NBC 2016 and NBCS 2026: what India's building code says about fire detection and alarm

Is NBC 2016 still the current code, and what changed in 2026?

No. The Bureau of Indian Standards notified in the Gazette of India on 30 April 2026 that SP 7 : 2026, National Building Construction Standards 2026, was established on that date, and that SP 7 : 2016, the National Building Code of India 2016, was withdrawn on the same date. The notification was issued under Rule 15(1) of the Bureau of Indian Standards Rules, 2018.

The new edition changed its name from 'Code' to 'Standards'. Its fire part is Part F, Fire and Life Safety, which carries forward and revises what NBC 2016 held in Part 4. The wording also moved from 'shall' to 'should'. NBC 2016 Part 4 said buildings 'shall be classified' by occupancy; NBCS 2026 Part F says they 'should be classified'.

Many documents still point to the 2016 edition. The Bureau of Energy Efficiency's Energy Conservation and Sustainable Building Code 2024, for example, cites NBC 2016 for water supply piping, and bye-laws, NOC conditions and tenders drafted before May 2026 may do the same. As of September 2026, confirm with the approving authority which edition it applies, and write that edition into the design brief. The changes in the NBCS 2026 Part F foreword that matter most for detection and alarm are below.

• A high-rise building is now one 24 m or above in height, irrespective of occupancy. NBC 2016 set the line at 15 m.
• The single table of fire-fighting requirements became Tables 7A to 7J, one for each occupancy.
• Guidance on detection and suppression by the type and intensity of industrial hazard was introduced.
• A new annex on performance-based design was added, with an informative annex on fire protection for specific industries.
• Height restrictions on buildings were eliminated, and occupant load factors, travel distances and compartmentation were updated.

What does the fire and life safety part of the code cover?

It covers how to keep a building's occupants safe from fire, from planning to fire-fighting equipment. NBCS 2026 Part F says it deals with the demarcation of fire zones, restrictions on construction in each fire zone, the classification of buildings by occupancy, types of construction by fire resistance, and the other requirements needed to minimise danger to life from fire, smoke, fumes or panic before a building can be evacuated. It also covers means of egress and fire protection through portable and fixed fire-fighting installations.

The text is organised in three broad areas, a structure introduced in the 2005 revision. Fire prevention covers passive protection in design and construction. Life safety covers egress and the features that protect occupants. Fire protection covers equipment such as extinguishers, hydrants, sprinklers and detection systems. A further clause adds requirements for specific occupancies.

NBCS 2026 Part F also carries annexes on high-rise buildings, atriums, data centres, car parking, metro stations, metro trainways, venting in industrial buildings, performance-based design and fire protection for specific industries.

How does the code classify buildings by occupancy?

Every building is placed in an occupancy group based on its use. Most fire requirements, including whether automatic detection and alarm is needed, depend on that group together with the building's height and floor area. Buildings with more than one use follow the rules for mixed occupancy.

The groups are almost the same in both editions, but the letters for storage and hazardous buildings are swapped, and NBCS 2026 adds a group for mixed use. A specification or NOC application that quotes a group letter should say which edition it means.

What does the code say about fire detection and alarm?

It says which buildings need a system, what the system should do, and which Indian Standards govern it. In both editions, clause 4.9 points to the occupancy tables for which buildings need automatic fire detection and alarm: a single Table 7 in NBC 2016, and Tables 7A to 7J in NBCS 2026. Both editions define an automatic fire detection and alarm system to include a manually operated electronic fire alarm (MOEFA) system, which can include manual call stations, a talk-back system and public address.

Clause 4.9 also sets out what the system is for and how it should be built. The main points below appear in both editions, with 'shall' in NBC 2016 and 'should' in NBCS 2026.

NBCS 2026 Part F also describes more detection technologies than point smoke and heat detectors: pneumatic linear heat detection, flame, gas and spark detection, video-based fire detection, fuel leak detection, beam detectors for high ceilings and linear heat sensing cable. It gives a guide to automatic detection systems for industrial, hazardous and storage occupancies.

