电缆保护管是指为了防止电缆受到损伤，敷设在电缆外层，具有一定机械强度的金属保护管。电缆保护管主要安装在通讯电缆与电力线交叉的地段，防止电力线发生断线造成短路事故，引起通讯电缆和钢丝绳带电，以保护电缆、交换机、机芯板，以至整机不被烧坏，对电力线磁场干扰也起到一定的隔离作用。
多斯螺旋管（杭州）有限公司主要生产光纤保护管和普通电缆保护管，以及标准淋浴软管和用于医疗设备的金属软管。
DOSFLEX is producing flexible metal tubes for protecting fiber optic cables as well as electrical cables. We also produce standard shower hoses and flexible hoses used in medical equipment.
在这些申请的情况下，光纤电缆应规定保护管，不要频繁移动。
In case of such applications, the optical fibre cable should be laid in protective tubes and not be frequently moved.
弯曲半径根据电缆截面型号选择，一根保护管最多不能超过三个弯头，垂直弯头不能超过两个。
The arch radius should be chosen according to the model of cable section; there should not be more than 3 elbows on one protecting pipe, and there should not be more than 2 vertical elbows.
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