Jaguar External RCD Nuisance Tripping

Charger trips the upstream RCD/RCBO as soon as a charging session starts, but no specific error appears on the charger.

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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

Combined leakage from multiple circuits on same RCD, Incompatible RCD type with EV charger (e.g., Type AC instead of Type A/F/B), Minor earth leakage in Jaguar wallbox or cable, Moisture in vehicle inlet or cable

How to Fix / Troubleshooting

Safety first: Frequent RCD tripping indicates a potential shock hazard. Do not repeatedly reset without investigation.

  • Step 1 – Isolate other loads: Turn off other circuits on the same RCD and test the charger alone. If tripping stops, total leakage may be too high.
  • Step 2 – Check RCD type: Confirm that the upstream RCD/RCBO is of a type recommended for EV charging (often Type A or B). Replace if unsuitable.
  • Step 3 – Inspect for moisture: Check the Jaguar cable, plug, and vehicle inlet for moisture. Dry thoroughly before retesting.
  • Step 4 – Insulation testing: Have a qualified electrician perform insulation resistance tests on the charger circuit and cable.
  • Step 5 – Separate protection: Consider dedicating a separate RCD/RCBO to the Jaguar charger circuit to avoid cumulative leakage from other loads.
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Repair Difficulty

Hard 4/5

Required Part

Upstream RCD/RCBO for Jaguar Wallbox Circuit
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