Hire a licensed electrician and follow local electrical codes
Determine whether you need a transfer switch or interlock kit
Choose the correct generator size for your essential loads
Install the generator outdoors on a level surface away from doors and windows
Use a properly rated inlet box and outdoor power inlet
Run a generator cord from the generator to the inlet box
Connect the inlet box to the transfer switch or interlock panel
Turn off the utility main breaker before connecting generator power
Start the generator and let it stabilize
Switch selected circuits to generator power through the transfer switch or interlock
Monitor load usage to avoid overloading the generator
Refuel only with the generator turned off and cooled down
Shut off generator circuits before stopping the generator
Return the transfer switch or interlock to utility power when utility service is restored