(1) The metal trunking wiring is suitable for exposed laying in dry indoor places and places not prone to mechanical damage in normal environment, but shall not be used in places with serious corrosion to the metal trunking.
(2) All phase wires and neutral wires of the same circuit shall be laid in the same metal trunking. Lines without anti-interference requirements in the same path can be laid in the same metal trunking. The total cross-section (including outer sheath) of wires or cables in the trunking shall not exceed 20% of the cross-section in the trunking, and the number of current carrying conductors shall not exceed 30. For control, signal or similar lines, the total section of wires or cables shall exceed 50% of the section in the trunking, and the lower limit of the number of wires or cables.
(3) When the metal trunking of cable tray is installed vertically or obliquely, measures shall be taken to prevent the wires or cables from moving in the trunking.
(4) The lines led out from the metal trunking can be wired by metal pipe, hard plastic pipe, semi-hard plastic pipe, metal hose or cable. Wires or cables shall not be damaged at the outgoing part.
(5) The wire slot shall be flat without distortion and deformation, and the inner wall shall be smooth without burrs.
(6) The metal trunking of cable tray shall be reliably grounded or connected to neutral, but shall not be used as the grounding conductor of equipment.
The construction scheme uses the bus duct with shell and strengthening treatment, which has the advantages of beauty, durability, high rigidity, large bearing capacity and so on; The hanger is selected to increase the touch area between the hanger and the bus. The device process is simple and the connection is safe and reliable. It can increase the horizontal distance of hangers, reduce the number of hangers and bus duct joints, and save costs.
This scheme is applicable to the construction of bus duct device at the ceiling of most floors. The reinforced bus duct is customized in the factory. During production, the bus duct shell is stiffened and strengthened to improve the inertia moment and torque resistance of the shell, which can greatly improve the bearing capacity of the whole bus duct without increasing the thickness of the shell plate.
Jinan cable tray manufacturer believes that the selected hangers can be reused, and the hanger device with steel plate attached can fix the bus duct, which widens the touch area between the hanger and the bus duct, increases the device distance of the hanger, reduces the number of bus duct joints, and reduces the amount of materials.
After the explanation of the construction scheme for the installation of cable tray metal trunking, you can follow this website www.sddlqj Cn for more information.