Leaky Feeder Cable
Most mining operations that have communication systems, utilise numerous cable types and impedances to best maintain the objectives of the communication network.
Common types of communication cables are:
Trilogy RMC2 cable is a low loss 75 Ohm Radiating cable, this cable may be used for shaft communications. This cable is not very flexible and should never be bent at a radius less than 1 metre diameter. This cable is identified as black PVC coated «" embossed with Trilogy RMC2-500-BJ.
Trilogy MC2 cable is a low loss 75 Ohm Standard cable. This cable may be used for areas, such as bore holes, which do not require communication. This cable like RMC2 is not very flexible and the minimum radius should be observed. This cable is identified as black PVC coated «" embossed with Trilogy MC2-500-BJ.
MST Leaky Coax radiating cable is the most commonly used radiating cable in many leaky feeder systems. This cable is a foam dielectric cable. It has an outer yellow sheath and an inner black PVC sheath. This cable is extremely robust and can be identified by its yellow appearance and embossed with MST Leaky Feeder Cable. This yellow outer can be replaced by a blue outer sheath to distinguish it from Mains Firing Lines that can be yellow and appear very similar. Mains Firing Lines are usually embossed with a red stripe down one side of the yellow outer sheath.
Andrews RXL-5 is a high quality 50 Ohm radiating cable, for this reason it should be installed utilising PVC piping for added protection. The active devices are connected to the cables utilising Andrews "N" Type male connectors. All joins in the cable must be made utilising the correct splice kit for 7/8" Radiax (RXL-5). To recognise this cable it will be black or brown in colour, 7/8" in diameter and should never be bent at a radius less than 1 metre diameter. This cable is not recommended as it is expensive and hard to work with.