Al,
They are not UL rated for a 65 degree Celsius rise they are UL rated for a 45a current at a maximum of 65 degree Celsius.
Quote:
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UL Rated for 65°C largest wire or cable size
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That is why the graphs only go to a 40 degree Celsius rise because they are basing it on a rise from ambient temp which the industry standard is 25 degrees Celsius. (25 C = 77 F for those of us that aren't that familiar with Celsius)
Using the pulsed current ratings are not really suitable in this case. Certainly they could and usually will see pulsed current in a FRC application but they could also see continuous current or pulses that last for more than a few seconds. As such the design should account for the worst cast scenario so the continuous ratings graphs are applicable.
As I previously stated, yes teams have shown that they "can get away with it", but 1 poster in this thread has indicated that they did indeed fail in a stall situation.