3
2.0 INSTALLATION
©2000 Xantrex/Trace Engineering
Pre-Installation
(continued)
DC Connections:
ST1500 and ST2500
DC connections are made on the combiner board for models ST1500 and ST2500. The
combiner board accepts wire sizes from #614 AWG. Refer to the table below for minimum
recommended wire sizes.
DC Amps
NEC Amp
(Amps x 156% )
Minimum Wire Size for Specified Distance
0–25 Ft
One Way
25–50 Ft
One Way
50–100 Ft
One Way
1.0
1.6
14 AWG
14 AWG
14 AWG
3.0
4.7
14 AWG
12 AWG
10 AWG
5.0
7.8
12 AWG
10 AWG
6 AWG
7.0
10.9
12 AWG
8 AWG
6 AWG
9.0
14.0
10 AWG
8 AWG
Not Recommended
11.0
17.2
10 AWG
6 AWG
Not Recommended
975-000-002
Table 2
Recommended Minimum DC Wire Sizes
NOTE: These are the minimum recommended wire sizes. Installing a large number of wires in
conduit or enclosed locations may require larger wire sizes. Consult your local/national electrical
code for more information.
NOTE: The National Electrical Code (NEC) places restrictions on minimum DC wire bending radius.
A #6 AWG wire is the largest that may be used on the ST1500 and ST2500 inverters.
Figure 1
Combiner Board Indicating DC PV Array Wire Connection Points
PV array wiring
(note polarity)
DC conduit wiring
(from solar arrays)
