Thanks for the replies.
1) I recommend to install a 20 amp circuit breaker in your main electrical panel and install a quantity of (4) four 12 AWG Copper wires with all 4 wires being type "THWN" insulated for wet conditions. Install (1) one black and (1) one red for the two hot conductors, (1) one white for the neutral and (1) one green for the equipment ground.
Cap off the red wire inside the main panel and at a junction box inside the shed as it will be for future use. The red wire can be used at a future date in the event you ever need a 2nd circuit either at the shed or at some other nearby location.
2) I suggest to install gray electrical PVC conduit, Schedule 40 as you only want to dig or trench the run one time. Minimal conduit diameter is 1/2" but increasing it to 3/4" diameter will make the wire pull much easier.
The conduit run needs to be buried a minimum of 18" (eighteen inches) below final grade.
Place a warning ribbon tape approximately 6" (six inches) below grade above the entire conduit run to provide a warning that if any future digging in the area will occur, that there is an electrical line buried below.
3) All receptacles both inside and outside of the shed need to be GFCI protected. Exterior receptacles require an "in-use" bubble cover.
4) On the inside of the shed, also install 12 AWG copper conductors for all of the receptacle and switch outlets. If installing NM Romex cable inside the shed, the Romex cable needs to be protected from any possible damage. Suggest installing 1/2" EMT conduit inside the shed on the vertical runs and place the Romex cable into the EMT conduit to protect it from being damaged by tools, lawn mowers, etc.
If you have any additional questions, just let me know and I’ll be glad to answer them for you.
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