The receptacles have a built-in shutter system designed to prevent foreign objects such as pins, keys or nails, from touching the live electrical wires. The shutters automatically open when the two prongs of an electrical plug are inserted in the receptacle. "But if you try to put something in just one [of the outlet slots], it won't work," explained Stephen Brown of the CSA.
Over the course of a six-year study, researchers found that 365 children in Canada received electric shocks by sticking objects into household electrical outlets. Many parents have tried to make their homes safer by placing plastic covers over electrical outlets. But such covers can still be removed by curious kids. The new code "will certainly protect many, many children who have not been protected until now," Mr. Brown said.