From the 744 QRH Instructions:
Flight crew reset of a tripped fuel pump circuit breaker or refuel circuit breakers is prohibited. In flight, reset of any other tripped circuit breaker is not recommended. However, these other tripped breakers may be reset once, after a short cooling period (approximately 2 minutes), if in the judgment of the captain, the situation resulting from the circuit breaker trip has a significant adverse effect on safety. On the ground, flight crew reset of any other tripped circuit breaker should only be done after maintenance has determined that it is safe to reset the circuit breaker.