What are the necessary steps for a 100 amp sub panel installation?

The necessary steps for a 100 amp sub panel installation include:

1. Planning the location and size of the sub panel.
2. Turning off the main power supply.
3. Installing a new circuit breaker in the main panel.
4. Running conduit and wiring from the main panel to the sub panel.
5. Connecting the wires to the sub panel and grounding it properly.
6. Testing the installation to ensure it is working correctly and safely.