You can find out roughly how old your wiring is by simply looking at it. If the wiring around your fuse box is covered in old-fashioned casing, or is damaged or fraid, it may be over 25 years old and need replacing. This is more common in older properties or houses that have been empty for long periods of time.
Dunbeath
Dunbeath is a village in south-east Caithness, Scotland on the A9 road. It was the birth place of Neil M. Gunn (1891-1973), author of The Silver Darlings, Highland River etc., many of whose stories are embeded in Dunbeath and its Strath. Dunbeath has an extremely rich archaeological landscape, the site of countless Iron Age brochs as well as an early middle ages reclusive site (see Alex Morrison's archaeological survey, "Dunbeath: A Cultural Landscape".) Of Dunbeath's landscape, Gunn wrote: "These small straths, like the Strath of Dunbeath, have this intimate charm. In boyhood we are familiar with every square backyard of it. We include it physically as well as our memories hold it. Birches, hazel trees for nutting, swimming pools with trout and also a periodically visible salmon, river-flats with the wind on the bracken and going away bunny scuts, a wide range of wild flower as well as tiny bird life, the rising hawk, the unanticipated roe, the ancient graveyard, thoughts of the people that once lived far inland in straths as well as hollows, the past and the present kept in a minute of day-dream." ('My Little Bit Of Britain', 1941.). There is a community museum/landscape analysis centre at the old town institution.