UL 1838:2020 PDF Download

The UL 1838:2020 standard is titled "Standard for Low Voltage Landscape Lighting Systems" and it sets the requirements for low-voltage landscape lighting systems and their components. The standard applies to power units, low-voltage cables or cords, and luminaires used in landscape lighting systems. These components must be installed in compliance with the National Electrical Code, Article 411.

The power units covered by this standard have maximum output circuit voltages as specified. Each output circuit of a power unit is rated for a maximum of 25 A and 300 VA. The standard also covers luminaires and other system components that are designed for use on circuits rated at a maximum of 25 A and 300 VA.

The luminaires and low voltage system components covered by this standard are intended for outdoor locations such as gardens, walkways, patios, etc. They can also be used in certain indoor locations like atriums and shopping malls. The power units can be installed indoors or outdoors, as specified by their markings.

Additionally, this standard covers luminaires and system components that can be submersed in or float on portable self-contained fountains, ponds, and other natural or artificial bodies of water within the scope of Article 682 of the National Electrical Code. The requirements for use in ponds and other bodies of water covered by Article 682 are also applicable to luminaires and components used in other bodies of water.

However, it's important to note that the luminaires and low voltage system components covered by this standard are not suitable for use in swimming pools, spas, or other bodies of water intended to contain immersed persons. For these locations, the requirements of the Standard for Underwater Luminaires and Junction Boxes (UL 676) apply.

Furthermore, fluorescent and high intensity discharge lighting systems are investigated in accordance with this standard and the applicable requirements of the Standard for Luminaires (UL 1598). Light emitting diode (LED) components and subassemblies, such as drivers, control gear, and LED arrays, must comply with the applicable requirements of the Standard for Lighting Emitting Diode (LED) Equipment for Use in Lighting Products (UL 8750).