Will this work for PoE applications?

Here's Google's contradictory response: No, the Utilitech Model #RJ456AC50FT-BLK is just a standard Ethernet cable (likely Cat5e or Cat6, given the style), not a PoE injector, splitter, or switch; while a cable itself doesn't provide PoE power, it needs to be a quality cable (Cat5e/Cat6/Cat6a) to carry PoE from a PoE-enabled switch or injector, which this cable isn't. The model number suggests it's a 50-foot, black, Cat 5/6 Ethernet cable, meaning it can work with PoE devices if connected to a proper power source, but it won't supply the power itself.