CCTV cameras monitor a property or area by recording and capturing images. They can be either wired or wireless, and they are available in a range of resolutions and power options.

They require a digital video recorder (DVR) to store the footage, which is usually included with a complete system. Network video recorders (NVR) and analog recorders are also available for purchase, though they typically cost a bit more.

Video Cables

Cameras are connected to the display devices via a series of video cables. These can be pre-made cables or bulk cable with separate connectors, but the type of CCTV wire you choose depends on your project’s needs.

When it comes to wiring cameras, ethernet cable can be a good choice as it transmits data and power over an internet connection. It’s also a great alternative to coaxial cable when laying large amounts of CCTV wiring.

In most cases, ethernet wire can carry video data over longer distances than coaxial cable without loss of signal. This makes it a great option for long runs of video cable and can help save installation time and money.

In addition, ethernet wiring is able to provide power to security cameras via a Power over Ethernet (PoE) switch. This can be a huge time and cost saver, particularly on systems with multiple cameras.

Power Cables

A power cable connects your CCTV camera and recorder to the power source. This can be a 12V DC supply box or a battery.

The voltage delivered to a camera will decrease over long wire runs due to a process called “voltage drop”. This will cause your cameras to function improperly or may not record at all.

To avoid this issue, run your cables through conduit on the exterior of your structure. This will protect the cables from rain and sun rays.

If you plan on using a PoE (Power over Ethernet) IP camera, you will need to use a special type of adapter that is called a balun. This adapter allows you to connect a network Ethernet cable and a power cable together.

Junction Boxes

Junction boxes are used for a variety of electrical applications. They enclose the spot where wires join together to protect them from the environment and people.

They are also a necessity for electrical code compliance. Any exposed splices are dangerous. They can be tripped over, expelled sparks or even misrepresented as toys by children and animals.

These types of junction boxes come in a variety of shapes and sizes. Most are made of metal but some can be used with non-metallic cables as well.

The National Electrical Code determines a junction box’s size, based on the number and size of conductors it must accommodate. As an example, the code allows 2 cubic inches of space for each 14-AWG conductor.

There are many different types of junction boxes, including gang boxes. These boxes are typically metal and come in 2-gang, 3-gang, and 4-gang varieties.

Cameras

CCTV cameras come in a variety of different types. Some are simple systems that gain their power from a monitor, while others have more complex features, including the ability to record and store data.

They can also be wired or wireless, and may need a cord or battery pack to run. Cameras that are connected to the internet, or IP systems, can be more expensive and require a DVR (digital video recorder) to operate.

Once the DVR is powered on, check that all of the cameras are capturing their intended areas and that their angles account for blind spots. If some are not, then it’s likely that the connections or network clips aren’t working properly.

If you have a system that includes many cameras, you may need to run your wires through the walls or in an attic space. This will give your CCTV system a clean look and make it harder to hack or tamper with.