© 2016 Sensata Technologies
4
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 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 an appropriate gland/strain
relief
fi
tting.
b. Connect the AC wires from both cables inside the junction
box (L1-RED; L2 - BLACK; 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.
Figure 4, Attaching and Wiring the Junction Box
MicroGTs/
Branch
2
3
4
5
6
7*
8
9
External
Wire Size
Maximum External Cable Length in Feet (Meters)
12 AWG
(3.3 mm
2
)
370.7
(113)
237.1
(72)
167.9
(51)
124.3
(38)
93.6
(28)
70.2
(21)
51.4
(16)
35.7
(11)
10 AWG
(5.3 mm
2
)
593.1
(181)
379.4
(116)
268.6
(82)
198.9
(61)
149.7
(46)
112.3
(34)
82.3
(25)
57.1
(17)
8 AWG
(8.4 mm
2
)
926.8
(282)
592.9
(181)
419.6
(128)
310.7
(95)
233.9
(71)
175.5
(54)
128.6
(39)
89.3
(27)
6 AWG
(13.3 mm
2
)
1482.8
(452)
948.6
(289)
671.4
(205)
497.1
(152)
374.3
(114)
280.8
(86)
205.7
(63)
142.9
(44)
Table 1, AC Wire Sizes and Lengths
*
7 is the maximum number/branch with a 20-amp breaker
AC Connector cable
(PN: ME-MGT-AC-F)
AC Branch
Circuit cable
