A customer needs sixteen PoE cameras to cover the premises.

"PoE class 3 delivers up to 15.4 W per port (PSE), with 12.95 W available to the device (PD).

16 × 15.4 W = 246.4 W, but only 16 × 12.95 W = 207.2 W is actually drawn by the devices.

As the total available switch power is 240 W, it can handle 16 PoE class 3 cameras (assuming the draw is calculated at PD consumption)."

— Axis Power over Ethernet Guide

"Class 5 (40 W per camera) and mixed Class 4/Class 5 configurations would exceed the 240 W total switch budget."

— Axis Communications Academy, Network Video Fundamentals, 2022