Yes, a CCTV cable can indeed be joined, especially when a longer length is required.
Extending CCTV Cable Runs
Often, when installing CCTV systems, the pre-made cable lengths aren't sufficient for the distance between the camera and the recording equipment or power source. Instead of running a single, potentially very long custom cable, joining existing cables is a common and practical solution.
Joining allows installers to combine shorter cable segments to achieve the necessary length, saving time and potentially reducing waste.
How CCTV Cables Are Joined
Joining CCTV cables typically involves using specific connectors and, for protection, often a suitable enclosure or kit.
According to the provided information:
This simple kit allows our combined video and power cables to be joined together where longer cable runs are required.
This indicates that purpose-built kits are available specifically for joining these types of cables. These kits often include the necessary connectors and a protective housing.
Types of Cables That Can Be Joined
The reference specifically mentions joining "combined video and power cables." These are common in CCTV installations as they simplify wiring by carrying both signals within a single jacket.
- Combined Video and Power Cables: These all-in-one cables (like Siamese coax or pre-made plug-and-play cables) can be extended.
- Separate Video and Power Cables: Coaxial cables (for video) and separate power cables can also be extended using appropriate connectors and methods.
Using Joining Kits
Joining kits are designed to provide a secure and often weatherproof connection.
- External Use: The reference notes the kit is "designed for external applications," highlighting the need for weatherproof seals to protect the connection from moisture and environmental factors.
- Internal Use: While primarily for external use, these kits "can be used internally should you wish to box the connection to lessen the chance of tampering." Boxing the connection internally adds an extra layer of security and neatness.
Considerations When Joining CCTV Cables
While joining is possible, there are a few points to keep in mind:
- Signal Loss: Every connection point can introduce a small amount of signal loss (attenuation) for both video and power. While usually negligible for one or two joins over moderate distances, excessive joins or poor connections can degrade video quality or power delivery.
- Connection Quality: Using the correct connectors and ensuring they are properly terminated is crucial for a reliable signal. Loose or poorly made connections are a common source of problems.
- Environmental Protection: If the join is outdoors or in a damp environment, using a properly sealed, weatherproof enclosure (like those in a dedicated joining kit) is essential to prevent corrosion and damage.
- Cable Type: Ensure the joining method and connectors are compatible with the specific type of CCTV cable being used (e.g., BNC connectors for coax video, DC barrel connectors for power, or specific connectors for plug-and-play cables).
By using appropriate joining methods, such as dedicated kits, CCTV cables can be effectively extended for longer runs.
