STANDARD FOR SAFETY Tests for Flammability of PlasticMaterials for Parts in Devices and Appliances

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UL 94 STANDARD FOR SAFETY Tests for Flammability of PlasticMaterials for Parts in Devices and Appliances1 Scope1.1These requirements cover tests for flammability of polymeric materials used for parts in devices andappliances. They are intended to serve as a preliminary indication of their acceptability with respect toflammability for a particular application.1.2The methods described in this Standard involve standard size specimens and are intended to beused solely to measure and describe the flammability properties of materials,used in devices andappliances，in response to a small open flame or radiant heat source under controlled laboratoryconditions.1.3 The tests in the Standard for Tests for Flammability of Small Polymeric Component Materials shouldbe used to evaluate small components which contain materials that can not be fabricated intostandardized specimens in the minimum use thickness and subjected to applicable preselection tests inUL94.Test procedures in UL 1694 are applicable to small components with an overall volume of less than2500 mm3 (0.15 in3). UL 1694 is generally not applicable to small components with an overall volumegreater than 2500 mm3(0.15 in3).1.4 The final

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