2001 blazer electrical problem

no electrical power,everything dead, but battery is good. When this happens, there is also a ticking noisefrom behind the glove box. Wait a few minutes, reinsert key and it starts.
When driving, the instrument panel,clock, radi, compass, turn on and off. Engine keeps on running. Is there a circuit breaker that could be tripping and resetting?

Could be a few things. In this case, the ignition switch seems to be on the top of the list in my opinion. They can wear and cause problems similar to what you are describing.