Solar System में कौन-सा Cable, Connector, MCB-SPD इस्तेमाल करें? सही Cable Size, Fire Protection और Safety Guidelines पूरी Detail में पढ़ें।
🔌 Solar DC Cable क्या होता है?
Solar Panel → DC Current Flow
इसलिए Solar System में AC Cable नहीं, DC Cable Required ✅
Solar DC Cable Features:
✔ UV Resistant
✔ Weather Proof
✔ High Temperature Proof
✔ Double Insulated
✔ Fire Retardant
📌 Solar Cable = Rooftop पर्यावरण में लंबे समय तक Safe Performance ✅
🔍 Solar Cable Size कैसे चुनें?
Current Calculation Formula:
Current (A) = Solar Panel Watt / Panel Voltage
| DC Cable Size | Solar System | Distance |
|---|---|---|
| 4 sq.mm | 1–3 kW | 10–20 Meter |
| 6 sq.mm | 3–6 kW | 20–50 Meter |
| 10 sq.mm | 6–10 kW | 50+ Meter |
⚠️ Thin Cable = High Heat + Fire Risk ❌
🔗 MC4 Connector क्या होता है?
Solar Panels को Parallel/String में Safely Connect करने के लिए Standard Connector:
✔ Waterproof
✔ Weather Resistant
✔ High Voltage Compatible
➡ गलत Connector → Arcing 🔥 + Fire ❌
⚡ Solar Protection Devices (Most Important)
| Device | Function | Location |
|---|---|---|
| DC MCB | String On/Off & Short-Circuit Protection | Panel से Inverter तक |
| SPD (Surge Protection Device) | Lightning Protection | DC + AC दोनों Side |
| Fuse | Overcurrent Safety | String Side |
| Isolator | System Shutdown Control | Inverter से पहले |
📌 Safety = Zero Compromise ✅
🔁 System Safety Connection (Flow Diagram)
Connection Architecture:
Solar Panel → DC Fuse/MCB → SPD → Inverter → AC MCB → Home Load/Grid
💰 Price List India 2025
| Item | Price Range |
|---|---|
| DC Cable (4 sq.mm) | ₹40 – ₹80 / Meter |
| DC Cable (6 sq.mm) | ₹70 – ₹120 / Meter |
| MC4 Connector Pair | ₹60 – ₹200 / Pair |
| DC MCB | ₹200 – ₹600 |
| DC SPD | ₹500 – ₹2,000 |
| AC MCB | ₹150 – ₹500 |
Top Brands:
Polycab, KEI, Jainson, L&T, Havells, Phoenix Contact
🚨 Common Mistakes to Avoid
| Mistake | Danger |
|---|---|
| Ordinary AC Wire Used | Fire Risk |
| Local MC4 Without Certification | Loose Connection |
| SPD Skip कर देना | Lightning Damage |
| Cable Thickness गलत | High Heat |
| Wiring Loose | Heavy Loss |
📌 Solar में Local Material = घर को खतरा ⚠️
✅ Conclusion
Solar Safety = Right Cable + Right Protection + Right Installation ✅
✔ DC Cable सही Size
✔ MC4 Certified
✔ DC & AC Protection Devices
✔ Proper Termination & Testing
➡ Safe System = Long Life + High Output ⚡
❓FAQs — Solar Cable & Safety
Q1. क्या DC Cable को दीवार के अंदर डाल सकते हैं?
➡ हाँ, Conduit Pipe में Safe है ✅
Q2. क्या हर Solar System में SPD जरूरी है?
➡ हाँ, Lightning से Protection के लिए Must ✅
Q3. क्या MC4 Universal होता है?
➡ हाँ, लेकिन Genuine Brand ही Use करें ✅
Q4. कौन सा अच्छा Cable Brand?
➡ Polycab / KEI / KEC (IS & IEC Certified)
