Splicing Security Camera Wires In 6 Simple Ways


When it comes to security cameras, the best image quality is achieved by using direct cable runs from the camera to your PVR or display. However, there are instances where you may need to extend the length of the wire. Whether you miscalculated your measurements or relocated the camera or PVR, you’ll need to know how to splice security camera wires. In this article, we’ll provide you with a comprehensive guide to splicing security camera wires using six simple methods.

Method 1: Understanding Cable Types

Security systems can use either analog cameras or digital IP cameras. IP cameras utilize Ethernet connections, which transmit both the camera’s signal and the power required to operate it. On the other hand, analog cameras typically use 3-wire or Siamese cables. These cables consist of a TV-style RG59 cable for the video signal and positive and negative wires for powering the camera. Some Siamese cables even include an audio wire, while 4.1 cables support cameras with built-in motors for tilting and panning.

Method 2: Splicing Pre-Made Cables vs. Bulk Cables

When you’re splicing security camera wires, you have the option to use either pre-made cables or bulk cables. Pre-made cables come with connectors already installed, saving you money on purchasing additional connections and installation equipment. On the other hand, bulk cables are cost-effective and easier to thread through walls and ceilings. However, splicing bulk cables requires a moderate level of experience.

Method 3: Splicing with Couplers

If your cables already have connectors, using a coupler is the simplest method for splicing security camera wires. Ethernet cables with RJ12 plugs can be connected using a coupler with female RJ12 jacks. For Siamese cables with push-and-twist BNC connectors, a cylindrical coupler with lugs on either end can be used. When using couplers, it’s a good idea to tape them up to prevent interference.

Method 4: Manual Ethernet Cable Splicing

Ethernet cables consist of eight color-coded wires twisted together in pairs. To manually splice these cables, strip the outer insulation from each end to expose the wire. You can either solder or crimp the wires onto tiny butt-type connectors. Make sure to tape each wire for added insulation and protection against short circuits. Finally, slip heat-shrink tubing over the splice and heat it to secure the connection.

Method 5: Splicing a 3-Wire Security Camera

Splicing a 3-wire security camera, specifically one that uses an RG59 cable, requires removing the outer insulation of the braided weave shielding and cutting away the inner insulation of the center wire. By soldering or crimping the two center wires together, and twisting and connecting the braided segments, you can create a secure splice. Insulating the splices with tape and heat-shrink tubing is recommended.

Method 6: Splicing a 3.1 or 4.1 Cable

Splicing a camera that requires a 3.1 or 4.1 cable follows a similar process to splicing a 3-wire camera. Match the colors of the extra wires in the cable and connect them accordingly. Keep in mind that the color of the extra wire in a 3.1 cable may vary between brands, but it’s never black or red. If you encounter different wire colors or uncertain power lines, consult a wiring diagram for accurate identification.


In this article, we’ve explored six simple methods for splicing security camera wires. Whether you’re working with Ethernet cables, Siamese cables, or specialized 3.1 or 4.1 cables, these methods will help you extend the length of your wires effectively. Remember to follow the proper steps and ensure the connections are secured and insulated. With these techniques, you’ll be able to customize the length of your security camera wires and achieve optimal placement for your surveillance system. Thank you for reading, and we hope you found this guide helpful.

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