I bought an ordinary USB extension cable, can not use what is the matter, usb camera how to use long-distance monitoring, USB is not four lines, there are two signal lines, the other two is the power cord, can Then an external power supply (5V) to the usb camera total electricity, I saw the Internet bar monitoring there is an external power supply, more
You can use USB2.0 extension cable is ten meters, there is a USBHUB with a network cable can pass 50 to 100 meters
Shake table (insulation resistance table) Our company is the choice of 2500V2500M Europe can be
Threaded pipe excellent mechanical properties can be very good resistance to corrosion, can also be used under high pressure
. it is estimated that you say that the low-voltage cable is our common cable for the 380V system, right? . in accordance with national norms, this cable with 500V shake shake table can be, the insulation resistance should not be less than 0.5MΩ, each phase should be shaken, do not shake the core (not shake the line of fire or zero line) to Grounded.
