Different Types of Power Supplies for Your Security Cameras

Sep 20th 2018

Different Types of Power Supplies for Your Security Cameras


This video demonstrates the different options you have when powering your CCTV cameras and how to connect or wire them up.


Welcome to another ApexCCTV training module. This is Matthew and Jason, and today we’re going to demonstrate how to power your security cameras with individual CCTV power supplies and multi-channel power distribution units. We will be working with precut Siamese cable as well as non-precut Siamese cable that we have terminated ourselves. These cables come in various lengths and are used to transfer your video from the camera to a DVR and power from a power supply or unit to the camera.

The conventional way to power single cameras is to use individual power supplies. This item is usually just a transformer with an already terminated connection. You can connect this to the end of the Siamese cable near your DVR or at the camera itself. Using this method is great for individual cameras or locations where power is rarely accessible near the camera.

If you have a multiple camera installation, however, you may want to centralize your power distribution by using something like this 4-channel 12V DC power distribution unit. First, wire the AC wall plug to the unit by connecting the black and white leads to the two black leads coming from the transformer inside the PDU (power distribution unit). Then, connect the multicolored lead to the multicolored ground lead connected to the case. If you are using precut Siamese cable, the first step is to install the female connector pigtails into the unit.

It is important to not cross polarities - that may result in a damaged camera or power distribution unit, or both. Typically, but not always, the white striped wire is the positive cable. This cable is sometimes red also. In this scenario, the red cable with the black stripe is the negative cable and the positive cable is red with small white plus signs. Check the documentation provided with your equipment to verify this before installing your system.

Connect the bare wire of the positive cable into the positive terminal of the PDU, and the bare wire of the negative cable into the negative terminal. Secure the connector by tightening the terminal screws. Next, connect the precut cable to the camera. Then, connect the other end of the precut cable to the pigtail and the video input of your DVR. The camera is now powered and ready to be used.

Now, if you’re using the non-precut cable, you can connect the bare ends of your desired length of cable directly into the power distribution unit. Just connect the positive wire to the positive terminal and the negative wire to the negative terminal, as before. With this particular setup, however, you will need to put a female connector on the other end of the non-precut Siamese cable so that you can connect your camera. Remember to wrap the cables to your liking during installation. This can be done using the various removable sections of the unit. That covers the different options you have for powering your CCTV cameras.

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