A power supply is a device that supplies electric power to an electrical load. The term is most commonly applied to electric power converters that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy (mechanical, chemical, solar) to electrical energy. A regulated power supply is one that controls the output voltage or current to a specific value; the controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply's energy source.
A CCTV power supply box, also known as a power distribution box, allows surveillance system installers to easily manage the power to multiple CCTV cameras at a central point (usually at the location of the DVR). This allows your camera installation to be neater. For example, instead of having 8 power supply plugs, plug into power strip/electric surge protector, all of your camera power wires can neatly be run to a power supply box. A power supply box is normally installed near your DVR. Our power supply boxes are very simple to install. Each cameras power cable simply screws into the power supply box. The power supply box plugs into a standard power outlet. No electrician is required for installation of the box.