What happens if you start using PoE with a cable that is not properly crimped?

Question

Iron

Will the device burn or not?
It seems that PoE has protection. But does it work if the cable is curved?

Answer 1

If PoE is according to the 802.3af / at standard, then it should see and not apply voltage. If Passive PoE - how lucky

Answer 2

should not
The main advantage of PoE sources that support these standards is the intelligent operation scheme. It allows you to avoid damage to equipment, extend its service life, save energy consumption. Before powering a connected device, an 802.3af/at active PoE source (switch or adapter) negotiates with it and determines: Whether the connected device supports Power over Twisted Pair technology. If not, electricity will not be supplied through the network cable. What voltage is needed for the device. The PoE source will set its power class and apply the appropriate voltage to the port. Whether the device is turned on at all (whether it consumes electricity). If not, the power supply through the cable stops. Whether the powered device has been overloaded. If yes, the power supply is stopped.
Source: https://lantorg.com/article/faq-po-poe-chast-2 © LanTorg.com

Answer 3

What is "crooked"? PoE works on the last brown pair... If the brown pair on one of your sides is not the last one... Then it won't work...
If you don't have a brown pair on both sides, then it's clear what "crooked crimped" is focus on the last pair...
Another "crooked" is sometimes called a cross-over cable, PoE will definitely work in it...
And the rest is a lottery.