SENS EnerGenius® DC Wallbox Technical Manual
16
6.2.
Grounding Instructions and Connection
6.2.1.
Charger must be grounded to reduce risk of electric shock. The charger must be connected to a
grounded, metal, permanent wiring system, or an equipment-grounding conductor (earthing
conductor) must be run with the circuit conductors and connected to equipment-grounding
terminal on charger.
6.2.2.
Connect the equipment grounding conductor to the ground lug in the charger (see Figure 1). This
lug is marked with the ground symbol. This should always be the first wire connected and the last
wire disconnected. Tighten connections to torque specified in Table 3.
Table 3
–
Ground Allowed Wire Gauge and Torque Requirements
Ground
Connection Type
Allowed Wire Gauge
Required Torque
Tool
Terminal Block
14-4 AWG (2.5-25 mm
2
)
50.0 In-Lb (5.65 Nm)
Flat Screwdriver
6.3.
DC Connection
Ensure that any battery disconnect devices in the system, if used, are opened (battery disconnected from
DC bus). Connect the DC output conductors to the DC output terminal block/breaker in the charger (see
Figures 1-3). Always observe proper polarity of the DC output leads. Always connect the output leads in
the following order
–
charger output to ungrounded battery terminal, followed by charger output to
grounded battery terminal. If the battery must be disconnected for service, remove the output wiring in
the reverse order. Tighten connections to torque specified in Table 4. Route DC wiring at least ¼ inch
(6 mm) away from AC wiring, alarm wiring, and the circuit board.
Table 4
–
DC Allowed Wire Gauge and Torque Requirements
DC Connection
Type
DC Connection Type
Allowed Wire Gauge
Required Torque
Tool
120VDC
Single Box Lug on
Breaker Terminal
1 AWG
–
300 kcmil
(50-150 mm
2
)
135 in-lb (15.25 Nm)
M8 hex
240VDC
Single Box Lug on
Breaker Terminal
14
–
2 AWG
2.5-35mm
2
14-10AWG: 20 in-lb (2.26 Nm)
8AWG: 35 in-lb (3.95 Nm)
6-2AWG: 75 in-lb (8.47 Nm)
M6 hex
Table 5
–
DC Output Breaker Rating
Charger Nominal
Output Voltage
(VDC)
DC Breaker
Rating (Amps)
DC Breaker Interrupt
Standard Rating
(KAIC)
DC Breaker Interrupt
Optional Rating
(KAIC)
120
150
10
25
240
70
10
-
6.4.
AC Connection
This unit is to be permanently connected to the AC circuit and to the battery. The charger is rated to
operate at full power on any AC input within the range of 358-528VAC, 47-63Hz. The unit is rated to
operate at 50% power from 188-357VAC, 47-63Hz.
Ensure that the AC input supply is de-energized. Connect the AC line conductors to the AC input terminal
block/breaker in the charger (see Figure 1). Tighten connections to torque specified in Table 6. Route AC
wiring at least ¼ inch (6 mm) away from DC wiring, alarm wiring, and the circuit board.
