EV Charger Plug fire - be careful! (Input requested. Link to pics below).

Dodged a full house fire last night. Outlet completely melted. Fire burned casing and wall, but went out on its own.

Equipment:

  • Siemens versicharge 240/30A plugged into a NEMA 6-50 in a drive under garage.
  • Dedicated line with 40A fuse
  • Professionally installed during home construction.

Events:

  • Charged friends MS 100D for 8 hrs during the day
  • Charger rested for 1.5 hrs
  • Plugged in a MS 75 to top off for the evening
  • MS charged for a few hours then breaker tripped

Next morning I go out to find this near catastrophe.

Very scary. Melted box, all wood is charred.

Curious if I need to replace the entire wire (which is run through about 50 feet of walls in my house).

I read that EV chargers should be hardwired to avoid fault points like a plug.

Also read that most NEMA plugs aren’t intended to handle current for long periods of time (designed for a few hours running a dryer).

Electricians coming tomorrow.

Welcome any comments about how to protect myself in the repair/ reinstallation.

I’m likely going to hardwire the charger (no plug) and look into adding a temperature sensor or something - and definitely a fire sensor.

Link to pictures of failed plug: https://imgur.com/gallery/2joUiOp

  • schenkzoola@alien.topBEnglish
    1·
    1 year ago

    It needs to be shouted from the rooftops: “Wall mounted EVSE’s must be hardwired!”

    I also feel that a lawsuit should be filed against the receptacle manufacturer. The cheap Leviton receptacles fail in this manner in a short timeframe. It’s happened to you, it’s happened to me.

    Portable EVSE’s get a pass since they are plugged in and out frequently. The connection points can be inspected for damage when routinely unplugged. They also typically have a temperature sensor in the plug.