1.1 These requirements cover portable adapters rated 24 V dc or less that are intended to be supplied from the battery-powered electrical system of a vehicle and used in accordance with the National Electrical Code, NFPA 70. Connection to a vehicle electrical system in which the vehicle chassis is connected to the negative side of the battery supply is by means of a connector intended for insertion into a cigarette lighter receptacle or power outlet. Vehicle battery adapters may supply outputs for appliances such as portable radios, tape players, battery chargers, and tools. 1.2 Products covered by this standard include:a)Cord assemblies consisting of the connector for insertion into a cigarette lighter receptacle, adjacent cord, and connector intended for connection to an appliance; andb)Units consisting of the connector for insertion into a cigarette lighter receptacle, adjacent cord, and permanently attached filtering or regulating circuitry which may include an additional enclosure, output cord, and connector or battery receptacle.1.3 This standard does not cover products intended for marine use in areas where ignition-protected equipment is required. 1.4 Power inverters intended to be supplied from the cigarette lighter receptacle of a vehicle are covered by the requirements in the Standard for Power Converters/Inverters and Power-Converter/Inverter Systems for Land Vehicles and Marine Craft, UL 458.