used to fasten all
input/output power cables. Refer to Table 13 for recommended
compression lugs and appropriate crimping tools.
NOTE

Table 11 Recommended Cable Size and Torque Requirements

UPS AC Input Side
Capacity Cable *
(kVA) Size
10kVA 8 AWG
20kVA 4 AWG
30kVA 2 AWG
40kVA 1/0 AWG
50kVA 3/0 AWG
60kVA 4/0 AWG
70kVA 2x 1 AWG
80kVA 2x 1/0 AWG
*1 - Voltage drop across power cables shall not exceed 3% of nominal source voltage.
*2 - Allowable ampere ratings based on 90°C insulation at an ambient temperature of 40°C.
No more than 3 conductors in a raceway can be used without de-rating. Copper conductors are
assumed.
!
NOTE: If intending to upgrade the input/output/battery wiring and branch
circuit protection in future, specific renovations will be required.
NOTE
1100B SERIES UPS
OWNERS / TECHNICAL MANUAL
*1
2
Torque Cable *
(in. lbs) Size
185～270 8 AWG
185～270 4 AWG
185～270 1 AWG
185～270 2/0 AWG
185～270 4/0 AWG
185～270 2x 1 AWG
185～270 2x 1/0 AWG
185～270 2x 2/0 AWG
MITSUBISHI ELECTRIC 1100B SERIES UPS
DC Input Side
2
Torque
(in. lbs)
185～270
185～270
185～270
185～270
185～270
185～270
185～270
185～270 2x 1/0 AWG
Page Number:
3-7
*1
Bypass input Side
*1
Output Side
2
Cable * Torque
Size (in. lbs)
8 AWG 185～270
4 AWG 185～270
2 AWG 185～270
1/0 AWG 185～270
2/0 AWG 185～270
4/0 AWG 185～270
2x 1 AWG 185～270
185～270