Just call an electrician and ask! Older homes may have different materials used for the wiring that are no longer considered appropriate. I think they used to use aluminum, but an electrician can come out and pig-tail the outlet boxes and switch boxes to take care of that. I think that's what they call it, "pig-tail". Call an electrician and ask what they do during an inspection. I'm sure they'll answer that simple question over the phone for free. If they won't, find a different electrician.