Connect Wiring

To connect the wiring to the station, follow these instructions:

Follow these guidelines :

Use copper conductors only.

Do not provide GFCI Ground-Fault Circuit Interrupter protection at the panel. The CT4000has built-in GFCI Ground-Fault Circuit Interrupter protection.

In areas with frequent thunderstorms, add surge protection at the service panel for all circuits. Use new circuit breakers only.

Ensure all power and ground connections (especially those at the breaker) are clean and tight. Remove all oxide from all conductors and terminals before connecting wiring.

Although neutral is not used by CT4000 charging stations, neutral is used in the rest of the world. System neutral must be bonded to ground in the system so that all line to ground voltages are defined. Line to ground maximum voltages must never exceed 132 V.

Review Electrical Input and Output

Refer to the Datasheet for electrical input and output specifications.

Review Wiring Diagrams

The wiring diagrams that are below show wiring for installing a dual port CT4000 on a dual circuit. Two dedicated circuits are required. ChargePoint recommends installing each station with its own two-pole 40 A breaker, unless it is configured for operating at reduced power.

CT4000 can run on 208/240 V circuits from 20 A to 40 A and will deliver a maximum of 30 A to a vehicle. Since CT4000 supports lugs up to 16 mm² (6 AWG

American Wire Gauge), we recommend running 16 mm² (6 AWG

American Wire Gauge) wire for potential upgrade to higher power chargers in the future.

Grounding Requirements

The CT4000 must be connected to a grounded, metal, permanent wiring system. An equipment- grounding conductor must be run with circuit conductors and connected to an equipment-grounding terminal or lead on the CT4000.

A grounding conductor that complies with applicable codes must be grounded to earth at the service equipment or, when supplied by a separate system, at the supply transformer.

Ensure that a grounding conductor that complies with all applicable codes is properly grounded to earth at the service equipment or, when supplied by a separate system, at the supply transformer.

The voltage of either line, relative to ground, must not fall below 80 volts or a Floating Line Connection error occurs. Because the voltage of either line relative to ground must not be allowed to fluctuate, use only center-grounded systems. Neutral is not used to power the station but must be properly connected to ground, at the panel or transformer, to provide the necessary voltage reference relative to ground.

In a Wye system, connect the station to any two lines, as shown.
In a Delta system, connect the station to a center-tapped secondary only, where the center tap is bonded and the station is connected to the L1 and L3. This allows voltages to remain constant regardless of other loads that may be using the lines.

Connect to these Systems

To ensure proper operation and compatibility, connect the charging station only to the following electrical systems:

120/240 V AC

1Ø Bonded Neutral Station is connected to L1 and L2.
Neutral is not used.

120/208 V AC

3Ø Wye Bonded Neutral Station may be connected to any two lines.
Neutral is not used.

120/240 V AC, 3Ø Delta

Not recommended for new construction

Center tap grounded
Bonded neutral
Station must be connected to L1 and L2 only
Do not connect any part of the system to L3
Neutral is not used

Do Not Connect to these Systems

To prevent equipment damage or malfunction, do not connect the charging station to the following electrical systems:

120/208 V AC 3Ø Wye

Ungrounded Floating neutral
Voltage of either line to ground is undetermined
Neutral is not grounded

120/240 V AC 3Ø Delta, corner-grounded

Wiring for Dual or Single Port Stations

If the station is being configured for circuit sharing, go to Power Sharing.

Strip wires 13 mm (0.51 in).
Cut wires straight across at 90° and not at an angle.
Push the black tab (a) on the terminal block to release the terminal block cover.
Slide the cover up until it locks into the raised position.
Lift all applicable levers on the terminal block.
Insert the ground wire into the center connector (GND Ground).
Push the center lever down until it clicks into its fully closed position.
Insert the 240 V AC L1 and L2 wires.
Push the levers down until they click into their fully closed position.

Wiring Diagram

240 V AC 1Ø Panel

Labeled diagram of product, tools or parts.

Main Breaker
Neutral Bus
Ground Bus
Neutral
L2
L1
Left L1
Left L2
Right L1
Right L2
Ground
Left Port
Right Port
Strip wire 13 mm (0.51 in)
Local Service or Subpanel
120/240 V AC 1Ø

Bonded Neutral Required

Left and right refers to the left and right ports on the charging station.

For wiring for dual or single port stations, follow the steps below:

Single Port Wiring

Inserting the single port wiring in Single port wiring fully inserted in

208 V AC 3Ø Panel

Main Breaker
Neutral Bus
Ground Bus
Neutral
L3
L2
L1
Left L1
Left L2
Right L1
Right L2
208 V AC
Right Port
Left Port
Strip wire 13 mm (0.51 in)
Local Service or Subpanel
120/208 V AC 3Ø

Bonded Neutral Required
Each 40 A, 2-Pole

Breaker may be connected to any two lines