©
2010 Magnum Energy, Inc
.
AC Input Wiring
Your inverter has an AC transfer feature that passes the AC input
power to the inverter’s output. Connection to the AC input is made
by hardwiring from a distribution panel as described below:
1. Run an appropriately sized 2-conductor plus ground cable (from the
AC distribution panel) through a strain relief on the AC IN opening.
Refer to Table 4 for minimum wire size and overcurrent protection
required for the AC input wiring.
2. Remove about two inches of the insulating jacket from the AC
cable, and then separate the three wires and strip about 3/4” of
insulation from each wire.
3. Using approved AC wire connectors, connect the incoming Hot
In, Neutral In, and Ground wires to the MM-AE Series’ AC wires
colored black (HOT IN), white (NEU IN), and green (AC GROUND)
respectively.
4. After making the AC input connections, secure the AC input cable
by tightening the strain relief.
The AC input wiring in the inverter is complete. Review all AC wiring
to ensure all connections are correct and secure.
19
Table 4, Minimum Wire Size to Circuit-breaker Size
2.0 Installation
Overcurrent protection must be provided by fuses or circuit-breakers,
and must
be properly sized and rated for the wire they are protecting
and the appliances being powered.
An external disconnect device is required for both the AC input and
AC output wiring. Most inverter’s that are “hardwired” use a service/
distribution panel wired to the inverter’s input (main panel), and a
dedicated panel between the inverter’s output wiring and the AC loads
(sub-panel). These systems use the circuit breakers provided in the
panels as the overcurrent protection and the AC disconnect. If fuses
are used, then separate AC disconnect switches will be needed.
Based on information from the NEC, Table 4 provides the minimum
AC wire size and the suggested breaker size based on the inverter
model. H
owever, larger wire size may be required because of volt-
age drop. The
AC wire sizes provided in this table assume using only
copper wire and a temperature rating of 75° C or higher. A minimum
of #14 AWG is required for all AC wiring.
Inverter
Model
AC Input
AC Output
Input
Breaker
Minimum
Wire Size
Suggested
Breaker
Size
Output
Breaker
Minimum
Wire Size
Suggested
Breaker
Size
MM612AE
7 amps
#14 AWG
10 amps
8 amps
#14 AWG
10 amps
MM1512AE
20 amps #12 AWG
20 amps
12 amps #14 AWG
15 amps
MM1524AE
20 amps #12 AWG
20 amps
12 amps #14 AWG
15 amps
