NBC 2016 Cable & Wire Compliance Matrix — Building Type to IS Standard
How NBC 2016 specifies cable for fire safety
NBC 2016 Part 4 governs cable choice and cross-references Part 8 Section 2 (Electrical and Allied Installations) for wiring rules. Three factors decide the cable grade for any given circuit:
- Reaction to fire — how the cable contributes to (or resists) flame, smoke and toxic-gas propagation. Governed in India by IS 694:2010 (PVC wires up to 1100 V, including FR / FR-LSH grades) and IS 17048:2018 (HFFR wires).
- Circuit integrity (Fire Survival) — whether emergency circuits (fire pump, alarm loops, smoke-extraction, PA, lift recall, stair pressurisation) continue to operate while engulfed in flame. Governed by IS 17505, IEC 60331 and BS 6387 CWZ.
- Cable routing context — escape route, lobby, service shaft, refuge area or general occupied space. NBC tightens the grade in escape routes and multi-floor shafts.
Enforcement sits with the State Electrical Inspectorate (CEIG/CEI) under the Indian Electricity Rules and the relevant State Fire Service. The fire NOC at occupancy stage checks that cable specification, ISI marking and BIS licence (CM/L) match the NBC 2016 row for the building type.
The compliance matrix — 8 building types mapped to NBC 2016 cable requirements
The matrix condenses NBC 2016 Part 4 (with cross-reference to Part 8 §2) into the cable grade and IS standard a specifier must call for. Storey thresholds (G+3, G+4, G+15, above G+15) follow NBC's "low-rise", "high-rise" and "special" classification.
| # | Building type / occupancy class | Storey | NBC 2016 reference | Mandatory cable grade | Acceptable alternatives | Cable specification | Verify against |
|---|---|---|---|---|---|---|---|
| 1 | Residential — Group A (small dwellings, individual houses) | up to G+3 | Part 4 §3 + Part 8 §2 | FR (Flame Retardant) | FR-LSH, HFFR (over-spec, allowed) | PVC-insulated single-core, 650/1100 V, oxygen index ≥ 29 | IS 694:2010 |
| 2 | Residential — Group A (apartment blocks) | G+4 to G+15 | Part 4 §3.1.1, Table 1 (Group A high-rise) | FR-LSH (Flame Retardant — Low Smoke & Halogen) | HFFR, HRFR | HCl emission < 15 %, smoke density (light transmittance) ≥ 60 % | IS 694:2010 Annex (FR-LSH variant) |
| 3 | Residential — Group A (high-rise) | above G+15 | Part 4 §3.1.1 (high-rise) + Part 4 §A-3 escape routes | HFFR (Halogen-Free Flame Retardant) | HR-FR-LSH for emergency circuits | HCl emission < 0.5 %, low smoke, zero-halogen | IS 17048:2018 |
| 4 | Commercial — Group E (offices, malls, IT parks, retail) | any | Part 4 §3 Group E + §A-3 | FR-LSH (G+4 and below); HFFR (above G+4 or > 15 m height) | HRFR for circuits passing through atria | Low-smoke, low-halogen; fire-rated barriers at floor penetrations | IS 694:2010 / IS 17048:2018 |
| 5 | Educational — Group B (schools, colleges, hostels, coaching centres) | any | Part 4 §3 Group B | FR-LSH mandatory (high occupant load of children) | HFFR for above G+4 | HCl < 15 %, smoke transmittance ≥ 60 % | IS 694:2010 |
| 6 | Hospitals, nursing homes, day-care, sanatoria — Group C (Institutional) | any | Part 4 §3 Group C — most stringent occupancy | HFFR (zero-halogen mandatory — patients cannot self-evacuate) | HR-FR-LSH on emergency / OT / ICU circuits | HCl < 0.5 %, zero corrosive gases, low smoke | IS 17048:2018 + IS 17505 for emergency loops |
| 7 | Hotels, assembly buildings — Group D (theatres, auditoria, convention halls, cinemas, places of worship over 300 occupants) | any | Part 4 §3 Group D + §A-3 escape routes | FR-LSH general; HFFR in lobbies, escape routes, basements | HR-FR-LSH on stage/PA/emergency lighting circuits | Low-smoke critical (panic-evacuation) | IS 694:2010 / IS 17048:2018 |
| 8 | Special buildings — airports, metro stations, data-centres, underground transport, tunnels, basements > 2 levels | any | Part 4 §3 Group F/G + Part 4 §A (special occupancies) | HFFR (Reaction-to-Fire) plus Fire-Survival cable on every emergency circuit | HR-FR-LSH on critical loads; mineral-insulated where IEC 60331-21 mandated | HCl < 0.5 %, IEC 60331 / BS 6387 CWZ on emergency circuits | IS 17048:2018 + IS 17505 / IEC 60331 / BS 6387 |
Engineering note (critical) — Reaction to Fire vs Fire Survival
