4
Figure 3 - MSM Mounting Dimensions for Large Case #205
2.2
Electrical Connections
Before beginning any work, ensure that all incoming AC supply and DC load wires are de-energized. Verify that
no voltage is present by using a voltmeter at all input and output terminals. The MSM is equipped with screw-
type terminals for the output connections. See Figure 3 and 4.
2.2.1 Input Connections
Check that the source voltage and frequency match the charger nameplate specifications. Select wire size using
Table 2. Before connecting the Battery and/or DC loads, it is recommended to apply AC power and set the
configuration for the correct output, see section 3.3 for the configuration instructions. Once the configuration is
set, remove AC power to the charger.
UNIT
OUTPUT
RATING
AC WIRE SIZE
MINIMUM FOR
CUSTOMER
CONNECTION
DC WIRE SIZE
MINIMUM FOR
CUSTOMER
CONNECTION
EQUIPMENT
GROUNDING
CONDUCTOR
MINIMUM
10A-12V
#14
#14
#14
20A-12V
#14
#10
#14
30A-12V
#14
#8
#14
40A-12V
#14
#8
#14
60A-12V
#12
#8
#12
80A-12V
#12
#6
#12
10A-24V
#14
#14
#14
20A-24V
#14
#10
#14
25A-24V
#14
#10
#14
30A-24V
#14
#8
#14
35A-24V
#12
#8
#12
50A-24V
#12
#8
#12
65A-24V
#12
#6
#12
Table 2 - Wire Size Minimum Requirements
Note: All wires specified in the table are rated at 90 °C or 194 °F.
These are recommended sizes. All National and Local Codes must be followed.
