Why does power to entire house go out when I turn on the microwave
If you're hearing crackling at the service entry, there may be some arcing there and/or in your service panel. This is showing as flickering (interruption to your whole house power supply) and either breaker shutoff or disconnection within your supply wiring or service panel.

These are all potentially major issues in the electrical supply to your house or the wiring within it. It needs to be investigated thoroughly on-site and you should make sure to personally inspect the panel as significant arcing could destroy your breakers, bus bars, etc.