UL 458-2009 pdf download – Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts.
2.15 PORTABLE POWER INVERTER – A power inverter that has no provisions for permanent mounting or wiring, and can be easily carried or conveyed by hand. 2.16 POWER-CONVERTER OR POWER-INVERTER SYSTEM – An integral combination of a converter or inverter, power-supply assembly, branch-circuit breakers, grounding bar, marking, and the like, that are necessary for a complete installation. 2.17 POWER SUPPLY ASSEMBLY – Conductors, including grounding conductors insulated from each other, connectors, attachment plugs, and all other ttings, grommets, or devices installed for the purpose of delivering energy from a source of supply to a power-converter or inverter system of a land vehicle or marine craft.  2.19 PRIMARY CIRCUIT – Wiring and components that are conductively connected to a branch circuit or an alternating-current motor generator set installed separately from, or included as, a part of a power-converter or power-inverter system.  2.21 PROTECTED ENVIRONMENT – Areas internal to the equipment that are resistant to entry of carbon dust, or other conductive contaminants, and the like. 2.22 PROTECTED ENVIRONMENT ENCLOSURE – A part or total enclosure of an appliance that is constructed as dened in Section 7, Enclosures Used for Protected Environments, so as to maintain a protected environment.
2.26 RISK OF INJURY TO PERSONS – A condition that exists when stationary parts (such as sharp metal edges and projections), moving parts (such as gears, chains, or linkages), falling objects, inadequate mechanical strength of material, or the physical instability of the equipment are such that injury to persons may result. 2.27 SAFETY CIRCUIT – Any primary or secondary circuit that is relied upon to reduce the risk of re, electric shock, injury to persons, or electrical energy – high current levels. For example, in some applications, an interlock circuit is considered to be a safety circuit. 2.28 SECONDARY CIRCUIT – A circuit conductively connected to the secondary winding of an isolating power supply transformer. 2.29 SERVICE PERSONNEL – Trained persons having familiarity with the construction and operation of the equipment, and the risks involved, who may periodically open an appliance to repair or maintain electrical or mechanical components. 2.30 STAND ALONE UNITS – Units that are intended to be permanently mounted in place but not recessed in the wall. 2.31 STATIONARY UNIT – Cord- and plug-connected units that are not xed and are not movable. A stationary unit may have provision for attachment in accordance with this standard.