If not well prepared, passive PoE switches may burn out the terminal devices. Also, the power modes of PSE and PD are other factors that may cause PoE faults. What adverse events can occur when a PoE port short-circuit occurs? A short circuit can happen in a PoE device's network. PoE is considered safe, and hence its adoption is widespread. The technology conforms to IEEE standards, like 802. These standards provide ways to avoid overheating and ensure compatibility. If it is a PoE switch that is working properly and follows standard PoE protocols, no, it will not send power to anything that is not PoE-capable. This technology simplifies installations by eliminating the need for separate power cables for devices like IP cameras, wireless access points, and VoIP phones.
[PDF Version]