Symptoms
- Cable feels warm to the touch during charging
- Connector or plug end feels hotter than the rest of the cable
- Smell of burning or melting plastic
- Charging is slower than expected alongside the heat
Likely causes
- CommonNormal warmth from higher-power chargingCables carrying significant current, especially at higher amperage settings, can feel warm to the touch as normal operation.
- PossibleLoose connection at the plug or outletA loose connection increases resistance, which generates excess heat at that specific point.
- PossibleWorn or damaged outlet or wiring (home charging)An aging outlet or undersized wiring not rated for continuous EV charging load can overheat.
- Less commonDamaged cable insulation or internal wiringPhysical damage to the cable can cause localized overheating and is a fire risk.
What to do
- Feel the cable at multiple points; mild, even warmth along the cable during charging can be normal.
- If one specific spot, especially the plug or connector, feels distinctly hotter than the rest, stop charging and unplug once safe to do so.
- Check that the wall outlet, if using one, is not loose, discolored, or warm itself, which suggests a wiring issue rather than the cable.
- Inspect the cable for any visible damage, cracks, or exposed wiring.
- If you smell burning plastic or see discoloration, stop use immediately and do not use that cable or outlet again until inspected.
- For home charging on a dedicated circuit, hire a licensed electrician to confirm the outlet and wiring are rated for continuous EV charging load.
Tools and parts
Replacement charging cableSearch: “EV charging cable replacement, correct amperage rating for your charger”
When to call a pro
A licensed electrician should inspect any outlet or wiring found to be excessively hot; the manufacturer should replace a cable with damaged insulation.
Safety
Use caution
Excessive heat, discoloration, or a burning smell at a plug or outlet is an electrical fire risk; stop charging and have it inspected before using again.