REFERENCE · JULY 2026
NBC 2016 Part 8 §3.4 sets 1.5 sqmm as the floor: even though IS 3961:2024 ampacity for 0.5 sqmm is technically sufficient for a 0.4 A fan, you cannot legally specify below 1.5 sqmm for a fixed-appliance final sub-circuit in an Indian residential or commercial install.
Plain FR per IS 694:2010 is the everyday default for residential fan circuits up to G+3. Above G+3, NBC 2016 Part 4 mandates FR-LSH because of stairwell smoke / acid-gas limits. HFFR (IS 17048:2018) is reserved for hospital and transport-hub fan circuits where halogen-free is specified.
Listed alphabetically. Verify the BIS standard mark and CM/L licence at bis.gov.in.
Wire for Fan — Ceiling, Pedestal, Exhaust, BLDC
For a typical 75 W ceiling fan drawing approximately 0.4 A on 230 V, the canonical recommendation on a shared lighting/fan circuit is 1.5 sqmm Class 5 flexible copper, FR per IS 694:2010, on a 6 A or 10 A MCB. NBC 2016 Part 8 §3.4 sets 1.5 sqmm as the absolute minimum for any final sub-circuit serving fixed appliances, regardless of how small the fan load is — IS 3961:2024 ampacity is comfortably oversized for a fan. This page is a third-party comparison reference.
The Sizing Table — Fan Type to Cable
| Fan | Power (W) | Continuous Amps (230 V) | Recommended MCB | Recommended Cable | Flame Grade |
|---|---|---|---|---|---|
| Ceiling fan (induction motor) | 75 W | 0.4 A | 6 A shared | 1.5 sqmm Class 5 Cu (NBC minimum) | FR (IS 694:2010) |
| Ceiling fan (BLDC, BEE 5-star) | 28–35 W | 0.15 A | 6 A shared | 1.5 sqmm Class 5 Cu (NBC minimum) | FR |
| Pedestal / table fan | 100 W | 0.5 A | 6 A shared | 1.5 sqmm Class 5 Cu | FR |
| Exhaust fan (kitchen/bathroom) | 100 W | 0.5 A | 6 A shared | 1.5 sqmm Class 5 Cu | FR |
| Industrial high-volume ceiling (HVLS, ~750 W) | 750 W | 3.5 A | 10 A dedicated | 2.5 sqmm Class 5 Cu | FR / FR-LSH |
| Cassette fan (HVAC integration) | varies | per HVAC nameplate | per HVAC | sized as AC IDU | FR / HRFR |
Decision Tree — Load × Length × Ambient × Flame
- Confirm the fan is on a shared lighting/fan circuit. Typical Indian flats use one 6 A circuit per room covering 4–6 fan/light points. If the BLDC count exceeds ~10 points or HVLS is involved, split into two circuits.
- Check the NBC 2016 minimum. 1.5 sqmm copper for fixed-appliance circuits is non-negotiable per Part 8 §3.4 — this dictates the cable, not ampacity.
- IS 3961:2024 ampacity check (still required for the audit). 1.5 sqmm Cu in conduit reference = 17 A; the 6 A MCB rating sits at 35 % utilisation, so derating margin is generous.
- Voltage drop is rarely binding for a fan circuit because the load is small, but for very long room runs (over 30 m) check against the NBC 2016 3 % cap.
- Choose flame grade per the next section.
For circuit planning, use /tools/cable-size-calculator. For deeper derating reference, see /learn/is-3961-ampacity-chart.
Flame-Grade Selection (NBC 2016 Part 4)
| Building Class | Standard | Mandatory Grade |
|---|---|---|
| G+3 residential | IS 694:2010 | FR |
| G+4 to G+7 residential / small commercial | IS 694:2010 | FR-LSH |
| Hospital, airport, metro, mall atrium | IS 17048:2018 | HFFR |
| Industrial HVLS in production hall | IS 694:2010 / IS 1554 | FR (FR-LSH if smoke-controlled) |
Brand Options — 1.5 sqmm Class 5 Cu FR (Fan / Lighting Circuit)
| Brand | SKU example | Pack | Price |
|---|---|---|---|
| Finolex | 1.5 sqmm FR flexible | 90 m | See live price |
| Havells | Life Line Plus S3 1.5 sqmm FR | 90 m | See live price |
| KEI | Homecab FR 1.5 sqmm | 90 m | See live price |
| National Cables | 1.5 sqmm FR flexible | 90 m | See live price |
| Polycab | Green Wire HFFR 1.5 sqmm | 90 m | See live price |
| RR Kabel | Firex FR-LSH 1.5 sqmm | 90 m | See live price |
Common Mistakes — Fan Wiring
- Using 1.0 sqmm or 0.75 sqmm for fan circuits to save cost. NBC 2016 Part 8 §3.4 prohibits anything below 1.5 sqmm for fixed-appliance final sub-circuits — irrespective of how light the load is.
