These low voltage cables are applied for common indoor installation but not underground.

Conductor or stranded annealed copper conductor

Extruded colored PVC, capable for the operating continuously maximum temperature of the cable

Inner Sheath
Extruded black PVC filler

Outer Sheath
Extruded white PVC suitable for the operating temperature of the cable

Identification of cores
Complying with system O/I (other colors on request)
Specification: SPLN 42-2:1992, SNI 04-2699-1999