From the mid 1960s until the mid 1970s, aluminum wire was widely utilized in Canada. Aluminum wire was initially adopted because it was less costly than copper wiring. Some homes are entirely wired with aluminum or copper. It is not unusual for both types of wiring to be used in one house. The use of aluminum wiring is now limited to older buildings and those in remote areas where there is no chance of contact with soil. In these cases, an electrician will replace the aluminum wiring with copper wiring over time as part of an overall maintenance program for the home. Otherwise, people will eventually start to notice problems with their electricity - especially if they have any appliances that use a lot of power - because aluminum wiring is very inefficient at carrying current. The main concern with using aluminum wiring is that it is very dangerous if exposed to water. If you get liquid on your skin, you should never try to remove it by scraping your skin against a hard surface. This could easily lead to more serious injuries such as cuts or burns. Instead, gently wash the area with soap and hot water immediately so no time is lost during emergency repairs. If you are working on an old house with aluminum wiring, take special care not to expose any parts of the wiring to moisture or other liquids.