UL758 Cables & Wires
Underwriters Laboratories’ standard UL 758 covers Appliance Wiring Material (AWM).
It sets out the specifications for single and multi-core insulated conductors for cables and wires used within factory and production equipment, including for connecting appliances. The cables covered by this standard have a minimum operating temperature from 60oC and have conductors, gauged in the US sizing system, ranging from 50AWG to 2000kcmill. Fibre optic cables are also covered under this standard, however their performance criteria are covered separately.
UL 758 Cables & Wires PropertiesUL758 cables and wires have a minimum voltage rating of 30V up to 1000kV AC and from 3kV DC power upwards, which encapsulates low voltage, medium voltage and high voltage cables. It also covers cables with copper and aluminium conductors (as well as alternative fillings like fibre and nickel). Appliance wires can be insulated and sheathed in polymers and thermoset materials including PVC (Polyvinyl Chloride), Neoprene, LLDPE, MDPE or HDPE (Linear low-density, medium-density or high-density Polyethylene), PTFE (Polytetrafluoroethylene), PP (Polypropylene) and TPU (Thermoplastic Polyurethane). These cables and wires can be shielded with metallic braid or tapes to offer mechanical protection.
Cables that are designed for use internally in factory equipment only have to be insulated. Having a protective outersheath is not a mandatory requirement of UL758 standard, however where the cables are used externally to connect equipment they must be sheathed. The insulation and sheathing material will determine the extent to which the cable is resistant to oils and greases, UV light, and moisture ingress.
Appliance Cables & Wires
UL758 Cables & Wires
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