Considerations for cameras when electricity is cut off

We are in the process of installing indoor/outdoor cams.  However, a question came up; what happens if the electricity is cut off or when there is a power outage.  

Is having a UPS is sufficient?
If so, what type of UPS?
What other considerations should we take into account with this issue of maintaining power when loss?
rayluvsAsked:
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masnrockCommented:
What type of cameras are they? IP or CCTV? A UPS would be quite helpful. However, this should be planned as a far of your overall backup power plan. Think of the critical portions of your infrastructure.
ecarboneCommented:
If your surveillance cameras run on PoE, then you only need to make sure power is maintained to the server and the switches where your cameras are plugged in. As with any UPS, the runtime on battery depends on the size of the UPS you buy (longer runtime = higher cost) and the load on the device itself.

APC and TrippLite both have online calculators that can help you decide which unit to purchase. You enter in the load values (based on your switches, cameras and server) and the calculator will show you a chart that shows how long the battery backup will run without power.

I suppose another option for power would be a standby generator.

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rayluvsAuthor Commented:
The cams at wired and wireless (2 types).

PoE cams get their electricity from lan cable?

How do I know the cams we have are PoE?
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ecarboneCommented:
If it's a wireless camera then it must be getting its power from a dedicated power connection.

PoE = Power Over Ethernet.
A standard network switch does NOT provide power through its ports, so you'd have to use a PoE switch OR use a separate device called a PoE injector. It sits inline between the network switch and the camera. But PoE injectors are messy, meaning now you're using twice as many Ethernet cables, plus each PoE injector has its own power supply that now needs to be plugged in somewhere, and it's just one more thing to have to maintain.

In any case if your cameras are NOT PoE then there's no point having a PoE switch or injector. If your camera does not support Power Over Ethernet then that means the camera has 2 cables attached to it - one for the signal and one for power.

Also keep in mind there are cameras that do NOT work over Ethernet. These types of cameras might use coax or some other type of cable to carry the video signal.

So my previous comment is ONLY relevant if your cameras are PoE devices. They best way to check is to look up the model number on the manufacturer's website, or if you see an Ethernet port on the camera then it might also indicate it is PoE.

If your camera does NOT have an Ethernet port and instead has some other type of cable to carry the video signal, then it's not a network camera and it's not PoE.
masnrockCommented:
PoE cams get their electricity from lan cable?
Sort of. The LAN cable is the mechanism through which power is received. The actual power source is what you have to worry about in that case. But you need to check whether you're using a POE switch or injectors. Either way, the switches the cameras are connected to become important. (If injectors are in use, those should be part of your backup power plan)

How do I know the cams we have are PoE?
The presence (and use) of an ethernet port.
rayluvsAuthor Commented:
Thank you guys a lot!
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