United Chargers Nuisance Ground Fault Tripping

Ground-fault circuit interrupter (GFCI) or RCD upstream trips when charging starts, but the charger shows no error.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Cumulative leakage current from charger and other loads, Shared neutral on multiple circuits, Sensitive upstream RCD type, Minor insulation leakage in cable

How to Fix / Troubleshooting

Safety first: Do not bypass or replace protective devices with higher ratings without an electrician’s assessment.

  • Dedicated circuit: Ensure the charger is on its own circuit with a dedicated RCD/GFCI as required by code.
  • Check neutrals: Have an electrician verify that neutrals from different circuits are not tied together downstream of the RCD.
  • Inspect cable: Look for damage or moisture that could increase leakage.

If nuisance tripping persists, consult an electrician about using an RCD type compatible with EVSE loads and have the charger inspected for leakage.

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Repair Difficulty

Hard 4/5
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