How do I calculate the UPS (Uninterruptable Power Supply) requirements for a NVT Phybridge PoLRE24/48 (NV-PL-024/NV-PL-048) switch?

To determine more accurate UPS power requirements, you simply add up the power consumption of the switch, adapter, IP endpoint, and the power lost to the cabling as line loss. 

As a general formula. 

Power draw = Switch power consumption + line loss + adapter power consumption + endpoint power consumption.

Example: 

Switch power consumption: 17W

Each Phylink Adapter: Approx 1W 

Line Loss: You can calculate this using our PoE Distance calculator available on our website.  

Once you have the final value, include a 10% buffer and that should be the value used as the wall power draw in order to spec out a UPS.