When selecting wires in a warehouse environment, factors such as safety, durability, load requirements, and special working conditions must be considered comprehensively. The following are specific suggestions and key points:

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✅ Core Principles
1. Current Carrying Capacity Matching
✔️ Calculate the current based on the total power of the equipment (formula: I=P/U), reserving a 20%~30% margin to prevent overheating due to overload.
⚠️ For example: If lighting + monitoring totals 5kW, use a cable with ≥30A (e.g., BV-4mm² copper core wire).
2. Insulation and Sheath Grade
✔️ Prioritize double-layer cross-linked polyethylene (XLPE) insulation, with a temperature resistance of up to 90℃ and better aging resistance than ordinary PVC.
🔧 For outdoor or humid areas, use waterproof cables (e.g., YJV22 for underground laying).
3. Flame Retardant Requirements
✔️ According to national standard GB/T 18380, fire-retardant cables of the ZR series (passed the bundle burning test) must be used in storage areas.
📌 In key areas (chemical storage areas), it is recommended to upgrade to NH-type fire-resistant cables, which can maintain power for 90 minutes at 800℃.

🏭 Selection Guide by Scenario
| Area Type | Recommended Model | Feature Description | Typical Application Examples |
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| Regular Rack Area | ZR-YJV 0.6/1kV | Flame retardant + low smoke and halogen-free, armored and rodent-resistant | LED lighting circuits, power supply for security systems |
| Low-Temperature Cold Storage | DCXF/DCXFH Cold-Resistant Cable | Remains flexible at -40℃, preventing cracking | Refrigerating units, temperature control sensors |
| Dusty Environment | BTTZ Mineral Insulated Cable | Metal sheath fully enclosed structure, explosion-proof and anti-static | Grain silos, flour mills |
| Mobile Equipment | Rubber-sheathed flexible cord (heavy-duty YCW) | Multi-strand fine-stranded copper conductor, small bending radius | Forklift charging, lifting platform control lines |
| Long-Distance Transmission | VV22 aluminum core cable + cable tray | Low cost and lightweight, suitable for main roads >50 meters | Connecting lines from the main distribution box to the distribution box |

⚡️ Special Considerations
🌟 Grounding System Design
- Adopt TN-S three-phase five-wire power supply, and all metal racks need to be equipotentially connected (≤4Ω grounding resistance).
- Set up safety island grounding points every 30 meters in the rack aisle to eliminate the risk of static electricity accumulation.

🔧 Installation Standards
- For overhead wiring, use wire clips with a spacing of ≤80cm, and leave expansion bends (6 times the pipe diameter) at corners.
- When passing through firewalls, fire-resistant mud sealing kits (Firestop Collar) must be installed.

📋 Compliance Certification
- Must pass CCC mandatory certification and mark the production license number (starting with XK).
- For imported equipment matching cables, check the compliance of EN 50525 standard in CE certification.

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💡 Common Misconceptions Correction
× Incorrect understanding: "As long as it's thick enough"
✓ Correct approach: A logistics center once caused a short circuit and fire due to the use of non-standard RVV flexible wires, and later changed to ZR-YJV fire-retardant cables and passed third-party testing (according to GB/T 17651 for bundle burning test).

× Ignoring environmental factors: In a chemical raw material warehouse, non-corrosion-resistant cables were not selected, resulting in sheath cracking and leakage within two years.
✓ Solution: Change to tin-plated copper conductor + fluoroplastic insulated FEP cable, with corrosion protection grade IP68.

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🛠️ Maintenance Suggestions
1. Use an infrared thermal imager to check the joint temperature every quarter (normal <65℃), and issue a warning if the abnormal temperature rise exceeds 15℃;
2. Establish cable management files, recording the laying date, route map, and test reports;
3. Apply anti-rust paint twice a year to the exposed parts of the cable tray.

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📌 Typical Configuration Cases
Actual solution for a certain automobile parts center warehouse:
- Main lines: ZR-YJV22 8.7/15kV 3×120mm² (direct burial)
- Branch circuits: WDZCN-BYJ(F) low-smoke halogen-free flame-retardant wire (concealed in metal pipes)
- Emergency lighting: NH-KVV fire-resistant cable with separate circuit power supply
- Lightning protection coordination: Equipped with a Class I surge protector (In=20kA), connected to the PE wire of each circuit.

When this scheme passed the fire inspection, the measured flame spread index was ≤5m/min, fully meeting the requirements of GB 50116.