Which PoE Switch Do I Need for My Security Cameras?
A reliable camera system starts with the right network infrastructure. If you work with IP cameras, a PoE switch (Power over Ethernet) is usually an essential part of the installation. A PoE switch for security cameras carries both power and data over a single network cable, which makes the installation simpler, tidier and more reliable.
But which PoE switch do you actually need for your security cameras? In this guide we explain what to look for and how to make the right choice.
What is a PoE switch?
A PoE switch is a network switch that powers connected devices over the Ethernet cable. This means IP cameras don't need a separate power adapter.
Advantages of a PoE switch:
- Just one cable per camera
- Less installation work
- Neater cabling
- Easy to expand
- Centralised power supply
- Option for backup power via a UPS
In professional video surveillance, PoE is now used almost without exception.
Why use a PoE switch for security cameras?
A PoE switch for security cameras gives you more flexibility than individual power supplies.
Cameras can easily be mounted on or in:
- Building facades
- Warehouses
- Car parks
- Industrial halls
- Offices
- Retail premises
Even locations without a power socket are easy to cover, as long as you can run a network cable there.
Management also becomes easier, because all cameras are powered centrally from a single switch.
Which PoE standard do I need?
Not every security camera draws the same amount of power. That's why there are several PoE standards.
PoE (IEEE 802.3af)
- Up to 15.4 W per port
- Approx. 12.95 W available to the camera
Suitable for:
- Standard IP cameras
- Dome cameras
- Turret cameras
- Basic indoor cameras
PoE+ (IEEE 802.3at)
- Up to 30 W per port
Suitable for:
- Cameras with infrared (IR) illumination
- PTZ cameras with limited power consumption
- Cameras with a built-in speaker
- Intercom systems
For most modern security cameras, PoE+ is the best choice.
PoE++ (IEEE 802.3bt)
- 60 to 90 W per port
Suitable for:
- High-power PTZ cameras
- Multi-sensor cameras
- Advanced video intercoms
- Equipment with high power consumption
How many cameras do you want to connect?
The number of cameras determines how many ports you need.
PoE switch for 4 cameras
A 4-port PoE switch is suitable for:
- Homes
- Small offices
- Practices and treatment rooms
PoE switch for 8 cameras
An 8-port PoE switch is ideal for:
- Shops
- Restaurants, bars and cafés
- Small commercial buildings
This is one of the best-selling sizes.
PoE switch for 16 or more cameras
For larger installations, choose:
- 16-port PoE switch
- 24-port PoE switch
- 48-port PoE switch
Suitable for:
- Warehouses
- Industrial halls
- Schools
- Business parks
Always allow for future expansion.
How do you calculate the PoE budget you need?
The PoE budget is the total amount of power a switch can deliver across all its ports.
Example
You have:
- 6 IP cameras
- Power consumption per camera: 8 W
Calculation:
6 × 8 W = 48 W
Then add at least 20% headroom:
48 W + 20% = 58 W
In this example, you choose a switch with a PoE budget of at least 60 W.
For commercial installations, it's wise to build in extra margin for future expansion.
Managed or unmanaged PoE switch?
Unmanaged PoE switch
An unmanaged PoE switch works straight out of the box.
Advantages:
- Simple
- Affordable
- No configuration required
Suitable for:
- Homes
- Small installations
Managed PoE switch
A managed switch offers advanced networking features.
Advantages:
- VLAN support
- Bandwidth management
- Monitoring
- Remote management
- Additional security
For businesses and larger camera systems, a managed PoE switch is usually the best choice.
Which PoE switch for Hikvision, Dahua and Uniview cameras?
Many customers ask which PoE switch is suitable for brands such as:
The good news: virtually all modern IP cameras from these brands work with standard IEEE 802.3af or 802.3at PoE.
Always check:
- Maximum power consumption
- Number of cameras
- Total power required
That way you avoid overloading the switch.
Common mistakes when choosing a PoE switch
Not enough PoE budget
A common mistake is to look only at the number of ports.
The total power budget is at least as important.
Not planning for expansion
Installing 6 cameras today?
Then an 8-port switch may be enough, but a 16-port model gives you more room to grow.
Not using a managed switch
On business networks, a managed switch can provide extra security and control.
Not using a UPS
Without a UPS, a power cut will often take the camera system down immediately.
PoE switch FAQ
Which PoE switch do I need for 8 cameras?
For 8 security cameras, an 8-port PoE+ switch with a PoE budget of at least 100 W is generally recommended.
Do all security cameras support PoE?
No. Only cameras that support PoE can be powered over the network cable.
Which is better: PoE or PoE+?
For modern security cameras, PoE+ is often the safest choice because of the higher power available.
Can I connect an NVR to a PoE switch?
Yes. In many professional installations, all cameras are connected to a PoE switch, which in turn is connected to the NVR.
Conclusion
Choosing the right PoE switch for security cameras depends on the number of cameras, the power required and the network features you need.
For small installations, a simple PoE switch is often enough. For commercial applications, managed PoE switches with sufficient PoE budget and room for expansion are usually the best choice.
Not sure which PoE switch suits your camera system? UMATECH is happy to give you personal advice and a solution that fits your situation, today and in the future.
