A scope is way far overkill for normal wiring. It might be handy if you were looking for EMF spikes but most AC wiring is so "dirty" anyway that you will always be chasing ghosts.
I love my scopes and I I try to find uses for them but it is mostly just looking at gee whiz stuff like my dimmer and CT experiments.
Now if you have a real fast scope, you can do TDR with it to find that drywall screw in your CAT 5
The tool I do like in my bag is a clamp on ammeter with the capacitor checker, diode and all the VOM functions.
It is typically what an HVAC guy carries.
