UL 2255-2021 pdf download

UL 2255-2021 pdf download.Receptacle Closures.
9 Mold Stress Relief Test 9.1 A receptacle closure shall not show signs of twisting, distortion or other deformation that would affect its ability to be used with a receptacle after being conditioned as described in this Section. Exception: A receptacle closure made ofthermosetting material is not required to be subjected to this test. 9.2 Nine receptacle closures are to be placed in a circulating air oven maintained at a temperature of 70 °C (158 °F) for 7 hours. The devices are to be removed from the oven and allowed to cool to room temperature before determining compliance. 10 Blade Strength Test 10.1 General 10.1.1 The blades of a receptacle closure shall withstand the application of the test forces described in 10.2, 10.3 and 10.4 without cracking or breakage. Permanent deflection of the closure blade or face upon completion of the testing meets the intent of this requirement. 10.2 Vertical blade orientation 10.2.1 Six receptacle closures are to be subjected to this test. Three closures are to be tested as received and three tested after being subjected to the Mold Stress Relief Test, Section 9. Each closure in turn is to be supported with its face fixed in a horizontal plane and its blades projecting downward in a vertical orientation as shown in Figure 10.1. A weight that exerts a force of 20 lbf (89 N) is to be suspended from each blade in succession. The pull is to be gradually applied and held for one minute.
10.3 Horizontal blade orientation, flat of blade 10.3.1 Six receptacle closures are to be subjected to this test. Three closures are to be tested as received and three tested after being subjected to the Mold Stress Relief Test, Section 9. Each closure in turn is to be supported with its face fixed in a vertical plane and its blades projecting horizontally with the flat surface of the blade parallel to the ground as shown in Figure 10.1. A force of 20 lbf (89 N) is to be exerted on the flat surface of each blade in succession, within 3/16 inch (1.9 mm) of the tip of the blade. The force is to be gradually applied and held for one minute. 10.4 Horizontal blade orientation, edge of blade 10.4.1 Six receptacle closures are to be subjected to this test. Three closures are to be tested as received and three tested after being subjected to the Mold Stress Relief Test, Section 9. Each closure in turn is to be supported with its face fixed in a vertical plane and its blades projecting horizontally with the edge of the blade parallel to the ground as shown in Figure 10.1. A force of 20 lbf (89 N) is to be exerted on the edge of each blade in succession, within 3/16 inch (1.9 mm) of the tip of the blade. The force is to be gradually applied and held for one minute.
11 Details 11.1 A receptacle closure shall be legibly and permanently marked, where readily visible, with the manufacturer’s name, trade name, trademark or other descriptive marking by which the organization responsible for the device shall be identified. The manufacturer’s identification shall not be in a traceable code unless the device is identified by the brand or trademark owned by a private labeler. 11.2 If a manufacturer produces receptacle closures at more than one factory, each closure shall have a distinctive marking on the device, that may be in code, by which the device is able to be identified as the product of a particular factory. 11.3 The packaging of a receptacle closure shall be marked with the manufacturer’s identification as described in 11.1 and with a model number or equivalent designation. 11.4 The packaging of a receptacle closure that relies solely upon the closure blades to remain seated in a receptacle shall be marked with the following statement or an equivalent wording after the word “WARNING”: “WARNING: RISK OF FIRE OR ELECTRIC SHOCK. If the closure falls out of or fits loosely in the receptacle, the receptacle contacts may be worn or broken. To reduce the risk of fire or injury caused by overheating, arcing or exposure of live plug blades, do not use the receptacle until it has been examined by a licensed electrician to determine whether the outlet needs to be replaced.”UL 2255-2021 pdf download.