I know it's not to code, but in retrospect I should have ordered my Zencar EVSE with a 26A setting, rather than the 24A setting, for my 30A circuit.
At 24A, the cable never even gets warm. Also, the 14-30R is right beside the panel, so it's a super short run. I realize 26A exceeds 80% of 30A, but I seldom if ever charge for more than 3 hours continuously, usually for less than 90 minutes.
24A is safer though and provides 87% of the full charging rate, whereas 26A would provide 95% of the full charge rate.
As jjeff mentioned, the actual draw, shown on the Zencar's display, is always a bit under the set point which adds a margin of safety