Electrical wiring can last for 50 to 70 years if installed properly at the beginning and then maintained under ideal conditions. However, many factors, such as moisture damage, can shorten this timeframe. Unsustainable use can also reduce the life span of your electrical wiring. Make sure to unplug electronics when they aren't in use and avoid overloading your power outlets. To be safe, also schedule regular electrical inspections, such as every five to 10 years.