Where should the inner diameter of the plastic tube of the cable be at least the number of times the outer diameter of the cable? The cable is more online
Sprinkler 3 meters a bridge and the distance between the fire pipe is generally about 1 meter. Fire sprinkler for the fire sprinkler system, when the fire, the water sprinkled through the sprinkler splashing pan for fire, the current is divided into drooping sprinkler, vertical sprinkler, ordinary sprinkler, Sprinkler and so on. Fire pipe is for the establishment of the fire pipe system, due to special needs, fire pipe thickness and material have special requirements, and spray red paint, transport fire water. Cable bridge is divided into trough, tray and ladder-type, mesh and other structures, by the bracket, arm and installation accessories and other components. The inner frame of the building can be set up independently or attached to various structures and corridors. It should be characterized by simple structure, beautiful appearance, flexible configuration and convenient maintenance. All parts are galvanized. , Installed in the building outside the bridge.
The corresponding crystal head how to play to see the project design is T568A or T568B program
Is a power three-wire cable, 1 * 240 +2 * 120 refers to the cable contains a cross-sectional area of 240 square millimeters of a cable, and the cross-sectional area of 120 square feet of the two cable, each cable has an external insulation Layer, so that with the outer protective layer in the cable wrapped, but insulated from each other
