Final answer:
The emergency generators should be run under full load for at least 30 minutes to an hour when testing them every week.
Step-by-step explanation:
In order to test the emergency generators every week, it is important to run them under full load for a certain period of time. The duration for which the generators should run under full load can vary depending on factors such as the capacity of the generators and the requirements of the system they are powering.
However, a common recommendation is to run the generators under full load for at least 30 minutes to an hour. This allows for the generators to be tested thoroughly and ensures that they are capable of supplying the required power in an emergency situation.
It's also important to follow any specific instructions or guidelines provided by the generator manufacturer or the system operator for the testing of the emergency generators.