The distribution box in the shaft shall be provided with factory certificate, production license, "CCC * certification mark, copies of certification certificate and test records.
The specification and model of cable tray used in the electrical shaft shall meet the design requirements. The thickness of galvanized products and galvanized steel plates shall not be less than 15mm when the bridge width is less than 400mm; When it is between 400 ~ 800mm, the thickness shall not be less than 2mm; When it is greater than 800mm, the thickness shall not be less than 2.5mm.
Fireproof plugging material (fireproof pillow) and fireproof coating shall be finalized products identified by the state.
Auxiliary materials used in the electrical shaft include drill bit, welding electrode, oxygen, acetylene gas, blending paint, solder, flux, rubber insulating tape, plastic insulating tape, black tape, etc.
The metal expansion bolt shall be determined according to the allowable tension and shear force and the installation hole diameter of the equipment.
The wiring terminal shall be selected according to the wire section and the number of wires, and the wiring terminal of corresponding specification shall be used.
The cable tray shall be straight without obvious distortion, and the support shall be welded firmly without significant deformation; The blanking error shall be within 5mm, and the notch shall be free of curling burr.
Wires, cables and accessories shall be products conforming to the current national technical standards, and shall be provided with factory certificate, "CCC certification mark and copies of certification certificate. Wire and cable tray shall also have production license, which shall meet the specification selection of cable tray.
Galvanized materials of cable tray: steel plate, round steel, flat steel, angle steel, bolt, nut, screw, washer, spring washer and other metal materials shall be galvanized products.