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Voltage & Amperage Guide for your CCTV Cameras

Travis Chaffin - Sales Manager - 2M CCTV

Travis Chaffin

Travis Chaffin - Sales Manager – 2M CCTV

877-926-2288 x 6049

If the proper power is not supplied to your CCTV equipment, it can cause it to lose signal or in some cases cause your camera(s) to fry!  Two essential things to consider include Voltage and Amperage (you also want to keep in mind loss of power like Voltage Drop, which can be calculated here).

That said, we wanted to share with you a quick reference guide and overview regarding the voltage and amperage that powers your CCTV security cameras.  Keep in mind, this is a beginner reference guide and does not take into account everything involved with CCTV camera power supply.  Each scenario is different, so to get a full understanding of the specifications you require, please give us a call and one of our knowledgeable representatives can help you – 1-877-926-2288

Most of the below data concerning voltage and amperage can be considered for 99% of systems.  Cameras will usually use either a 24VAC or 12VDC current.

Voltage & Amperage CCTV Guide Infographic -

Basic voltage & amperage reference guide for proper power supply to your CCTV equipment


22 thoughts on “Voltage & Amperage Guide for your CCTV Cameras

  1. I have a question I have 8 cameras they use 12v and 1A amps, could I use a power supply 9 CH Port Power Supply Distribution Box DC 12V 5A for Security CCTV Camera?

    • Depends how much power each camera will utilize. For instance if your cameras use 500ma which is pretty common, a 1.5 amp power supply can run 3 cameras.

  2. HI

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    thiѕ kind of great informative website.

  4. Way cool! Some very valid points! I appreciate
    you writing this write-up plus the rest of the website is also very good.

  5. P=ie or Power = current times voltage For example, a 60 watt light bulb uses 60 watts.
    If it is powered from 120 volt power supply then you can solve for amps used.
    So, 60 watts = current times voltage
    So, 60 watts = current times 120 volts
    So, 60 watts divided by 120 volts = 1/2 amp
    That means 1/2 amp multiplied by 120 volts will calculate to be 60 watts of power.
    Yes, if you try and pull too many amps through a small wire it will heat up and can cause a fire.
    Know your watts that the camera or equipment will use and make sure the wire and power supply is rated to handle the watts (aka load).

  6. I am Using Cat6 cable for cctv Analog> Now more than 70 meters the power has not been supported. I am using 12 V 20 AMps Power supply unit. But it cant support more than 70 meters. Please let me know how to overcome this issue for more than 70 meters. (i.e upto 160 to 180 meters)
    Sundaram G

  7. I have 120 IR Bullet Cameras and 4DVR 32ch I wonder what the size UPS backup system to keep the camera power last for 3 hours

  8. Hi,
    anyone familare with the samsung DVR’s I have some of the soc cameras such as the A101 but, I cannot find the amperage anywhere on the net, on samsung site, or in the manual in the spec sheet. Does anyone know the amperage on the 12 cameras in the plug and play systems from samsung such as the SME-2220n systems?

    I have not used a multi meter in so many years that I have lingering questions to my meter readings (understanding them)

  9. Good day sir

    I want to install 4 cameras on one power cable.

    What kind of cable do I need, and what size psu?

    The camera voltage is 12 volt 700ma each
    The length of the cable 20 metre.

    for the video i use Cat 5 cable
    Thanx Johan

  10. Confused, I need to extended a ip camera the specs are 5v 1.5a I need a power source that will extend it to 5m anyone got any ideas

  11. What if I have 2x 700ma cameras and 1x 4a camera. (These are stated in their manuals.
    One is a Samsung Sco-2120r the other two are adst30s70 (no brand) can I use a 12v with over 5.4a? Which is their combined rating? Also what’s the bet way of joining these to the psu?

  12. I have a CMR823HS-CCTV camera and I’m trying to get the wright power to it,
    Power supply DC 12v, 500ma and some sights say 700ma The wall outlit is next
    to the camera, but the house (run) is 200ft away. When I plug it in, it all most wants to come on. I seen a sight that had the same camera and thay sugested to get a 2000ma power supply. The way that chart looks like. I can go up to 7000ma.. Can you help me I don’t want to fry my cammera it was 119, What do you suggest? And you carry them? Thankyou: John

    • John,

      According to spec sheets I have seen on this unit, it requires 700mA. That means a standard 1000mA power supply should work great. As far as the 200 ft video run, that should not affect the power. I have included a link to one of our power supplies that will work great.


  13. Amperage must be controlled in order to protect the electrical lines from overheating or short-circuiting. This is why electricians use fuses and breakers.

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