an outdoor backyward Cabana/Shed which is 75 foot run from the main panel. I was advised by a Home Depot rep to run 10/2 underground wire in 3/4" PVC (18" deep trench) to a Siemens 30A sub panel. This sub panel disconnect switch
has 2 x 15a screw in fuse/mini-breakers. I will be running 3 x 50W pot lights, 2 x 60w shed lights, bar fridge and a couple of general use duplex outlets
for radio or other random 110v items (all won't be on at the same time). Ideally I would like to have 2 x 15a circuits .....1 for the cabana bar area (fridge, pot lights, etc) and 1 circuit for the shed part of the building (2 ceiling lights and 2 duplex outlets. There is no need for 240v in this building ....ie tools, etc.
1) Do I use a single breaker 30a (for 120v) at my main panel or double breaker 30a (for 240v) with this Siemens disconnect switch in the cabana/shed?
2) If I use a single 30a breaker for this 10/2 wire, can I get 2 15a circuits from this sub panel? The panel has 2 line lugs and a ground block. How do I wire this properly?
3) Do I even need 30a breakers at my main panel or would 20a single breaker suffice? If so, how would I use this 30a sub panel/switch or do I need it in this case? If not, how would I wire the building?