🔌 1. Introduction
Electricity is the backbone of any industrial setup. But if not managed properly, it can become a serious safety hazard. In this blog, we’ll explain key concepts like:
- Phase to Phase and Phase to Neutral voltage
- Earthing to Neutral importance
- The difference between MCB, RCCB, and ELCB
⚡ 2. Phase to Phase vs Phase to Neutral
- Phase to Neutral Voltage: Typically 230V in India. Used for running general machinery, lighting, and office equipment.
- Phase to Phase Voltage: 400V (in a 3-phase supply). Used for heavy machines like motors, compressors, etc.
Danger: Wrong connections can damage machines or cause fire hazards.
🛑 3. Earthing to Neutral: Why It Matters
- Earthing: Provides a path for fault current to flow safely into the ground.
- Neutral: Return path for current in normal operation.
- Mixing or improper bonding can:
- Trip protection devices unnecessarily.
- Causes electric shocks due to potential difference.
🔧 4. Electrical Protection Devices
| Device | Full Form | Function | Common Use |
| MCB | Miniature Circuit Breaker | Protects against overload & short circuit | Homes & industrial panels |
| RCCB | Residual Current Circuit Breaker | Protects against earth leakage & electric shock | Safety device for human protection |
| ELCB | Earth Leakage Circuit Breaker | Older version of the RCCB detects leakage to earth | Less common now |
✅ 5. Conclusion & FRIQS Advice
- Always use properly rated MCBs & RCCBs.
- Ensure neutral and earth are correctly connected and tested.
- Hire certified professionals for factory electrical setup.
At FRIQS Automation, we don’t just automate—we ensure safety first.