The flame-retardant nature of the cable in the case of multiple dense configurations should be by the “burning test method for bundled wires and cables”. As well as the cable configuration, the need to prevent catastrophic accidents and economic and reasonable principles, to meet the requirements of the appropriate category.
lszh cable
The New Trend Of Zero Halogen Flame Retardant Electric Cable Industry

Electric cables are mainly used to transmit electricity. It consists of one or more mutually insulated conductors. At present, most of the insulation in the electrical power system is made of PVC, XLPE, and LSZH materials.