Installation

 

All wiring and installation methods should conform to applicable

 

electrical and building codes.

Conduit holes

Pre-plan the wire and conduit runs. Knockouts for conduit holes are

 

located on the bottom of the unit. See Figure 2-9.

Acceptable wire

The DC terminal blocks in the Sun Tie XR accept up to a #6 AWG wire.

sizes

The AC circuit disconnects accept cable sizes up to #6 AWG.

 

For maximum safety, run AC and DC wires/cables in separate conduits.

WARNING: SHOCK HAZARD

Check for existing electrical or plumbing prior to drilling holes in the walls.

Planning AC Connections

AC connections include all the wires and connectors between the Sun Tie XR AC output breakers and the main utility electrical panel. Figure 2-14and Figure 2-15show simplified diagrams of the entire installation.

Recommended wire sizes

The AC output breakers accept wire sizes from #6–14 AWG. Refer to Table 2-1for minimum recommended wire size. The values in Table 2-1are the minimum recommended wire sizes in conduit. 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.

Table 2-1 Recommended minimum AC wire sizes

 

 

 

Minimum wire size for specified distance

 

 

 

 

 

 

 

AC amps

NEC amps per leg

0–50 ft

50–100 ft

100–200 ft

Inverter model

output per leg

(amps x 125%)

one way

one way

one way

 

 

 

 

 

 

STXR1500

6.3

7.9

14 AWG

10 AWG

8 AWG

 

 

 

 

 

 

STXR2500

10.4

13.0

12 AWG

8 AWG

6 AWG

 

 

 

 

 

 

Note: The six-circuit combiner board is rated for 100 amps (Imp) of maximum real current. Although the 20 amp fuses will theoretically allow 120 amps to be applied, always design for a maximum of 100 amps maximum current. With appropriate fuse deratings, per NEC code, the maximum allowed current is 16 amps for any of the six circuits.

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