Appendix
990-4049
Installation Guide APC Silcon 240-320kW 480V UPS 77
specific Input Cable ampacities may vary from above chart.
7.Breaker/Fuse selection based on Nom input current is acceptable provided battery recharge time is
short.
Consult factory for application specific assistance.
8.Grounding conductor ampacities: Refer to NEC Article 250-122 and NEC Table 250-122.
Neutral conductors ampacities: Refer to NEC Article 310-15.
9.All wiring to be in accordance with all applicable national and/or local electrical codes.
10. Nominal Battery Discharge current based on full rated load, and nominal Battery voltage.
11.Maximum Battery Discharge current based on full rated load at end of Discharge.
12. Heat rejection calculated at nominal full load capacity.
A.Not more than 3 current carrying conductors in raceway assumed; ambient temperature of 30°C
(86°F) assumed. Cable ampacity next size above Overcurrent Protection provided by others.
B. Temperature rating of conductors: 90°C (194°F). Reference Table 310-16 of NEC, 75°C column,
using copper conductors. 75°C (167°F) cable terminal connectors assumed.
C.Reference: NEC handbook 1999. Consult local codes for possible variations.
D.All cable and breaker/fuse ratings are supplied as guidelines only. These guidelines are minimum
recommendations only not substitutes for review and compliance with NEC and local codes.
Consult with your licensed engineer for site specific applications.
8.2 Table 2 – Table 310-16

Allowable Ampacities of Insulated Conductors rated 0-2000 Volts, 60° to 90°C (140° to

194°F)1
Not More than Three Conductors in Raceway or Cable or Earth (Directly Buried), based on Ambient
Temperature of 30° (86°F)
Size Temperature Rating of Conductor (See Table 310-13) Size
AWG
or
kcmil
60°C
(140°F)
75°C
(167°F)
90°C
(194°F)
60°C
(140°F)
75°C
(167°F)
90°C
(194°F)
AWG
or
kcmil
Types
TW
UF
Types
FEPW,
RH,RHW,
THHW,
THW,
THWN,
XHHW,
USE, ZW
Types
TBS,SA,
SIS,FEP,
FEPB,MI,
RHH,RHW-2
THHN,
THHW,
THW-2,
THWN-2,
USE-2,
XHH,XHHW,
XHHW-2,
ZW-2
Types
TW
UF
Types
RH,
RHW,
THHW,
THW,
THWN,
XHHW,
USE
Types
TBS,SA
SIS,
THHN,
THHW,
THW-2,
THWN-2,
RHH,
RHW-2,
USE-2,
XHH,
XHHW,
XHHW-2,
ZW-2
Copper
[A]
Aluminum or Copper-Clad
Aluminum [A]
18
16
14*
12*
10*
8*
–
–
20
25
30
40
–
–
20
25
35
50
14
18
25
30
40
55
–
–
–
20
25
30
–
–
–
20
30
40
–
–
–
25
35
45
–
–
–
12*
10*
8
6
4
3
2
1
55
70
85
95
110
65
85
100
115
130
75
95
110
130
150
40
55
65
75
85
50
65
75
90
100
60
75
85
100
115
6
4
3
2
1