ChargePoint® Charging Stations
A-4
Grounding Requirements
The voltage of either line, relative to ground, must not fall below 80 volts. 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.
Connect to these systems
In a wye system, connect the station to ANY two lines, as shown below.
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 L1 and L3. This allows voltages to remain constant regardless of other loads that may be using the lines.
Do not connect to these systems
Do not connect ChargePoint stations to the following types of power sources:
•
120/208 VAC 3 phase wye, ungrounded
•
120/240 VAC 3 phase delta, corner-grounded
•
Any system where the center point of the AC power source is not grounded
NOT FOR NEW INSTALLATIONS
