Procedure For Cable Connections; Table 3.6 Recommended Cable Size And Torque Requirements - Mitsubishi Electric 1100A 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 3.7 or Figure 3.8.
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 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 3.9. Input cables must be sized for an ampere
rating larger than the maximum current capacity of the UPS.
4. Refer to Table 3.6 for recommended cable sizes. Referring to Figure 3.9, connect UPS
OUTPUT load terminals A40, B40, C40 and N10 to load distribution panel.
5. Connect external signal terminal block as needed. Refer to Section 2.3, Figure 2.21 and
Figure 2.22 for functional description. 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 3.7 for recommended
compression lugs and appropriate crimping tool
NOTE

Table 3.6 Recommended Cable Size and Torque Requirements

UPS Input Side * 1
Capacity Cable *
(kVA) Size
10kVA 8 AWG or
larger
20kVA 4 AWG or
larger
30kVA 2 AWG or
larger
40kVA 1/0 AWG or
larger
50kVA 3/0 AWG or
larger
*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 without de-rating. Copper conductors assumed.
!
NOTE: Intended to upgrade in future input/output/battery wiring and branch
circuit protection will require upgrade.
NOTE
1100A SERIES UPS
OWNERS / TECHNICAL MANUAL
2
Torque Cable *
(in. lbs) Size
135 in. lbs 8 AWG or
larger
135 in. lbs 4 AWG or
larger
135 in. lbs 1 AWG or
larger
135 in. lbs 2/0 AWG or
larger
135 in. lbs 4/0 AWG or
larger
MITSUBISHI ELECTRIC 1100 SERIES UPS
DC Input Side
2
Torque
(in. lbs)
135 in. lbs 8 AWG or
135 in. lbs 4 AWG or
135 in. lbs 2 AWG or
135 in. lbs 1/0 AWG or
135 in. lbs 2/0 AWG or
Page Number:
3-8
Output Side * 1
2
Cable * Torque
Size (in. lbs)
135 in. lbs
larger
135 in. lbs
larger
135 in. lbs
larger
135 in. lbs
larger
135 in. lbs
larger