There are three type of outlet available in the market. Homeowner grade, the most cost effective , is that the commonest sort of outlet for installation during a builder-grade home. However, they're flimsy and tend to wear call at 5-10 years at the foremost . Once you do install or replacement of electrical outlets, select commercial grade instead – these cost about 50 percent quite the cheaper kind, but the financial difference is insignificant and that they will remain last 100 years under different home use conditions. Hospital grade are very expensive, costing ten times the worth of homeowner quality, and are really not necessary; they're designed for never-fail use in medical facilities, for instance to power breathing machines.