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How hot should the cable between my 14-50 adapter and the head unit get? Mine is very warm but not so hot that I cannot hold it. Is this OK?
How hot should the cable between my 14-50 adapter and the head unit get? Mine is very warm but not so hot that I cannot hold it. Is this OK?
How hot should the cable between my 14-50 adapter and the head unit get? Mine is very warm but not so hot that I cannot hold it. Is this OK?
I decided to check the temp on my UMC and 14-50 adapter. Charging at 40 amps with about 75 miles range available. It was pretty hot so I went and got my laser temp gun to see just how hot it was. First off this is in Florida and it was about 73 degrees. The hottest part was at the 90 degree bend were the cable starts from the charge adapter end of the UMC (14-50 end) it was 175 degrees there. The cable below was about 135. Box on UMC was 105 closer to the car the cable was also about 105. That seems ok but the portion that plugs into the outlet seems to be to hot possibly.
I lowered the amps to 25 for the rest of the night.
Just wondering if anyone else has measured?
Outlet is outside adjacent to my main entrance panel.
I decided to check the temp on my UMC and 14-50 adapter. Charging at 40 amps with about 75 miles range available. It was pretty hot so I went and got my laser temp gun to see just how hot it was. First off this is in Florida and it was about 73 degrees. The hottest part was at the 90 degree bend were the cable starts from the charge adapter end of the UMC (14-50 end) it was 175 degrees there. The cable below was about 135. Box on UMC was 105 closer to the car the cable was also about 105. That seems ok but the portion that plugs into the outlet seems to be to hot possibly.
I lowered the amps to 25 for the rest of the night.
Just wondering if anyone else has measured?
Outlet is outside adjacent to my main entrance panel.
FWIW, I had measured temperature rise at various points a while back. Below is a screenshot of my compiled results:
I'll measure my temps as well and report in a week or so.
For typical overnight charging, I would not use the full 40 A capability, espically if it is running that hot. If you set the car at 32 A, you are stressing the system less and should be done charging by the time you are ready to leave in the morning.
I am curious about the temperature you get with the cable stretched out instead of coiled. I have noticed that my 100' 120 V extension cord seems to get hotter when it is loosely coiled up, instead of stretched out. The coils should increase inductance, and therefore increase AC impedance, but I don't know if the effect would be noticeable or not.
Main length of cable hanging on wall organizer was HOT. I did a rudimentary test with an instant read meat thermometer in between the coils of cable on the organizer and read just under 130 degrees F. I would suspect the actual temperature is probably a bit higher based on how I measured it (need to bust out my FLIR One). This was somewhat alarming and is the reason for my question here. The cables are not tightly coiled FWIW. Similar to how Tesla shows it on their website, if not looser.
The remaining length of cord and the connector to the vehicle were only slightly warm.