Verify Station Wiring and Voltage

To verify the station wiring, voltage readings and connection, follow these steps:

Tools Needed

	T10 Security screwdriver		Alligator clip leads or pass-through leads (optional)
	Solenoid Voltage Meter (Wiggy)		Digital Multi-Meter (DMM)

You must be a licensed electrician and complete online training to become a ChargePoint certified installer. If you do not complete training, you cannot access the ChargePoint network to complete installation. Find online training at: https://www.chargepoint.com/partners/training-certification. If the charging station is not installed by a ChargePoint certified installer, using a ChargePoint approved method, it is not covered under warranty and ChargePoint is not responsible for any malfunctions.

Station Wiring Checks

Using a T10 Security screwdriver, remove the screws fastening the faceplate to the bottom of the station.

Retain the screws for reuse.
Lift the faceplate off the charging station.
Use a coin to unlock the wire cover.

Do not use a screwdriver, to avoid damage to the wire cover.
Lift the wire cover off.

Verifying Voltages

Once proper wire placement has been verified, you need to check the voltages and impedances using a Digital multimeter (DMM) in parallel with a Solenoid voltage meter (wiggy).

Since digital meters (DMM) are high impedance devices, the amount of current that flows through the circuit while testing voltage with one is negligible.

Adding the voltage measurements in parallel will confirm that the voltage measurements do not significantly deviate with current flow (unexpected impedance) and are not the result of a "floating" voltage on any wire.
If voltages are not measured with some additional load -- like a parallel wiggy or dummy load -- the values will not confirm useful functionality or impedance, instead they will only verify proper placement of phases and ground. Loaded values must be measured for complete troubleshooting.

Power on the station.
Test each wire relative to each other wire in the block, phase to phase, and phase to ground:
1. First, by connecting the DMM by itself and noting the voltage.
2. Next, by adding the wiggy in parallel and noting the voltage, while there is current flowing (using the alligator clips or pass through leads, if available).
Insert the meter probes into the holes under each lever and check the input voltage as listed in the "Expected Voltage Readings".
Readings with and without the wiggy in parallel should be near 208 V or 240 V (Bonded Neutral Wye or Split Phase) phase to phase and 120 V phase to ground.
- A significant deviation from these values can denote a wiring problem or unsupported supply type, refer to the CPF50 Data Sheet available at ChargePoint Product Reference Documentation.
- A significant deviation from these values only with the wiggy in parallel would indicate an unexpected impedance in the system. This includes any of the following:
  - A possibly worn or damaged beaker (or, pole within that breaker)
  - Corrosion or insufficient bonding of the breaker to the bus bar or the breaker leads
  - Insufficient bonding of neutral to ground at the panel.

Expected Voltage Readings

The following table lists the expected input voltage measurements

Expected Input Voltage Measurements
Connection Points (Measure Between)	Volts (Nominal)
L1 – L2	208/240 V
L1 – GND Ground	120 V
L2 – GND Ground	120 V

Voltage Readings (with the DMM alone)

Record the voltage readings in the below table.

Note down your Voltage Readings in the Results column below along with clear Photos and send the Voltage Readings and the Photos back to ChargePoint's Support. Visit chargepoint.com/support to find your region’s technical support number.

Voltage Readings
Connection Points (Measure Between)	Results: Volts (Nominal)
L1 – L2
L1 – GND Ground
L2 – GND Ground

Voltage Readings (with the DMM in parallel with the Solenoid Voltage Meter)