UL Standard for Safety for Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts
|Publication Date:||14 December 1993|
These requirements cover fixed and stationary power converters, power-converter systems, and accessories having a rated nominal input of 120, 120/240, or 240 volts, alternating current and a nominal output of 24 volts or less, direct current. These converters are intended for use within land vehicles where not directly exposed to outdoor conditions, and are intended to be employed in accordance with the National Electrical Code, NFPA 70.
These requirements also cover fixed, stationary and portable power inverters and power-inverter systems having a dc input and a 120 or 240 volts ac output. These inverters are intended for use within land vehicles where not directly exposed to outdoor conditions, and are intended to be employed in accordance with the National Electrical Code, NFPA 70.
These requirements also cover converters/inverters
Power converters covered by Part I of this standard are intended for connection to established 15- and 20-ampere branch circuits within a recreational vehicle.
Power-inverters covered by Part I of this standard are intended for connection to a 12- or 24- volt dc battery supply.
Power-converter systems and power-inverter systems covered by Part II of this standard are intended for direct connection to a power-supply assembly and incorporate means for the connection of a maximum of three line-voltage branch circuits only, not including the main disconnect. Power converter systems and power inverter systems also employ circuitry as described in 1.4, and 1.5, or 1.5.
Power-converter systems and power-inverter systems shall also comply with the applicable requirements for a Class CTL panelboard in the Standard for Panelboards, UL 67.
Converters and inverters incorporating provisions for the connection of more than three line-voltage branch circuits are judged under the requirements in Part I of this standard and the applicable requirements for a Class CTL panelboard in accordance with the Standard for Panelboards, UL 67.
Each pole of a multiple-pole circuit breaker is a separate circuit.
A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements to determine that the level of safety as originally anticipated by the intent of this standard is maintained. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard shall not be judged to comply with this standard. Where appropriate, revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.