Confirmed by designation
• Type: RG59 20AWG BC + 18AWG x 2C BC PVC
• RG59 Conductor / Insulation: BC (0.81 mm), Foam PE (3.66 mm)
• 18AWG x 2C Conductor / Insulation: BC (12 x 0.38 mm), PVC (1.75 mm)
• Shielding / Braid: CCA, 95% coverage
• Jacket: Black PVC
• Characteristic Impedance: 75 +/- 3 Ohm
• Operational Temperature: -20C to 75C
1. Product Overview
The RG59 Siamese Cable with 18AWG 2C Power (20AWG BC Coax) combines a 75-ohm RG59 coaxial cable and a 2-core 18AWG power cable in one parallel-bonded structure. The coaxial section uses a 20AWG bare copper conductor for stable video signal transmission, while the integrated 18AWG 2-core power cable provides a convenient solution for powering compatible surveillance equipment.
By combining video and power cables into a single cable assembly, this Siamese cable helps simplify cable routing and installation while keeping the wiring system neat and organized. It is suitable for CCTV, surveillance, and other video transmission applications where both signal and power connections are required.
2. Product Features
• Siamese Cable Design: Combines RG59 coaxial cable and 18AWG 2-core power cable in one integrated structure, simplifying installation and cable management.
• 20AWG Bare Copper Coaxial Conductor: Provides good electrical conductivity and reliable video signal transmission for surveillance applications.
• 75-Ohm RG59 Construction: Designed for standard coaxial video transmission in compatible CCTV and surveillance systems.
• 18AWG 2-Core Power Cable: Provides a dedicated power path for compatible cameras and other low-voltage equipment.
• Integrated PVC Jacket: The outer PVC jacket protects the internal conductors and provides practical durability for indoor and suitable protected installation environments.
• Efficient Installation: The combined video-and-power construction reduces the need to install separate cables, helping save installation space and labor.
3. Product Applications
• CCTV Surveillance Systems: Suitable for compatible analog and HD surveillance camera installations.
• Security Monitoring: Used in residential, commercial, and industrial security systems where video and power need to be routed together.
• Camera Installation: Suitable for installations requiring both RG59 video transmission and a separate 2-core power connection.
• Indoor and Protected Outdoor Applications: Can be routed through ceilings, walls, cable trays, and conduits according to the applicable installation requirements.
4. Why Choose 20AWG Bare Copper Coaxial Cable?
The 20AWG bare copper conductor in the RG59 coaxial section offers good conductivity and reliable signal transmission. Compared with clad conductors, bare copper provides a consistent conductive path and is also easy to process during stripping and termination.
For surveillance installations, conductor material can affect signal stability, cable flexibility, and long-term connection reliability. The combination of a 20AWG bare copper coaxial conductor with an integrated 18AWG 2-core power cable provides a practical balance between video transmission and power delivery.
The Siamese construction also offers an installation advantage: installers can route video and power together instead of managing two completely separate cable runs. This makes the cable particularly convenient for CCTV projects where clean routing and efficient installation are important.

Technical parameter
| Type | RG59 20AWG BC+18AWG×2C BC PVC | |
| (mm) Specification | ||
| Specification | RG59 | 2C |
| Conductor | ||
| Conductor material | BC | BC |
| ConductorConstruction(mm) | 0.81±0.01 | 12×0.38±0.01 |
| Insulation | ||
| Insulation material | Foam PE | PVC |
| Insulation diameter (mm) | 3.66±0.1 | 1.75±0.1 |
| Average Thickness (mm) | 1.43 | 0.31 |
| Braid | ||
| Braid material | CCA | / |
| Braid coverage | 95% | / |
| Jacket | ||
| Jacket material | PVC | PVC |
| Jacket Diameter(mm) | 6.1±0.3 | 4.5±0.2 |
| Average Thickness(mm) | 0.95 | 0.5 |
| Color | Black | |
Detailed technical parameters
| Type | RG59 20AWG BC+18AWG×2C BC PVC | |
| (mm)Specification | ||
| Electrical&Physical Characteristic: | ||
| Conductor DCR 20℃ | ≤34 Ω/km | |
| Characteristic Impedance(Ohm) | 75±3 | |
| Capacitance Conductor to Shield(pF/M) | 53±3 | |
| Operational Temperature Range | -20℃~75℃ | |
| Frequency (Mhz) | Attenuation≤dB/100M | Return Loss≥dB |
| 10 | 0.95 | 20 |
| 71.5 | 2.8 | 20 |
| 135 | 3.9 | 20 |
| 270 | 5.52 | 20 |
| 360 | 6.4 | 20 |
| 720 | 9.4 | 20 |
| 1000 | 11.8 | 20 |