Insulating around receptacles

[DirtyLittleSecret]

What's the general "rules" for insulating around receptacles?  I'm presently insulating the cabin with rigid foam, and am wondering if there's a minimum "clearance" required...currently the deep receptacle boxes are sitting in front of 2" foam boards (2x6 framing).  Hope to get it hooked up to the grid next month.
much appreciated!

[rocking23nf]

While I cant comment on foam boards as I have never used them. The one mistake that alot of DIYers make is to not put a vapour box behind the receptical.