> ### Two different products on two different standards. NBC 2016 requires both — on different circuits. > > Reaction to Fire = how the cable behaves during a fire — flame propagation, smoke, HCl / corrosive gas. > Standards: IS 694:2010 (FR, FR-LSH) and IS 17048:2018 (HFFR, HR-FR-LSH). > Tests: oxygen index, temperature index, smoke density (IEC 61034), halogen content (IEC 60754). > > Fire Survival = whether the cable maintains circuit integrity through a fire — does the conductor keep carrying current after the insulation has burnt off? > Standards: IS 17505, IEC 60331-21 / 60331-1 / 60331-2, BS 6387 (categories C / W / Z — flame, water spray, mechanical shock). Construction typically uses a mica-glass tape barrier under the insulation; some grades use mineral (MgO) insulation. > > NBC 2016 Part 4 requires Fire-Survival cable on every life-safety circuit: fire-pump motor feed, fire-alarm loops, smoke-extraction and pressurisation fans, PA / emergency communication, lift recall, escape-route emergency lighting, stair-pressurisation fans. > > Specifying FR / FR-LSH / HFFR on a fire-pump circuit when Fire-Survival is required is a professional liability error. HFFR will not propagate flame and will not emit HCl — but it also will not carry current to the fire pump three minutes into a real fire. The pump stops. > > BOQ rule: (1) general wiring → FR / FR-LSH / HFFR per the matrix (IS 694:2010 / IS 17048:2018); (2) emergency circuits → Fire-Survival per IS 17505 / IEC 60331 / BS 6387 CWZ as a separate line item.
See /learn/cable-fire-performance for the underlying numbers.
Common compliance failures and how to avoid them
The five errors most frequently flagged at fire-NOC stage and in insurance-claim disputes:
- Plain FR for buildings G+4 and above. NBC 2016 mandates FR-LSH minimum from G+4, and HFFR above G+15. Plain FR is acceptable only up to G+3. PVC in FR releases HCl that blinds occupants in escape stairs.
- Substituting FR-LSH for HFFR on hospitals. FR-LSH allows HCl up to 15 %; HFFR is < 0.5 %. Patients cannot self-evacuate — NBC routes hospitals to HFFR (IS 17048:2018), not FR-LSH (IS 694:2010). The BIS CM/L licence is separate.
- Mixing Reaction-to-Fire and Fire-Survival cable on the same emergency circuit. Splicing HFFR into a Fire-Survival run "for the last few metres" defeats the purpose. End to end — panel to pump / detector / fan — the circuit must be Fire-Survival.
- Missing ISI mark / CM/L verification at delivery. A drum printed "FR-LSH" is not necessarily FR-LSH. Drum, jacket and test certificate must all show the ISI mark and BIS CM/L number. Verify the CM/L is active on bis.gov.in before signing the GRN.
- Manufacturer not BIS-licensed for IS 17048:2018. A factory licensed for IS 694:2010 is not automatically licensed for IS 17048:2018 — separate licences, separate audits. Ask for the IS 17048:2018 CM/L specifically when buying HFFR.
How to verify the cable on your site matches NBC 2016
A 3-step procedure for the site engineer before signing the GRN:
- Check the jacket print. Continuous print on the outer sheath should show: manufacturer, voltage grade (e.g. 1100 V), conductor size, IS number (IS 694:2010 / IS 17048:2018), ISI mark and CM/L number. No CM/L printed → reject the drum.
- Verify the CM/L is active. On bis.gov.in → Conformity Assessment → Search Licensee, confirm the licence is current, the IS standard on the licence matches the IS printed on the cable (IS 694 vs IS 17048 — many holders have only one), and the manufacturer name matches the drum.
- Match the IS number against the NBC 2016 row for the building. Use the matrix above. For emergency circuits also verify the supplier's certificate against IS 17505 / IEC 60331-21 / BS 6387 CWZ.
Frequently asked questions
What cable type does NBC 2016 require for hospitals?
What is the difference between NBC 2016 G+3 and G+4+ cable requirements?
Does NBC 2016 mandate HFFR cable?
Where is NBC 2016 cable selection covered — which Part / Section?
Is FR-LSH acceptable for high-rise residential?
What is the cable requirement for a metro / airport / data-centre per NBC 2016?
Are FR and Fire-Survival cables interchangeable?
What happens if a building's cable doesn't meet NBC 2016?
Who enforces NBC 2016 cable requirements at site?
What is the difference between IS 694:2010 and IS 17048:2018?
Does NBC 2016 require BIS-certified manufacturers?
Can I use FR-LSH instead of HFFR for hospital wiring?
Updated weekly by the cablepriceindia.com price-research desk. Last verified: 12 July 2026. Sources cited inline. We are an independent price-discovery service. Verify any BIS Conformity Marking Licence (CM/L) at bis.gov.in.