Wire & Cable Glossary (from C-D)
WIRE CABLE GLASSORY (A to B)
Fire Resistant Cable Testing Standard－IEC 60331 VS BS6387
A:In the United States, smaller conductors are measured using the American Wire Gauge (AWG). With the gauge system, the higher the number is, the smaller the cable will be. For larger wires, circular mils are used. MCM sizes, also called kcmils (kilo-circular mils), are for even larger cables. One MCM is equivalent to one thousand circular mils.
A:UL stands for “Underwriter‘s Laboratory” and is an independent US testing organisation, similar to the German VDE. Based on the the National Electrical Code (NEC, also referred to as NFPA 79) – the safety standard prevalent in the USA for electrical installations – the Underwriter’s Laboratory defines standards for electrical components and their fields of application. UL approvals are also recognised as safety standards in many other countries due to the strict fire protection requirements found in the NEC.