Connecting A Large Dc Ground Wire; Inverter Notifi Cation Requirements; Final Inspection; Figure 2-16, Connecting A Large Dc Ground Wire - Magnum Energy ME3112-U Owner's Manual

2.6.4

Connecting a Large DC Ground Wire

Marine installations require the DC ground wire to be the same size or one size smaller than the
negative cable. Use the following steps to allow a larger ground wire to be connected.
WARNING: Fire and Shock Hazard – disconnect all AC and DC sources before working
in the AC wiring compartment.
1. Remove the inverter's AC access cover plate
(see Figure 1-3, Item 15).
2. Locate the DC Equipment Ground Terminal
(see Figure 1-2, Item 7).
3. Within the AC wiring area, locate the hex nut
on the backside of the DC ground terminal.
Use a 7/16" wrench/nut driver to remove the
hex nut, bolt, lock washer and DC ground
terminal.
4. Reverse the removed bolt, and place it back
in the chassis hole. Attach a correctly sized
ground cable with a ring terminal to the ME's
chassis—as shown in Figure 2-16.
Note: Ring terminal must have a hole size
≥1/4".
5. Place the washer and nut on the bolt—over
the ground cable—and then securely tighten
the nut [from 4 to 5 lbf-ft (5.4 to 6.8 N-m)].
Replace the AC access cover plate.
2.7 Inverter Notifi cation Requirements
A warning label as shown in Figure 2-17 is provided to inform all personnel that an inverter is
installed in your electrical system. Affi x this label in a clearly visible location at the electrical panel
that is being powered by the inverter. This is because it might be falsely assumed that the panel
is no longer "hot" after the AC power has been shut off, when power may actually still be available
due to the inverter automatically powering the panel.
2.8

Final Inspection

Note: If required by code, have the installation inspected by an electrical inspector.
1. Verify all cable runs are secured with wire ties or other non-conductive fasteners to prevent
chafi 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 all AC connections are correct and torqued to a maximum of 16 lbf-in (1.8 N-m).
4. Replace the covers on the main electrical/distribution panel.
5. Replace the chassis access cover.
6. Verify the inverter's front panel switch is in the OFF position.
© 2017 Sensata Technologies
WARNING
ELECTRICAL SHOCK HAZARD
This electrical system is equipped with an Automatic Generator
Starting (AGS) device and/or an inverter. Disconnect all AC and
DC power to the AGS and/or inverter before performing any
service to the electrical system. Failure to do so can result in
shock causing serious injury or death.

Figure 2-17, Warning Label

Figure 2-16, Connecting a Large DC
Ground Wire
PN: 62-0002 Rev B
Installation
DC ground
terminal bolt/nut,
reversed and
tightened
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