Mining Power Feeder Cable

The Type 241 1.1/1.1kV 3x95mm² underground mining trailing cable has a continuous ampacity rating of approximately 265 amperes per conductor when operating under the following standard reference conditions: an ambient (air or soil) temperature of 40°C, a maximum conductor temperature of 90°C, and typical installation methods for buried or bundled trailing cables in underground mining environments. This 265-ampere rating represents the maximum continuous current that each individual power conductor (the three 95mm² cores) can safely carry indefinitely without exceeding the insulation’s thermal limits or compromising the cable’s mechanical and electrical integrity. However, and this distinction is critically important, the 265A figure applies only when the cable operates under these precise reference conditions—when ambient temperature rises, when multiple cables are bundled together, or when installation methods change, the safe operating current must be reduced through the application of specific derating factors that reflect the real-world thermal environment.