7
2.3
Making the AC Input Connections
Before making any connections to the A75D(E) ensure that the AC Power is off at the main breaker box and
that both of the unit’s breakers are off. Check that the source voltage and frequency matches the voltage and
frequency listed on the charger nameplate. For units with transformer taps, verify that the tap has been set to
the correct AC input. (See Section 2.2 for instructions on changing the transformer tap). Select wire size, using
the table below, based on an overload current of 110-115% of the input current listed on the charger
nameplate.
BREAKER WIRE
SIZE
EQUIPMENT
SIZE REQUIREMENT
GROUNDING
(AMPS) FOR
CUSTOMER
CONDUCTOR
CONNECTION MINIMUM
1
#14
#14
3
#14
#14
4
#14
#14
5
#14
#14
6
#14
#14
10
#14
#14
15
#12
#12
20
#12
#12
25
#10
#12
30
#10
#10
35
# 8
#10
40
# 8
#10
45
# 8
#10
50
# 8
#10
60
# 6
#10
70
# 6
# 8
80
# 4
# 8
90
# 4
# 8
100
# 4
# 8
110
# 2
# 6
125
# 2
# 6
130
# 2
# 6
140
# 1
# 6
Table 6 - Wire Size Minimum Requirements
NOTE: These are recommended sizes. All National and Local Wiring Codes must be followed
AC Connection Procedure
First connect an adequate earth ground lead (use table above for sizing) to the terminal marked ground. Run
the input AC wiring to terminals marked
L1
and
L2
on the din rail in the enclosure (for units with transformer
taps use the table on page 8 for input connections). To make these connections, strip the insulation about 0.5
inches (13 mm) on the incoming wires and connect the wires to the appropriate terminals. Using a flat-head
screwdriver, securely tighten the compression screws on the terminals.
