There is no air conditioning in the small room with a replacement patch panel. Is a building inside every two layers set up a replacement patch panel of the small room, which put the two switches and patch panels, there is no installation of air conditioning, there is no problem ah more
Because the single-core tube, if there is a current flow from the wire. The metal sleeve will produce electromagnetic, and will heat, serious fire, so single-core cable shall not be alone in the steel pipe
My first feeling is the voltage is not enough, but you said you received the power, you received the power can only say that your input voltage is enough, your USB output voltage may not be enough ah, so I suggest you use a double-headed USB Line plug in the two interfaces try
There is an alternating magnetic field around the single wire, the magnetic field and the electromagnetic induction of the steel pipe produce eddy current in the steel pipe, which causes the fire of the steel pipe to cause the fire. The magnetic field of the same circuit is opposite to the opposite direction, and the magnetic field will cancel each other. Will cause eddy heat
