Electric Cars
Charging Cable Gets Hot: When to Worry
The charging cable or connector feels warm to the touch during charging.
What causes it
Some warmth is normal (resistive losses). A cable that's hot enough to be painful, or the plug discolored, is a real fault.
Normal vs dangerous
- Slightly warm after an hour of charging - normal.
- Hot to the touch (can't hold it) - a problem.
- Discolored or melted plug, burning smell - stop immediately.
What to do
- Stop charging if the plug is too hot or smells.
- Check the socket/wallbox - a worn or loose outlet is the #1 cause of hot connectors.
- Inspect the plug pins for burn marks or pitting.
- Use the correct rated cable - a 10A cable on a 32A wallbox will overheat.
- Check the wallbox amperage - if it's set above the cable's rating, lower it.
Safety rule
A hot connector is a fire risk. If the plug or socket shows any discoloration, replace it and have the wiring checked before charging again.