Multicore Armored Cable

Tensile strength, combustability and monetary value are among the possibilities.

in one website it is told that aluminium avoids interference problem in single core cable as it is non magnetic in nature but why the same is not used for multi core cable.

the reson is ,firstly the steel is having better strength than aluminium.second is the cost implication.

As the name suggests, Armoured means sufficient strength to withstand mechanical impacts as these are meant to be primarily 'buried'. Aluminium is not that strong and ofcourse there is cost factor too.

Dear Sir,

Aluminium armour is used in single core cable as Aluminium is non - magnatic. For Three Core cables and Three and half core cables steel armours are used as they are more strong and serve the purpose of protecting the cable.

Thanks

Tarun

Armoured cables are selected to withstand the environment that the cable is expected to encounter. In the mining industry, many cables are "armoured" since they will have earthmoving equipment moving over them and as such the steel provides the necessary strength (up to a point) where Aluminium would be inferior and more expensive.

The armour is seldom nominated for "shielding" of electronic grade signals and usually multicore/multiphase cables have "balanced" current flow or substantiual magnitude. Thus the magnetic and other related effects are of minimal consequence.

During my indenture at a coal mine had to repair (re-join) an armoured cable. 3 phase plus earth, 1100 strands per phase, plus 6 "conductive rubber" lines for earth leakage. The cable was double layer armoured with 4mm diameter high tensile wires with relevant insulation between each layer. Took over a week to do the soldering and another week to do the outer layers and armour. Not my favourite job!!