future proofing for 220.. box size

[Orionrising]

working on my woodhop/ garage now.

I currently do not own anything 220, but want to be prepared so I am gonna put in some blank boxes with 10 ga homeruns to hang by the panel until needed.

Should I run 10/3? is anything gonna need a neutral?

2 gang or 1 gang boxes?

 

[pattenp]

I'll just say I've never needed a 240V circuit that also supplies 120V. I have 240V only outlets. Use the larger box. Makes it a lot easier wiring up those 240V outlets.

 

[The Cobbler]

.... is anything gonna need a neutral?

2 gang or 1 gang boxes?

neutral only only if the equipment is 240/120 such as a stove .
2 gang box won't add too much to your cost and it makes for inexpensive opportunity down the road

I'm planning on my build this spring and my intention is to run 12/3 home run to all receptacle so I have opportunities down the road.
I may run a few 10/3 too because I have a fair bit of it laying around

 

[teamextreme]

While I commend your forethought and planning, running #10 for a potential future load you don't know anything about may be wasting your time. In reality, quite a few 240v loads require larger than 30a circuits (welders, many compressors, etc). You might be better served by running an empty conduit out of the panel that you can pull whatever size wire you need down the road. Run a 1" and it should accommodate any future needs.

 

[Falcon67]

Buy a decent size panel in the first place - at least a 20 slot. Feed it well. Put the in a spot where you can make the wall space above the panel removable for access, and possibly an access scuttle in the ceiling above the panel. I would not buy and run 10 gauge wire until I had a target - it's just too expensive. I have 4 240V runs and only one required 10 gauge wire.