Jskolnick

My plug that plugs into outlet from audis home charger gets really hot to the touch after u plug from wall. Anyone else experience this?

ThomasW

Mine got warm but not hot. It measured at a little over 90 degrees Fahrenheit with an ambient temperature in the 60s. If yours gets much hotter there may be an issue with the cable. But it could also be the outlet getting very hot, for example the wiring is not connected properly in the gangbox. Either way, certainly something to take a closer look at before something happens.

drcollie2

You are going to have heat in the cable while charging, it's the nature of 220v 40 amp charging. Now what is "Really Hot"? That needs to be more defined. The wire will be warm, but should not be so hot that you can't hold onto it with your bare hands. If it gets too hot, then the breaker will trip in your electrical panel box.

ThomasW

I agree, this amount of current can generate heat energy. However, with high quality wiring, the generated heat in the cable is minimal. My cable going from the breaker to the socket does not get warm really, only the breaker and the plug/socket connection. Both stay well within specification at 90 degrees in my case. The cable from the Audi EVSE gets warm as they use thinner wires compared to the Juice Box. So depending on how hot it gets could hint at a wiring issue. I would not want to rely on the breaker to trigger as my safety measure. With currents this high I would rather be safe than sorry and take a closer look at what is going on.
I measured the temperatures during the first couple of charging sessions using an infrared thermometer (the ones with the laser pointer) which worked very well. I installed the wiring myself so I know the connections are proper and tight. But if the wires do not make a good connection at the socket or breaker, there will be more resistance and more heat as a result. Down the road the wire could slip out and cause an arc (and then potentially a fire). A standard breaker will not help here as code requires a GFCI not an AFCI, which is designed to detect arcs.