Amazon HDMI HD cable UL safety standard UL758 explainedIntroduction to UL Subject758
We often see the abbreviation of AWM, which refers to the English abbreviation of Appliance Wiring Material. The scope of use of the product in this technical document is covered by the UL Product Catalog, which includes electrical lead wires for use in factory assemblies (elements) or connecting cables, and other occasions where UL has confirmed that they can be used. Single-core and multi-core wires are included in this technical document, which are available in a variety of conductor sizes, insulation thicknesses, and the use of different materials and applications. Products with special uses will usually have a special purpose identification on their labels, reels, or boxes. By affixing the UL approval mark on the label, reel, or smallest unit box, it is possible to identify whether a product has been manufactured under UL approval and post-event supervision.
UL 758, 3rd Edition, May 2, 2014 - UL Standard for Wiring Materials for Safety Appliances.
These requirements cover appliance wiring materials (AWMs) in the form of single insulated conductors, multi-conductor cables, optical fibers, independent insulated conductors, and optical fibers used as building blocks of multi-core cable assemblies.
The appliance wiring materials covered by the requirements of this standard are used only as factory-installed cabling within the overall enclosure of appliances and other equipment (internal wiring) or as external interconnect cables for appliances (external wiring), or for further processing as components in multi-core cables.
These requirements do not cover any wire, cable, or wire type currently covered in the National Electrical Code (NEC), NFPA 70, and are not intended to be installed in a building or structure in accordance with the NEC, except in the installation instructions for the end product intended for use.
These requirements cover electrical wiring materials with an operating temperature rating of at least 60°C (140°F) for a dry temperature and a voltage rating of at least 30 volts. Conductor sizes range from 50 awg to 2000 kcmil. These requirements also cover appliance wiring materials (AWMs) consisting entirely of fiber optic components or electrical conductors combined with fiber optic components.
These requirements do not include the optical performance of any fiber optic component or group of such components.
These requirements do not include structures that use flat insulated conductors that are not laid in parallel. The requirements for these products can be found in the flexible material interconnect structure standard UL 796F.
This standard does not cover 5Performance evaluation of the semiconducting polymer layer described in 9.
In addition to these structures, this standard establishes guidelines for the evaluation of special structures that do not need to meet all the requirements of the general structure AWM due to their specific end-product use.
The final acceptance of AWM is contingent upon its use in a complete set of equipment that meets the standards applicable to such equipment.
Requirements for Appliance Lead-in Materials (AWM).
UL conducts research and inspection of AWM to determine whether it meets certain voltage and temperature ratings, and meets the needs of its application. There is no specific UL standard for AWM, only a series of UL Bulletins on AWM, and the requirements and test methods applicable to AWM also refer to some other UL standards, which are:
UL 13 Low Power Limit Wire & Cable.
UL 44 rubber insulated wire and cable.
UL 62 cords and mounting wires.
UL 493 Thermoplastic Insulated Underground Feeders and Breakout Cables.
UL 814 Gas Pipeline Marking and Ignition Cables.
UL 1063 Wire and cable for machine tools.
UL 4 armoured cable.
UL 719 non-metallic sheathed cable.
UL 1581 reference standard for wires, cables, and cords.
General guidelines for UL Subject 758 chapters (refer to the AWM file).
UL has more than 100 test programs for AWM for a variety of applications. The basic tests and research items include: structural inspection and combustion tests, as well as tensile strength, elongation, dielectric strength, bending tests and conductor corrosion tests. These tests were conducted on samples that had not been aged and those that had been aged for 7-150 days in a circulating air conditioning chamber. AWM's research projects also include: thermal shock, thermal deformation, cold bending and insulation resistance testing. Some AWM species research projects also involve items that depend on the insulation material and the purpose of the AWM.