Check local electrical codes and obtain required permits
Determine the shed’s power needs and planned circuits
Decide whether to run a feeder from the main panel or use a subpanel
Verify the main panel has enough capacity for the added load
Call utility locating services before digging
Choose the wiring method and cable type approved for underground or overhead use
Plan the route from the house to the shed
Dig a trench to the required depth if running underground
Install conduit if required by code or preferred for protection
Pull the correct size conductors through the conduit or use approved direct-burial cable
Install a dedicated breaker in the main panel
Install a disconnect and subpanel in the shed if needed
Run a grounding system for the shed as required by code
Bond and ground equipment properly
Install outlets, switches, and fixtures in the shed
Use GFCI and AFCI protection where required
Seal all exterior penetrations and protect all exposed wiring
Backfill the trench after inspection if required
Test the circuit for proper voltage, polarity, and grounding
Have the work inspected if required by local code
Hire a licensed electrician if you are not fully qualified to do the work safely