ISO 3795 and FMVSS 302 are two different standards that relate to the flammability of materials used in the interior of motor vehicles.
ISO 3795, titled "Road Vehicles - Burning Behavior of Interior Materials," is an international standard that specifies a test method for determining the burning behavior of interior materials used in road vehicles. It provides guidelines for evaluating the flammability characteristics of materials such as textiles, plastics, and leather, with the aim of reducing the risk of fire propagation within the vehicle.
On the other hand, FMVSS 302, also known as Federal Motor Vehicle Safety Standard No. 302, is a regulation set by the United States Department of Transportation (DOT). It specifies the flammability requirements for materials used in the interior of passenger cars, multipurpose passenger vehicles, trucks, and buses. FMVSS 302 states that the materials should meet certain burn rate criteria when subjected to a standardized ignition source to minimize the spread of fire inside the vehicle.
While both ISO 3795 and FMVSS 302 aim to ensure safer vehicles by regulating the flammability of interior materials, they differ in terms of their scope and jurisdiction. ISO 3795 is an international standard that provides guidelines applicable worldwide, while FMVSS 302 is a U.S. regulation specific to vehicles sold or used in the United States.