To be certain that electrical devices and cords used in your home are safe, use only UL - listed devices. UL is short for Underwriter Laboratories, an organization that tests electrical devices for safety and functionality. They do all the dirty work for you by testing the devices to the maximum, in order to ensure they are safe for you to use in your home.
Don't settle for anything else like cheap imitations. Without these labels, you're putting your family's safety at risk! Check each electrical device for a UL label before you buy it and also check the ones that are installed in your home now.
The UL makes sure that wire sizes are correct, devices can handle the amount of current they say they can, and they are constructed correctly to provide safe function in your home. For over a hundred years now, this non-profit organization has developed more than 1,000 standards for safety. The UL website is a good place to learn more about the Underwriters Laboratories Inc. and what they do. By going to UL University online, you'll find technical safety data and courses in many areas. You'll find everything from appliance safety to fire safety, to hazardous locations safety.