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Quality requirements for distribution cabinet

发布日期:2022-06-13 15:02:57   浏览量 :249
发布日期:2022-06-13 15:02:57  
249

1. main control items

(1) The test and adjustment results of cabinets (panels) must comply with the construction specifications.  

(2) The metal frame and foundation section steel of cabinet, panel, table, box and panel must be reliably grounded (PE) or connected to neutral (pen); The openable door equipped with electrical appliance shall be connected with the grounding terminal of the frame with bare braided copper wire and marked.

(3) The panel signboard and sign frame shall be complete, correct and clear.  

(4) The insulation resistance between lines and between lines to ground of lines between cabinets (panels, sets) and boxes (panels) must be greater than 0.5 М Ω; Secondary circuit must be greater than 1 М Ω;  

2. general items

(1) The cabinets, panels, tables, boxes and panels shall be connected with the foundation section steel by galvanized bolts, and the locking parts shall be complete.  

(2) The installation of distribution box (panel) shall comply with the following provisions:

The wiring in the box and panel shall be neat without hinge joint. The conductor shall be closely connected without damaging the core and the continuous strand of the wire. The cross-sectional area of the conductor pressed on both sides of the spiral under the washer is equal. No more than 2 wires shall be connected on the same terminal, and the anti inspection washer and other parts shall be complete. The circuit number is complete and the identification is correct.  

The switch in the box panel is flexible and reliable. For the circuit with leakage protection, the action current of leakage protection device shall not be greater than 30mA, and the action time shall not be greater than 0.1s.  

Neutral line (n) and protective grounding wire (PE) busbar are respectively set in the lighting box and panel. The case (plate) shall not be made of combustible materials, and the coating of the case (plate) shall be complete.  

The box position is accurate, the installation is firm, and the components are complete. The opening of the box body is suitable for the pipe diameter of the conduit. The cover of concealed distribution box is close to the wall.  

The vertical allowable deviation is 1.5 ‰, and the bottom edge is 1.5m from the ground [3].








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上海发控工贸有限公司
Shanghai Fakong Industrial and Trading Co.,Ltd.
Address:No.25,Lane 90,East Huangxi Road,Shanghai,China
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