How to choose the diameter of the power cable threading protection tube?
If you are using a cable that is suitable for direct burial, you do not need a casing. But in the place into the building, should be casing, in order to protect. General steel pipe can be.
Ming assembly line tube card 1 meter a, turn from the wall 10 a square, far away, the tube will fall down.
PE cable that waterproof cable can be a short time to soak the water PE water pipe is used to transmit water to the water pipe than the requirements of the drainage pipe than the cable all PE high hardness
