15kV is a voltage commonly specified for equipment cables, including robust Mining equipment cables, manufactured in accordance with IEC 60502-2, but is also associated with British standard armoured cables. Whilst mining cables may be sheathed in a robust Rubber to provide abrasion resistance, especially for trailing applications, the BS6622 and BS7835 standard cables are instead sheathed in PVC or LSZH materials, with mechanical protection provided from a layer of steel wire armouring. Cables named using Portuguese references are also available both armoured (STA/ATA and AWA/SWA) and unarmoured variants, with PVC or PE sheathing.

As a British standard voltage, 8.7/15kV isn't as commonly specified as 11kV or 33kV, but will depend on the application demands. IEC 60502-2 specified cables can include additional elements including fibre optics, anti-torsion braids can be included in the construction, and sheathing materials suitable for submersion also specified.

All Medium voltage cables, 15kV included, will include a Copper wire screen and/or a layer or copper tape for equalising purposes. This is regardless of whether they have armour or not. These screens provide a route to earth in the event of a fault current or insulation failure, taking a substantial proportion of the total fault current and providing a return path for the cable neutral. Where it has been earthed at both ends of the cable is can also provide EMC electromagnetic protection.

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