• Detection and alarm should warn occupants early, so they can leave in an orderly and safe way.
• The system should be planned and programmed to operate other equipment, such as air handling units, pressurisation and smoke management systems, and the release of fire barriers and hold-open fire doors.
• In assembly and institutional buildings, and in all buildings above 30 m where a fire alarm is provided, detectors should also be fitted inside electrical shafts and lift machine rooms.
• Fire alarm panels should be connected peer-to-peer or with redundant cables run in different shafts, and each panel should be able to work standalone.
• Visual strobes or beacons may be considered, particularly in public buildings, for people with hearing impairment.
• Water level in all tanks, hydrant and sprinkler pressures, pump on and off status, and isolation valves with supervisory switches should be monitored from the fire alarm panel.

What does it say about PA, voice evacuation and the fire command centre?

Voice evacuation systems should use English, Hindi and the local language, with pre-recorded messages, and should be integrated with the fire alarm panels to alert the zone of fire and the surrounding zones or floors. NBC 2016 carried the same requirement. In the NBCS 2026 occupancy tables, public address and voice evacuation has its own column, next to the column for automatic fire detection and alarm.

The code also describes a fire command centre (FCC), a clause first introduced in NBC 2016. Under NBCS 2026 Part F, the FCC should be on the entrance floor with direct access, have 120-minute fire-rated walls with a fire door and emergency lighting, and hold the main fire alarm panel with a suitable public address system. All control and monitoring of fire alarm, pressurisation and smoke management systems should happen from this room, and the building's integrated BMS, CCTV and other critical parameters may also be monitored there.

This matters in integrated buildings. The FCC is where life-safety systems meet building and security systems, so the interfaces between them should be designed together. The cause-and-effect side is covered in our guide to integrating fire detection, PA and BMS.

How does the code relate to IS 2189?

The code sets out which buildings need detection and alarm and what it should achieve. IS 2189 is the Bureau of Indian Standards code of practice for the selection, installation and maintenance of automatic fire detection and alarm systems, and the code refers to it as good practice. NBC 2016 listed IS 2189 : 2008. NBCS 2026 Part F lists IS 2189 : 2026.

NBCS 2026 Part F also names accepted standards for detection equipment, including IS 2175 : 1988 for heat sensitive fire detectors, and parts of the IS/ISO 7240 series for point heat detectors, point smoke detectors, manual call points, beam smoke detectors and multi-sensor detectors. It says it is desirable to use fire protection equipment certified under the BIS Certification Marks Scheme.

IS 2189 and the IS/ISO 7240 parts are separate paid standards, and their requirements are not quoted here. A designer should work from the editions the approving authority accepts.

How does the code relate to state fire services acts and the fire NOC?

The code is guidance; the legal requirement comes from the state. NBCS 2026 Part F opens by saying that fire services are a State subject, included as a municipal function in the Twelfth Schedule of the Constitution under Article 243W, and that it is primarily the responsibility of state governments to ensure safety of life and property in their jurisdiction.

It goes on to say that states and Union Territories implement fire safety through their State Fire Services Act or through building bye-laws, and that the state fire service department is one of the agencies that issues a NOC for buildings. It describes Part F as only for guidance and referral for state governments and local authorities, and the foreword calls the document voluntary and non-binding: it applies when adopted by the authorities concerned or stipulated in a contract.

For an owner, this means three things decide the fire alarm design: the state's act, rules or bye-laws; the edition of the national standard they adopt; and the Indian Standards those refer to. The fire NOC is granted against the state's requirements, so confirm them before design starts, not at inspection.

How Ahuva approaches code conformance in fire systems

Ahuva's fire detection and alarm work covers addressable systems with smoke, heat, flame and gas detection, designed for NBC and NFPA conformance and integrated with PA, BMS and other safety systems. Its PA scope includes emergency voice evacuation integrated with fire systems and command centres.