1.The distance between the hangers of the horizontal and straight type cable tray is 1.5m~2m. If the hanger support is used, the diameter of the hanger should not be less than 8mm, and a fixed support should be set at the lintel.
2.Set up a set of hangers on both sides of the turning, and the two sets of hangers are symmetrically arranged, and the distance between the two sets of hangers is not more than 1.5 meters, otherwise a set of hangers is added in the middle of the turn.
3.Set up a set of hangers on both sides of the turning, and the two sets of hangers are arranged symmetrically, with a distance of no more than 1.5 meters; otherwise, a set of hangers will be added in the middle of the turn 150mm.
4.Straight type cable tray and wire slots are accurately set out, processed and installed according to special angles.
5.The total length of the Straight type cable and its support should be no less than 2 in the connection with the grounding trunk line; the first two ends of the cable tray must be reliably connected to the shell of the power distribution cabinet or the ground bar.
6.The two ends of the connecting plate between the non-galvanized cable trays are connected to the copper core grounding wire, and the grounding wire must pay attention to the special grounding hole of the wire slot cable tray. The minimum allowable cross-sectional area of the grounding wire is not less than 4mm²; Insulation layer; the two ends of the connecting plate between the galvanized cable trays are not connected to the grounding wire, but the two ends of the connecting plate are not less than 2 connections with lock nuts or lock washers.
7.To cooperate with the civil engineering, the bridge frame passes through the walls, floors and other parts and leaves holes in advance.
8.The cable trough and the bottom plate of the bridge frame should be fixed with metal bolts to the cross arm of the support and hanger (≤200mm, fixed with one bolt; >200mm, fixed with two bolts 1/4 away from the side).
9.Cable tray passing through walls and floors should be sealed with non-combustible materials; fireproof sealing must be done in the cable trays passing through fire compartments.
10.The installation height of outdoor installation cable tray should not be lower than the height of snow accumulation and water accumulation. At the same time, consider the use of waterproof cover plates to enter and exit outdoor cable tray and trunking. The indoors must be higher than the outdoors to prevent rainwater from flowing into the indoors.
11.Straight type cable tray with a length of more than 30 meters, and aluminum alloy or fiberglass cable trays with a length of more than 15 meters are provided with expansion joints; cable trays are equipped with compensation devices when they cross the deformation joints of buildings.