How the spacing of the hangers of the bridge is determined
Cable ends should be marked with cable head symbols, the middle line should also be different from the ordinary wiring. Bv at the beginning of the general wire, with YJV or vv is generally a cable, but not limited to these
Cable bridge for lighting and the same purpose of less than or equal to 4 square millimeters of the line with the lighting line quota for power or more than 4 square millimeters of the lighting line applied power line quota
How to determine whether the square of the cable is standard
