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©
2013 Magnum Energy, Inc
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Installation
2.6.6
Disabling the Neutral-to-Ground Connection
All MS-PE Series inverter/chargers have the automatic neutral-to-ground switching feature. In
some installations/jurisdictions, this feature must be disabled. If you are not sure whether you must
disable this feature, check your local code requirements. The following steps will guide you in disabling
the neutral-to-ground switching feature in the MS-PE Series inverter/charger.
Info:
The ground connection from the inverter’s AC and DC ground terminals should
still be connected to the system ground even if ground switching has been disabled.
WARNING:
Fire and Shock Hazard – disconnect all AC and DC sources before working
in the AC wiring compartment.
1. Locate and remove the AC Access Cover plate
(see Figure 1-3, Item 15) on the side of the
MS-PE Series inverter.
2. Look inside and locate the green wire with
the insulated connector at the top of the AC
wiring compartment; see Figure 2-16. This
insulated connector connects the neutral and
ground inside the inverter.
3. Pull the two ends of the insulated connector
apart to separate the green wire. This will
prevent the neutral and ground from con-
necting inside this inverter.
4. Move the two disconnected ends away from
each other and push back out of the way. You
must ensure that the two connector ends will
not have any contact with any other wires
within the AC compartment. You may want
to use electrical tape to insulate the ends
and secure them out of the way.
Figure 2-16, Disconnecting the
Neutral-to-Ground Connection
2.6.7
Connecting a Large Ground Wire
If your installation requires a larger ground wire than what has been provided, follow the steps
below to connect the larger wire.
1. Locate the DC Equipment Ground Terminal
(see Figure 1-2, Item 7).
2. Locate and remove the AC Access Cover plate
(see Figure 1-3, Item 15) on the side of the
MS-PE inverter.
3. Within the AC wiring area, locate the hex nut
on the back side of the DC ground termi-
nal. After locating the hex nut, use a 7/16”
wrench/nut driver to remove the hex nut,
bolt, lock washer, and DC ground terminal,
and then remove them from the chassis.
4. Reverse the removed bolt, and place it back
in the chassis hole to attach a correctly sized
ground cable to the MS-PE Series chassis, as
shown in Figure 2-17.
5. Place the washer and nut on the bolt, over
the ground cable, and securely tighten the
nut [from 4 to 5 ft lbf (5.4 to 6.8 N-m)].
Replace AC Access Cover plate and secure.
Figure 2-17, Large Ground Wire
Connected to MS-PE Series
DC Ground
Terminal bolt/nut,
reversed and
tightened
Neutral-to-
Ground
Connection
(green wire)
