Siamese cable RG59 with power is a kind of combination cables, and one part is coaxial cable, the other is usually two power cables.
Contruction of coaxial cable RG59:
Inner conductor: 0.81mm CCS or BC
Insulation(Dielectric): Foamed PE or Solid PE
First Shield: Al Foil
Second Shield: Al or CCA wire braiding
Jacket: white or black PVC
Power cable:
Inner conductor: CCAM or BC
Sectional area of conductor: 0.75 or 0.5 sqmm
Insulation: PE or PVC
The type cable is mainly used in CCTV system to transit vedio signals.