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Installation
Step 1: Installing the AC Junction Box
First, install and wire an AC branch circuit junction box (Figure 4).
1. Install an appropriate junction box at a suitable location on the
PV racking system (typically at the end of a branch of modules).
2. Connect the cables to the AC branch circuit junction box.
a) Route the open wire ends of the AC connector cable and
the AC branch circuit cable (from point of utility) in to the
junction box. Secure both cables using appropriate gland/
strain relief fi ttings.
b) Connect the AC wires from both cables inside the junction
box (L1 – Black; L2 – Red; NEUTRAL – White).
Note: Be sure to size the AC wire to account for any voltage drop
between the AC branch circuit junction box and the point of utility
interconnection. See Table 1.
AC Branch
Circuit Cable
Figure 4, Attaching and Wiring the Junction Box
Table 1, AC Wire Sizes and Lengths
MicroGTs/
2
Branch
External
Maximum External Cable Length in Feet (Meters)
Wire Size
12 AWG
370.7
(3.3 mm
)
2
(113)
10 AWG
593.1
(5.3 mm
)
2
(181)
8 AWG
926.8
(8.4 mm
)
2
(282)
6 AWG
1482.8
(13.3 mm
)
2
(452)
*
7 is the maximum number/branch with a 20-amp breaker
4
3
4
5
237.1
167.9
124.3
(72)
(51)
(38)
379.4
268.6
198.9
(116)
(82)
(61)
592.9
419.6
310.7
(181)
(128)
(95)
948.6
671.4
497.1
(289)
(205)
(152)
© 2016 Sensata Technologies
AC Connector Cable
(PN: ME-MGT-AC-F)
6
7*
8
93.6
70.2
51.4
(28)
(21)
(16)
149.7
112.3
82.3
(46)
(34)
(25)
233.9
175.5
128.6
(71)
(54)
(39)
374.3
280.8
205.7
(114)
(86)
(63)
9
35.7
(11)
57.1
(17)
89.3
(27)
142.9
(44)
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Troubleshooting
