List device demand
Use the maximum expected draw for each camera, access point, intercom or controller—especially devices with heaters, infrared or motors.
Check the switch limit
Confirm total PoE budget, per-port limits and how the budget changes with redundant or multiple power supplies.
Keep headroom
Design margin helps with startup peaks, later additions and real-world differences instead of running the switch at its absolute limit.
Project checklist
- Record device model and maximum watts
- Check uplink and data capacity as well as power
- Verify live PoE readings during commissioning
Practical takeaways
- Define the operating requirement before choosing products
- Document interfaces, failure behaviour and ownership
- Test the completed system and keep records for support
