UL499 CL8 Stability
8 Stability
8.1 The stability of a heating appliance shall be such that it will not be overturned readily during use.
8.2 A portable household heating appliance in which liquid is heated to a temperature greater than 115°F(46°C) is to be placed on a plane inclined at an angle of 15 degrees to the horizontal. The product is to be positioned and loaded with whatever combination of separable components, liquid, or other media(material) that results in the maximum tendency to overturn under conditions of intended use. The product is to contain at least 5 oz (148 mL) of liquid. The product is to be prevented from sliding on the inclined surface. The product shall not overturn as a result of this test