Could be your wiring has been nibbled by rodents and the insulation has decided to break down. Or it’s run under a carpet and someone has nailed through it. Or constant walking over it under the carpet has worn it away …
Could be your wiring has been nibbled by rodents and the insulation has decided to break down. Or it’s run under a carpet and someone has nailed through it. Or constant walking over it under the carpet has worn it away …