Colour coding in electrical wiring is not just a convention — it is a safety standard. In India, IS 694 specifies the colour coding for electrical wires and IS 7089 governs insulation tape colour usage. Every electrician must know which colour goes where.
Why Colour Coding Matters
Correct colour coding enables any electrician — whether they installed the wiring or not — to instantly identify phase, neutral and earth conductors. Wrong colour coding causes dangerous confusion, especially during maintenance and fault-finding, and can lead to electrocution or fire.
⚠️ Warning: Using incorrect wire or tape colours is a violation of IS standards and creates serious safety risks for anyone working on the installation later.
The Complete Indian Colour Coding Guide
| Colour | Wire Type | Application | Standard |
|---|---|---|---|
| 🔴 Red | Phase / Live (L) | Single phase live conductor | IS 694 |
| ⬛ Black | Neutral (N) | Neutral conductor, earth bonding | IS 694 |
| 🔵 Blue | Neutral (3-phase) | Neutral in 3-phase, cold water | IS 694 |
| 🟩 Green | Earth (E/PE) | Protective earth, grounding | IS 694 |
| 🟡 Yellow | Phase 3 (L3) | 3rd phase in 3-phase systems | IS 694 |
| ⬜ White | General | Light fixtures, AC wiring, general | IS 694 |
3-Phase Colour Coding in India
For 3-phase electrical systems in India, the standard colour coding is:
- Red — Phase 1 (L1)
- Yellow — Phase 2 (L2)
- Blue — Phase 3 (L3)
- Black or Green — Neutral
- Green/Yellow stripe — Earth/Ground
Using Insulation Tape for Colour Coding
When re-taping or marking conductors, always use the correct colour FR PVC insulation tape. This is especially important when:
- Splicing or jointing wires of the same colour
- Marking the phase end of grey or black cables
- Identifying wires at junction boxes and distribution boards
- Re-insulating damaged wire ends
Ammolite FR PVC Insulation Tape is available in all 6 IS standard colours — Red, Black, Blue, Green, Yellow and White — making it the complete colour coding solution for every electrician in India.
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Get All 6 Colour Tapes from Ammolite
IS 7089 certified FR PVC tape in every IS standard colour. ₹20 MRP per roll.
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