Specimen of an attachment plug or current tap molded to a length of cord no more than 6 inches long is to have a line scribed on the both sides the device. Blades are positioned downward through a hole in a 1/4-inch thick steel plate mounted horizontally within an air circulating oven that has been heated to 60℃,A weight with 10 lbf is attached to each of the individual line blades. Have the temperature of oven increase an maintain at 60℃ for 4 hours; after that remove the specimen to enable it cooling down to room temperature. The displacement of the blades from there original position should not exceed 1/16 inch.
