CCTV Camera Wiring Color Code

CCTV Camera Wiring Color Code

Most CCTV systems employ coax cable for video transmission and multiple power wires to power the camera, although for ease of installation, some installers use pre-made cables that already feature video and power connectors attached.

Plug-and-play cables can save prep time, but are more costly than bulk cables that must be cut to measure. Ethernet wire can run long distances without signal degradation.


Security cameras rely on electricity to transmit data from a central hub, using wires with different colors indicating their specific functions. Most often there are five wires: yellow for video transmission; two red ones for power; and one black ground wire that is all insulated to maintain maximum protection against signal interference.

CCTV Camera Wiring Color Code

First, you need to connect the power wires. This can be accomplished using either an RG59 siamese cable with BNC twist-on connectors on both ends or Cat5e Ethernet cables running between your DVR and each camera – in which case attach a 2.1mm DC male plug with screw terminal block to each 18/2 copper wire and attaching an 18/2 cable from this line that supplies 12-volts from your multiple output power supply box (usually nearby your DVR) directly into each camera.

Pre-fabricated Ethernet cables with end connectors attached are often called plug-and-play cables and can make your job much simpler, however, these are expensive and only come in set lengths. You could purchase bulk cable on a roll instead and cut it to meet your requirements.

As soon as you receive an RJ45 plug, you must first identify its pins. Each wire has a specific color corresponding to its purpose; writing down each color’s PIN before beginning any work on them can help eliminate confusion later on. Once identified, these pins should match with those found on CCTV cameras to avoid mismatches in wiring schemes and prevent further complications.

CCTV Camera Wiring Color Code

Once this step is completed, it’s time to tackle the splicing. For this task, you will require a wire stripper and needle-nose pliers; make sure you maintain a steady hand when handling wires so they remain apart; use needle-nose pliers to cut each wire to the appropriate length before using needle-nose pliers to cut. When cutting, twist each pair to prevent interference between wires if touching; twist them together as soon as they do; finally, crimp every connection before using needle-nose pliers to cut and cut wires at their junction.


CCTV (cable television monitoring) systems provide a cost-effective means of safeguarding a home or business. Cameras capture images that are transmitted wirelessly (depending on system type) to a monitor and recorder to be monitored by security personnel or stored for later review.

CCTV monitoring systems are widely employed by businesses and public spaces to detect theft, vandalism, and other crimes. Depending on the system chosen, cameras may be scaled up or down depending on the required surveillance area; usually, one monitor displays footage from all cameras at once in either a control room or each camera location.

A CCTV system uses different colored wires to indicate their function: one yellow wire transmits video data while two black power wires supply electricity for running cameras; finally, there is also the grounding wire which connects all components.

A typical CCTV system will use RG59 Siamese cable. This heavily shielded cable combines an RG59 coax cable for video data with two 18 gauge 2 conductor power wires in one jacket – making it more durable than pre-made camera cables and cuts to meet individual installer specifications.

This cable can also be fitted with a BNC to RCA connector to fit directly into a DVR or monitor’s CCTV camera input, making it more cost-effective for smaller projects.

Other types of cables can also be used, but it is generally advised to use RG59 in most applications. It comes as either pre-made cable with end connectors and various length options or on a spool which allows installers to cut it to size themselves.

Ethernet provides an alternative unaffected by internet outages or network problems, thus making it ideal for those who do not wish to rely on WiFi connections and require secure, fast, stable connections.


An analog system requires using a standard coaxial cable consisting of one pair of video transmission wires and another set for a 12-volt power supply. However, most CCTV professionals opt for running one length of CAT5e cable from their DVR recorder directly to each camera; this will take care of both duties without the additional work involved with running separate coax cables or multiple cables separately.

The yellow wire on your camera’s positive power cable (also referred to as red video transmission wire or positive power wire) should be connected to a DC 12 V power supply with an RCA plug and connected directly to its positive terminal.

Dependent upon the system you own, your next wire may either be blue or green. Blue pairs serve to carry audio signals from the microphone to the camera and should be twisted tightly to minimize interference and noise; green pair serve to transmit video signals between the camera and DVR while being twisted tightly to minimize signal loss or noise ingestion.

IP systems will still send analog signals to a DVR. Still, these will be converted to digital by each camera before being distributed via Ethernet wires – making for much quicker and more reliable connections than WiFi connectivity.

When purchasing wires for your CCTV installation, there are two primary choices. Pre-made cables with color-coded connectors or bulk cable on a roll may be more costly but save time by eliminating preparation work such as cutting and measuring cables – though their fixed length may not suit every installation scenario.

Sometimes it can be easier to repurpose existing cable wiring in your home or business than starting from scratch. In this instance, write down which pin# corresponds with each wire in order to match it up with new connections and make any necessary splices in existing wires; but in all instances, a professional electrician should always be consulted prior to undertaking major work projects on any major rewiring efforts.

Data or Control

The white wire on a CCTV cable does not transfer data directly but instead powers a video signal modulator box that converts video from security cameras into another frequency that TV sets can pick up to monitor their images. Furthermore, this allows long-distance transmission without degradation to the quality of signal transmission.

Some prefer having this emergency box located outside their house for easy access in an emergency, while others find it more suitable to store it within their garage or attic.

Once your video signal modulator box has been set up, you must run an RG59 Siamese cable from it to each CCTV camera. This cable combines coax cable for video signals as well as 18 gauge 2-conductor power wires, making it simple for you to link cameras and their signal modulators through just one cable run.

Once your cable has been laid, be sure to bury and insulate it properly so no one can cut or pull it out. At least six inches should be dug below ground, with protective jacketing for weather protection; its wires should also be insulated to avoid shorting or overheating.

Label the ends of each wire for easy identification and to help reorganize them if necessary. Furthermore, thicker wires intended to protect security cameras should also be considered to avoid potential damage to them.

Though installing a CCTV system may be simple, consulting with an expert for peace of mind and professional results is wise. They will ensure all cables are correctly labeled and not overloaded so that your system yields optimal performance results.

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