Secondary Wiring of MNS Power Distribution Cabinets

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The secondary wiring of MNS power distribution cabinets is an important part of the installation and commissioning of power distribution cabinets. The following is a detailed introduction to it:

### Preparation Work for Secondary Wiring
- **Familiarize with Drawings**: Carefully study relevant drawing materials such as electrical schematic diagrams and wiring diagrams. Clearly understand the positions, functions of each electrical component, as well as the connection relationships among them, and determine the routing and path of the wiring.
- **Preparation of Tools and Materials**
- **Tools**: Prepare tools such as wire strippers, crimping pliers, soldering irons, screwdrivers, wrenches, and multimeters.
- **Materials**: According to the design requirements, prepare materials such as wires of appropriate specifications, wire number tubes, cold-pressed terminals, cable ties, and insulating tapes. Ensure that the material, cross-sectional area, insulation performance, etc. of the wires meet the requirements.
- **Component Inspection**: Inspect all the electrical components inside the power distribution cabinet to ensure that their appearance is not damaged, the wiring terminals are not loose, and the functions are normal.

### Construction Steps of Secondary Wiring
1. **Wire Layout and Arrangement**
- **Wire Layout**: According to the requirements of the drawings, start from the power supply end of the distribution box, and rationally lay out the wires according to the positions of each component and the routing of the connections. When laying out the wires, pay attention to leaving an appropriate margin in the length of the wires to facilitate subsequent wiring and maintenance, and avoid wiring chaos caused by the wires being too short or too long.
- **Wire Arrangement**: Organize the laid wires according to certain rules to make them neatly and orderly arranged. Usually, wires of the same functional group or the same routing can be tied together to form a wire harness.
2. **Wire Stripping and Crimping**
- **Wire Stripping**: Use wire strippers to strip off an appropriate length of the insulating layer at both ends of the wire, generally 6 - 10mm. The specific length is determined according to the specifications of the wiring terminals. When stripping, be careful not to damage the core wires of the wires.
- **Crimping**: For multi-strand flexible wires, it is necessary to twist the core wires tightly first, then put on the appropriate cold-pressed terminals, and use crimping pliers to crimp. The crimping should be firm to ensure good contact between the wire and the terminal without looseness.
3. **Wiring**
- **Wiring According to the Drawings**: Strictly wire according to the electrical schematic diagrams and wiring diagrams, and connect the other end of the wire to the corresponding wiring terminals of the electrical components. When wiring, pay attention to the tightening force of the wiring terminals to avoid poor contact or damage to the terminals due to over-tightening or under-tightening.
- **Clear Identification**: Put wire number tubes on both ends of each wire, and the markings on the wire number tubes should be consistent with the markings on the drawings to facilitate future maintenance and troubleshooting.
4. **Fixing and Tying**
- **Fixing**: Fix the wire harnesses or single wires on the framework or wire grooves of the power distribution cabinet through wire clips, nylon cable ties, etc. The spacing of the fixing points should be uniform, generally 200 - 300mm, to prevent the wires from shaking or shifting.
- **Tying**: Tie the wires with nylon cable ties or binding wires. The tying should be firm and neat to avoid the wires from being loose.
5. **Inspection and Testing**
- **Appearance Inspection**: Check whether the overall layout of the secondary wiring is neat and beautiful, whether the insulating layer of the wires is damaged, whether the wire number tubes are clear and correct, and whether the wiring terminals are tightened.
- **Continuity Test**: Use a multimeter to conduct a continuity test on each circuit to check whether the circuit is unobstructed and whether there are faults such as short circuits or open circuits.
- **Insulation Test**: Use an insulation resistance tester to test the insulation resistance of the secondary circuit to ensure that the insulation resistance of the circuit meets the requirements, generally not less than 1MΩ.

### Precautions for Secondary Wiring
- **Safe Operation**: When performing secondary wiring operations, the power supply must be cut off first to ensure that the work is carried out in a de-energized state and prevent electric shock accidents.
- **Wiring Specifications**: The laying of wires should avoid parallel laying with the main circuit and high-current lines to reduce electromagnetic interference. If it cannot be avoided, shielding measures should be taken.
- **Reliable Grounding**: A reliable grounding should be set for the secondary circuit of the power distribution cabinet, and the cross-sectional area of the grounding wire should meet the requirements, generally not less than 4mm².
- **Reserve Spare Wires**: Reserve a certain number of spare wires at appropriate positions inside the power distribution cabinet for future use when adding or modifying the circuit.#tiktokrefugee#cat#tiktokban#china#抖音难民#transformers #transformer #electrical #technology #factory #foryou #viral #shortvideo #manufacture #machine #power #shorts #trending #wiring #factorywork #electricalengineering #powertransformer #electriacaltransformer #manufacturing #process #manufacturer #manufacturingprocess #HighVoltageWinding #usa #canada #australia #uk#dailyvlog #daily #bluecollar #Tesla#WorkshopDaily #electricwire #powerengineering #transformer #foilwinding #lowvoltagenation #electricalengineering #LowVoltageFoilWinding #FoilWinding #ElectricalEngineering #TransformerDesign #InductorDesign#TransformerTechnology #ElectricalEngineering #FoilWinding #TransformerManufacturing #EnergyEfficiency #ElectricalDesign #TransformerWinding #EngineeringInnovation #TransformerTechnology #CopperFoilWinding #PowerTransformers #EngineeringTechniques #ElectricalComponents