Can You Plug non-PoE Devices Into PoE Switches? (Short Summary)

Power over Ethernet is a pretty awesome technology – it allows you to power various electronic devices using only an Ethernet (CAT6/CAT7) cable. But is this safe? And what happens if you accidentally plug a powered Ethernet cable into a non-PoE device? Will it get damaged?

Well in 95% of cases, nothing bad will happen. That’s because GOOD PoE switches and injectors will safely negotiate with the end device, to determine whether to send power of not. This means that if a device does NOT support PoE, the switch will only send internet traffic – and not power as well.

But you should be careful of “passive PoE switches”, because these always send power. They can cause a burn out of your device or its RJ45 Ethernet port.

I demonstrate all this in a quick 1 minute short video:

You can also view this short on:

I discuss the “dos and don’ts” of PoE in another article if you wanted to learn more about this topic.

cropped A picture of me Tristan
About Tristan Perry

Tristan has been interested in computer hardware and software since he was 10 years old. He has built loads of computers over the years, along with installing, modifying and writing software (he's a backend software developer 'by trade').

Tristan also has an academic background in technology (in Math and Computer Science), so he enjoys drilling into the deeper aspects of technology.

Tristan is also an avid PC gamer, with FFX and Rocket League being his favorite games.

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