- Specifying plain FR in G+4+ buildings. NBC 2016 Part 4 mandates FR-LSH minimum from four storeys upwards.
- Combining the fan circuit with a 16 A geyser circuit on the same MCB. Geyser is dedicated; fan / lighting share only with similar low-load lighting.
- Skipping the loop-earth. Fan boxes must have a continuous earth back to the DB per NBC 2016 Part 8 §1.4 / IS 3043 — modern BLDC fans with metal blades and metal canopies are technically Class I appliances.
- Using Class 2 stranded for the fan flex from the canopy to the rod. Class 5 per IS 8130:2013 is correct for any flexible drop because of repeated handling during installation.
Frequently asked questions
What size wire for a ceiling fan?
1.5 sqmm Class 5 flexible copper, FR per IS 694:2010, on a shared 6 A or 10 A MCB. NBC 2016 Part 8 §3.4 sets 1.5 sqmm as the minimum for any fixed-appliance final sub-circuit — IS 3961:2024 ampacity for 1.5 sqmm Cu is 17 A, far above the 0.4 A fan draw.
Can I use 1 sqmm for a fan circuit?
No. NBC 2016 Part 8 §3.4 prohibits sub-1.5 sqmm conductors for fixed-appliance final sub-circuits. 1 sqmm is permitted only for internal fixture wiring inside light fittings, not for the in-wall final sub-circuit.
What size wire for a BLDC fan?
Same as a conventional fan — 1.5 sqmm Class 5 Cu FR. The BLDC motor draws less current (0.15 A vs 0.4 A) but the NBC 2016 minimum size still applies.
How many fans on a single circuit?
Typically 4–6 fan/light points per 6 A circuit per the IS 3961:2024 ampacity of 1.5 sqmm copper (17 A reference) and NBC 2016 Part 8 sub-circuit guidance. Diversity factor is generous for fan loads.
What size cable for an exhaust fan?
1.5 sqmm Class 5 Cu FR per IS 694:2010 — same as a ceiling fan. Exhaust fans pull ~0.5 A on 230 V which is well inside the IS 3961:2024 ampacity at the NBC 2016 minimum size.
What size cable for an industrial HVLS fan (high-volume low-speed)?
2.5 sqmm Class 5 Cu on a dedicated 10 A MCB. HVLS fans draw ~3.5 A and benefit from a dedicated circuit so the inrush does not nuisance-trip a shared lighting MCB.
Should the fan loop be Class 2 or Class 5?
Class 2 stranded for the fixed wall-buried run; Class 5 flexible for the canopy / down-rod drop. Most installers use Class 5 throughout for ease of pulling, which is acceptable per IS 694:2010.
Does the fan circuit need an earth?
Yes. Modern fans (especially BLDC) are Class I appliances with exposed metallic parts, so a continuous earth conductor of the same size as the phase is required per NBC 2016 Part 8 §1.4 / IS 3043.
Should the fan switch be 6 A or 16 A?
A 6 A switch is sufficient for a ceiling, pedestal, table or exhaust fan — the 0.4–0.5 A draw is far inside the rating. 16 A switches are reserved for heavy appliances and sockets per NBC 2016 Part 8.
What is the right flame grade for fan wiring?
FR per IS 694:2010 in G+3 housing. FR-LSH for G+4 and above per NBC 2016 Part 4. HFFR per IS 17048:2018 in hospitals, airports and metro stations.
Can I run the fan circuit and the AC circuit on the same MCB?
No. The AC requires a dedicated 16 A or 20 A circuit per NBC 2016 Part 8 — sharing it with the fan/lighting circuit risks nuisance tripping during compressor start and provides no isolation.
How do I verify the fan-circuit cable is BIS-certified?
Every metre of jacket prints "ISI", "IS 694:2010", manufacturer name and a CM/L licence number. Cross-check the CM/L at bis.gov.in/standard-mark-licence before installation.
METHODOLOGY
Updated weekly by the cablepriceindia.com price-research desk. Last verified: 17 July 2026. Sources cited inline. We are an independent price-discovery service. Verify any BIS Conformity Marking Licence (CM/L) at bis.gov.in.