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This document specifies requirements for the electric propulsion systems and components with maximum working voltages according to voltage class B. It does not apply to high voltage battery packs (e.g. for traction) and systems or components inside. It describes the potential environmental stresses and specifies tests and requirements recommended for different stress levels on/in the vehicle. This document contains definitions and general requirements. Like all other parts of the 19453 series, it is not intended to apply to environmental requirements or testing for: — wiring harnesses, cables and electrical connectors; — parts or assemblies inside an equipment, if not otherwise specified; — system integration of equipment and system validation on vehicle level, if not otherwise specified in a test requirement.