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2020 Sensata Technologies
Page 21
Installation
2.5.5
AC Conductor Wiring
The following steps are basic guidelines for installing and connecting AC wiring to and from an
MSH3012RV inverter.
WARNING
: Before making any AC connections, make sure the inverter is disconnected
from the battery and no AC power is connected to the inverter.
Remove the two Phillips screws on the AC wiring access cover (Figure 1-3, Item 16) to access the
internal AC terminal block (see Figure 2-8).
Wiring the Inverter AC Input
1. Route the wires (HOT, NEUTRAL, and GROUND) from the AC electrical main panel through
one of the strain relief clamps on the inverter (Figure 1-2, Item 9). Tighten the strain relief
clamp securely on the wires. Always leave a little extra slack in the wiring. Refer to Figure 2-9
for this procedure.
2. Connect a HOT wire (black) from the main panel’s dedicated breaker to the inverter’s HOT 1
IN terminal. Tighten the HOT 1 IN terminal to 16 in-lbf (1.8 N-m).
Info
: You must connect to the HOT 1 IN terminal if you want to use the battery charger.
If also connecting to the HOT IN 2 terminal, the incoming AC must provide a neutral and
come from either a split-phase (120/240VAC) or three-phase (120/208VAC) source.
3. Optional:
If wiring as Dual In (DI), connect another HOT wire (red) from the main panel’s
dedicated breaker to the inverter’s HOT 2 IN terminal. Tighten the HOT 2 IN terminal to
16 in-lbf (1.8 N-m).
4. Connect the NEUTRAL (white) from the main panel’s neutral busbar to the inverter’s NEUT IN
terminal. Tighten the NEUT IN terminal to 16 in-lbf (1.8 N-m).
Wiring the Inverter AC Output
5. Route the wires (HOT, NEUTRAL, and GROUND) through the unused strain relief clamp on the
inverter (Figure 1-2, Item 9) to the AC electrical sub-panel. Tighten the strain relief clamp
securely on the wires.
6. Connect a HOT (black) wire from the inverter’s HOT 1 OUT terminal to the sub-panel‘s main
breaker. Tighten the AC HOT 1 OUT terminal to 16 in-lbf (1.8 N-m).
7. Optional:
If wiring as Dual Out (DO), connect another HOT (red) wire from the inverter’s
HOT 2 OUT terminal to the sub-panel‘s main breaker. Tighten the AC HOT 2 OUT terminal to
16 in-lbf (1.8 N-m).
8. Connect the NEUTRAL (white) from the inverter’s NEUT OUT terminal to the sub-panel’s neutral
busbar. Tighten the NEUT OUT terminal to 16 in-lbf (1.8 N-m).
Wiring the Inverter AC Ground
9. Combine the ground (GREEN) wire from the main panel’s ground busbar and the ground
(GREEN) wire from the sub-panel’s ground busbar (or the ground connection on the outlets if
using the output breaker versions). After these grounds are combined, connect them to the
inverter’s AC GROUND terminal. Tighten the AC GROUND terminal to 16 in-lbf (1.8 N-m).
AC Wiring Inspection
1. Verify all cable runs are secured. Use wire ties or other non-conductive fasteners to prevent
cha
fi
ng or damage from movement and vibration.
2. Verify strain reliefs or grommets are in place to prevent damage to the wiring where it passes
through walls/bulkheads or other openings.
3. Verify that all AC connections are correct, all the inverter AC terminal screws are torqued to a
maximum tightening torque of 16 in lbf (3.6 N-m), and the AC ground terminal is torqued to
a maximum tightening torque of 45 in lbf (5.1 N-m).
4. Replace the AC wiring access cover and the covers on the main electrical/distribution panel.
