Final answer:
NEMA 4 is the NEMA classification that can withstand the highest temperatures.
Step-by-step explanation:
The NEMA classification that can withstand the highest temperatures is NEMA 4.
NEMA 4 enclosures are designed to protect against water splashing from any direction and can also withstand high temperatures.
On the other hand, NEMA 1, NEMA 7, and NEMA 12 do not have specific temperature ratings and are not designed to withstand high temperatures. Therefore, the correct answer is NEMA 4.