It might be a good idea to have everything checked out.A lot of old houses have the polarized outlets hooked up backwards.Poor,or no grounds also.A friend of mine had a historical house that had fuses in the neutral,and grounds!
They also soldered connections with acid core solder causing corosion,resulting in a poor dangerous connection.
They also soldered connections with acid core solder causing corosion,resulting in a poor dangerous connection.