What is the process for replacing a 200 amp main breaker in a residential electrical panel?

To replace a 200 amp main breaker in a residential electrical panel, follow these steps:

1. Turn off the main power supply to the panel.
2. Remove the panel cover to access the breaker.
3. Disconnect the wires connected to the existing breaker.
4. Unscrew and remove the old breaker.
5. Install the new 200 amp main breaker in the same position.
6. Connect the wires to the new breaker.
7. Secure the breaker in place and replace the panel cover.
8. Turn the main power supply back on and test the new breaker.