hey guys just a quick question..im wiring my shed and was gonna put a 30amp panel out there power a circuit of lights ( 5 lights ) circuit of plugs ( 6 or 8) and a oil furnace ( double poll 20A), but my question is, i got a 100 A panel of a friend to put out there but is it ok to put a 30amp breaker in that as a main breaker and run that of a 30A breaker from the house?? or any ideas on what i can do?? p.s i have a 125 am panel in my home and only want to run 30 A to the shed
30 amps is a pretty small sub panel. Since you are going to dig a trench and you have a 100 amp panel, why not go bigger?
What ever you decide you need a 4 wire feed to the shed, 2 hots, neutral and ground . UF cable or conduit with THWN cable; size (gauge) of wire depends on the size breaker (capacity) you want in the main panel. You also need 2 ground rods at the shed. Depth of bury is 18" for conduit, 2 feet for cable.
Coastal South Carolina
Does the 100a panel have a main breaker ?
And are the lugs rated for #10 wire ?
If so you can use a 30a breaker in the house to feed the 100a panel
The 100a breaker does not need to be removed/replaced