To introduce to you: distribution cabinet wire connection standards

1, the minimum cross-sectional area of the switchboard insulated wire should be 1.0mm², for low-level electronic circuits are allowed to use the cross-sectional area of less than 1.0mm² (but not less than the requirements of the electronic equipment manufacturer for the installation of wire cross-section). When the cross-sectional area is not greater than 8mm², its bending radius should be greater than 3 times its outer diameter. The transition wires of the moving parts of the distribution panel, such as the panel, should have sufficient winding.

2. The insulation of the connecting wire should be resistant to moisture, mold and flame, and the insulation voltage level is: when the line operating voltage is less than or equal to 100V, the insulation voltage level should be greater than or equal to 250V; When the line operating voltage is greater than 100V and less than or equal to 450V, the insulation voltage level should be greater than or equal to 500V.

3. The wire should be correctly connected to the specified terminal in strict accordance with the drawing.

4. The wiring should be neatly arranged, clear and beautiful, and the wires are well insulated and without damage.

5. External wiring shall not cause additional stress inside the appliance.

6. Wiring should be carried out according to the sign of the terminal.

7. Connect the power indicator cable. The diameter of the cable is 1.5mm2.

8. The minimum diameter of a single route into the circuit breaker and leakage switch is 1.5mm2.

9. The minimum diameter of a single main circuit is 1.5mm2.

10. The minimum cable diameter of the switch jumper is 2.5mm2.

11. The minimum wire diameter of the primary winding entering the transformer is 1.5mm2.

12. The minimum cable diameter of the control circuit power jumper cable is 1.5mm2.

13. The minimum diameter of the control circuit is 1.0mm2.

14. The minimum cable diameter between the panel control loop and the baseplate is 1mm2.

15. Voltmeter wire connection wire with 1.5mm2.

16. The current transformer wire connection cable is 1.5mm2.

17. Use 1.0mm2 yellow conductor for the backup cable on the panel.

18. The cable used for lighting inside the cabinet is 1.0mm2.

19. Multi-core flexible wire for panel to bottom control line.

20. Soft and hard cables are used to connect the base plate.

21. Special cases :PLC, x41, y41 and other connectors can be 0.3mm2. When the panel and cabinet space is small, it can be used, but it must be approved by the person in charge.

22. The conductor head, tail end and middle of the main circuit should be marked with colored plastic sleeve (yellow, green and red).

23. The color of the power indicator cable is consistent with the power supply voltage level.

24. The color of the voltmeter connection wire corresponds to the voltage level indicated.

25. The current transformer cable should be black. The end must be covered with an insulating sleeve.

26. The end of the connection wire should generally use a special wire connector. When the terminal structure of the equipment is a platen insert type, use a flat pin copper connector to crimp and then connect. When the wire is a single-core hard wire, it can not be used as a wire connector, and the wire end is made into a ring connector and then connected.

27. If the cross section of the wire entering the circuit breaker is less than 6mm2, when the wiring terminal is a platen type, the wire is first crimped copper joint treatment to prevent the scattered wire; If the cross section of the wire is greater than 6mm2, the exposed copper part should be wrapped tightly with a fine copper wire ring and then connected to the pressure plate.

28. A single strand of copper or aluminum core with a cross-section of 10mm2 or less can be directly connected to terminals of equipment and appliances.

29. The multi-strand copper wire with a cross-section of 2.5mm2 or less should be tin lined or crimped before connecting to the terminal of the device or appliance.

30. For terminals with multiple aluminum cores or copper cores with a cross section greater than 2.5mm2, except the connector terminals delivered with the device, weld or crimp the terminals before connecting them to the terminals of the device or components.

31. No connector at the end of the wire: for the plug-in connector, L take the plug-in length of the plug-in terminal board; For the ring joint, L take the length of the ring joint to the appropriate straight section. The length of the straight part should be considered according to the radius of the flat washer, so that the flat washer is pressed on the ring joint just next to the insulation incision, and not on the insulation layer.

32. The specification and quantity of the wire shall comply with the design regulations; When the design is not specified, the total cross-sectional area of the guide wire, including the insulation layer, should not be greater than 60% of the cross-sectional area of the trough.

33. In the cable trough with removable cover plate, the sum of all the cross-sectional areas of wires at the wire junction including the insulation layer shall not be greater than 75% of the cross-sectional area of the cable trough; In the cable slot where the cover plate is not easily removed, the connector of the wire should be placed in the junction box of the cable slot.

34. When stripping the insulation layer, the wire core shall not be damaged, and the end face of the wire core and insulation layer shall be neat and perpendicular to the core core as far as possible. There shall be no oil or residue on the wire core.

35. Special wire stripping tools should be used to strip the wire insulation, which should not damage the wire core, nor damage the unstripped edge, and the incision should be smooth.

36. The clamping plate or other special fixture should match the specifications of the wire core. Fasteners should be tightened in place, and anti-loosening devices should be complete.

37. The wire and electrical components are bolted, inserted, welded or crimped, etc., and should be firm and reliable.

38. The casing connector and die should be matched with the conductor core specification.

39. Before crimping the joint, the rubber film, residue and oil on the copper core wire should be removed.

40. The winding direction of the ring joint should be consistent with the tightening direction of the terminal nut.

41. Check the joint before crimping, and there shall be no scars, rust, cracks, cracks and other defects that hinder the use of the joint.

42. In addition to the special wiring design, all terminals in the electric cabinet must be connected with standard crimping pliers and copper connectors that meet the standard.

43. After the control line of the cabinet door panel is completed, at least 20% of the spare lines must be placed, with a minimum of three.

44. The cabinet length of the spare cable shall be determined by the farthest component that can be connected to the cabinet.

45. If the panel has a wireless slot, roll the spare wire into a 100mm diameter wire coil and secure it securely to the cable tie of the panel with cable ties.

46. The cable core wires of the disk and cabinet should be arranged vertically or horizontally regularly, and should not be arbitrarily crooked cross-connected. Spare core length should leave an appropriate margin.

47. The wiring of the PLC input loop in the cabinet should not be laid in the same slot as the control line of the main loop and other voltage level loops.

48. Avoid connecting several wires to the same terminal post, and the joints on the general components should not exceed 2 to 3. When several wire connectors are connected to the same terminal post, the contact should be flat and good.

49. The central control console shall adopt the flame retarded Marine multi-stranded wire. Necessary anti-interference measures should be taken for wires transmitting information. The wire should be laid in the cable trough, or fixed with a clamping plate. The wires should be connected reliably and have relaxation measures.

50. The short cables of centrally arranged components, such as terminals, do not enter the cable slot to facilitate inspection and save cable slot space.

51. Cables leading into the cabinet should be neatly arranged, clearly numbered, avoid crossing, and fixed firmly, and do not cause mechanical force on the connected terminal block.

52. The grounding jumper wires of the panel and cabinet should not be wrapped into the harness.

53. The lighting line in the cabinet outside the exposed slot must be protected by winding pipe.

54. The exposed part of the panel wiring should be protected by winding tubes.

55. Rubber insulated core wires should be protected by insulated tubes.