Yes, old home wiring can be upgraded. With modern technologies and devices, we require more from our home wiring and electrical systems than we did in the past. Older wiring setups are not adequate to meet these requirements. There are many factors to consider before you begin a wiring upgrade. It is a complicated job and it can mean tearing apart some of the house, such as walls and floors, but the benefits are usually worth the trouble. It is advisable to get a permit beforehand, and as with all home wiring jobs, it is a good idea to consult a certified electrician to help you.