System Application Guide
SAG582127000
Spec. No. 582127000 (Model 721
NPBB
)
Issue AF, February 26, 2014
Page 87 of 125
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400V DC Input
DC Input Branch Circuit Protection and Wire Size Selection for DC Input Termination Assembly List
45, 46, 47 when used with 588705000 Module Mounting Shelves with Converters (input voltage range:
290V DC to 400V DC)
Refer to the following tables for recommended wire sizes and branch circuit protection.
DC INPUT TO LIST 45 DC INPUT TERMINATION ASSEMBLY
(400 Volts DC)
Provides “1 DC Feed per 1 Converter” Input Terminations
(System with Spec. No. 58870500040 Converter Shelves)
Input
Voltage
Input
Current
Overcurrent
Protection
40°C Ambient
Temperature
Wire
(1) (2) (3) (6)
Conduit
Size
400V DC
11A
(7)
15A
14 AWG
1/2”
(4)
3/4”
(5)
1
Wire sizes based on recommendations of the American National Standards Institute (ANSI) approved National
Fire Protection Association's (NFPA) National Electrical Code (NEC). Table 310.15 (B) (16) for copper wire at
90°C conductor temperature. For operation in countries where the NEC is not recognized, follow applicable
codes.
2
Equipment grounding conductors must be provided with the DC input conductors supplied to the shelf.
Equipment grounding conductor size based on recommendations of the NEC Table 250-122 for copper wire. If
aluminum or copper clad aluminum grounding conductor is used, refer to Table 250-122 for increased conductor
size. For operation in countries where the NEC is not recognized, follow applicable codes.
3
THHN 90
°
C Wire.
4
System with Four (4) Spec. No. 588705000 Converter Shelves: Conduit sized for six (6) current carrying
conductors and one (1) ground conductor per conduit (based on NEC recommendations), for three (3)
converters. For operation in countries where the NEC is not recognized, follow applicable codes.
5
System with Five (5) Spec. No. 588705000 Converter Shelves: Conduit sized for twelve (12) current carrying
conductors and one (1) ground conductor per conduit (based on NEC recommendations), for three (3)
converters. For operation in countries where the NEC is not recognized, follow applicable codes.
6
Maximum loop length is 100 meters (328 feet). Loop length is the sum of the lengths of the positive and
negative leads.
7
10.8Adc maximum input current @ 336V DC, 3500W output.
Table 24
Recommended DC Input Branch Circuit Protection and Wire Size when Using
List 45 “1 DC Feed per 1 Converter” DC Input Termination Assembly,
System with Spec. No. 588705000 Converter Shelves
