Answer: (1) When the cable needs to be laid with protec […]
(1) When the cable needs to be laid with protective tube, the inner diameter of the pipe should not be less than 1.5 times the outer diameter of the cable. The inner diameter of concrete pipe, clay pipe, asbestos and cement pipe should not be less than 100mm;
(2) The bending radius of the cable tube shall comply with the requirements for the bending radius of the cable to be penetrated;
(3) Each pipe shall not exceed a maximum of three bends, and there shall be no more than two right angle bends.