Active Member
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[China]
Address: No.556 Shangpan Road, Lin'an District, Hangzhou City, Zhejiang Province, China
Contact name:Thomas
Hangzhou Aite Cable co.,Ltd. |
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Siamese Cables are usually those that have certain power wires attached to them. While they are considered to be quite complicated to handle, it does, however, provide transmission of both data and power at the same time to security cameras. A combination of two cables, it is made up of RG59 Coax and 2cores of 18AWG Power cable, the former for video transmission quality and the latter for power purposes. In other words, since RG59 is a coaxial cable, it helps in running the video to the security camera, whereas 18AWG/ 2C cable helps in the 24V AC/ 12V DC power to the camera.
This particular cable is made for higher bandwidth, made of copper and aluminum, and for higher frequency. Therefore, it isn’t ideal for indoor CCTVs. It’s a lot heavier than its other types, thus perfect for CCTVs used by city authorities, administrations, police authorities.
Similar to RG-6, the RG-59 refers to ‘Radio Guide’ while 59 refers to the diameter size, i.e., .059 and uses a copper plate. This type of cable is recommended for a lower bandwidth, therefore, it’s ideal for CCTV installations particularly suitable for flats, apartments, societies, hotels and other interior, relatively smaller places. Hangzhou Aite RG59 coaxial cable is a foaming-based dielectric system. With a super gas injected from the foam insulation, the cable thus helps in providing a better quality signal which eventually helps for better surveillance.
What is the max distance that installers can run CCTV cable for video and power?
Here is a question that I received from a customer recently.
Hi thomas, can you please assist. Is it possible to run power cable together with the video on RG59 Cable for a distance of 250 meters. I am a new CCTV technician who has just faced a challenge on an old installation which is not working properly.
Here is the information that I provided.
Analog CCTV camera video transmission is limited to 213 meters or 700 feet using RG59 coaxial cable, unless you use a video amplifier like this one
Using this amp, you can run CCTV video up to 1000 meters / 3000 feet with RG59.
The max distance that you can run power cable to the camera without voltage drop depends on the voltage, amount of power the camera draws in amps, and the gauge of the cable that you are using. You can use this voltage drop calculator and voltage drop chart.
Spec: 0.81mm CCS+3.7mm FPE+AL Foil Gold Color+128#x0.12mm CCA+6.0mm PVC Black + 2C*(24*0.2CCA+1.8PVC)+9.0PVC White
Packing: 100m Coil, 300m Reel, 500m/Wooden Drum, Common
| Construction | Material | Diameter(mm) |
| Inner Conductor | BC/ CCS | 0.81/ 20AWG |
| Dielectric | Foam/ Solid PE | 3.7 |
| First Shield | AL Foil(White or Gold Color) | 18 |
| Second Shield | CCA/ AL Braid | 60-95% |
| Outer Jacket | PVC | 6.0; 9.0 |
| Power Wire | CCA | 7*0.37 |
| PE/ PVC Twisted or Parallel | 1.8 |
Electrical Characteristics
| Impedance (Ω) | 75±3 |
| Capacitance (pF/m) | 52±2 |
| Velocity of Propagation(﹪) | 85.0 |
| Return Loss 5-1000MHz(dB) | ≥22 |
| Return Loss 1000-3000MHz(dB) | ≥20 |
Attenuation(@20℃)
| Frequency (MHZ) | Min Attenuation (dB/100ft) | Max Attenuation (dB/100m) |
| 5 | 0.6 | 1.9 |
| 55 | 1.6 | 5.2 |
| 187 | 2.8 | 9.3 |
| 211 | 3.0 | 10.0 |
| 400 | 4.1 | 13.5 |
| 500 | 4.6 | 15.0 |
| 750 | 5.6 | 18.5 |
| 860 | 6.1 | 20.0 |
| 1000 | 6.6 | 21.5 |
| 1500 | 8.2 | 26.8 |
| 1800 | 8.8 | 28.9 |
| 2200 | 9.8 | 32.2 |
| 3000 | 11.5 | 37.6 |
