Ingineer: So your maximum temperature scanned = 141 deg F = 61 deg C, which is well below the 105 deg C rating of the car inlet power cables and the 90 deg C rating of the supply cable.
I'm guessing the ambient temperature is approximately the lowest temperature shown on the RHS (60 deg F = 16 deg C). If correct, then the maximum contact temp rise is also of interest to look at: in deg C have 61 - 16 = 45 deg C temp rise on the hottest inlet contact and 58 - 16 = 42 deg C temp rise on the hottest supply contact, both of which are less than the J1772 contacts maximum temperature rise of 50 deg C, but not by much. Of course it would be of interest to see if using other 30a EVSEs in comparable charging sessions show similar contact temperature rises.
I am struck by the fact that (visually at least) the temperatures of the two contacts aren't more nearly the same for the RAV4 since the current passing through each should be the same. It would be interesting to see other tests to see if this difference is consistent or if it varies by, say, how the nozzle is inserted, etc.
Comparing car inlets, since the LEAF inlet appears to have more solid material between the 5 holes for the contacts than that of the RAV4, it might support the nozzle more securely, i.e. allow less flexing of the inlet plastic and so provide for better contact mating, i.e. lower resistance and so consistently less contact heating during charging.
I'm guessing the ambient temperature is approximately the lowest temperature shown on the RHS (60 deg F = 16 deg C). If correct, then the maximum contact temp rise is also of interest to look at: in deg C have 61 - 16 = 45 deg C temp rise on the hottest inlet contact and 58 - 16 = 42 deg C temp rise on the hottest supply contact, both of which are less than the J1772 contacts maximum temperature rise of 50 deg C, but not by much. Of course it would be of interest to see if using other 30a EVSEs in comparable charging sessions show similar contact temperature rises.
I am struck by the fact that (visually at least) the temperatures of the two contacts aren't more nearly the same for the RAV4 since the current passing through each should be the same. It would be interesting to see other tests to see if this difference is consistent or if it varies by, say, how the nozzle is inserted, etc.
Comparing car inlets, since the LEAF inlet appears to have more solid material between the 5 holes for the contacts than that of the RAV4, it might support the nozzle more securely, i.e. allow less flexing of the inlet plastic and so provide for better contact mating, i.e. lower resistance and so consistently less contact heating during charging.