ELV Systems.
Coordinated safety, visible only when needed.

ELV (extra-low-voltage) covers fire alarm, CCTV, access control, PA, nurse-call, intercom, structured cabling, gate barriers and screening — grouped because they share pathways, controllers and cause-and-effect logic. Every safety and security service that runs at less than 50 V AC: fire alarm, CCTV, access control, PA, nurse-call, intercom, structured cabling, gate barriers and screening. They are grouped because they share installation pathways, share controllers in many cases, and need to be coordinated as one cause-and-effect system. Treating them as separate contracts is how integration gaps appear.

Most ELV systems are mandatory under NBC 2016 and IS codes for commercial, hospitality, healthcare and educational buildings above defined thresholds. Under NBC 2016 and the relevant IS codes, addressable fire alarm, voice-evacuation PA, hydrant networks and emergency lighting are mandatory in commercial, hospitality, healthcare and educational buildings above defined occupancy and height thresholds. CCTV is mandatory in regulated sectors such as banks, ATMs, malls and some institutional clients. We engineer to the code that applies and prepare the drawings the local fire and police NOC require.

Fire, CCTV, access and PA integrate through a written cause-and-effect matrix that is documented per building, programmed once and tested on commissioning. A written cause-and-effect matrix. On a fire-alarm event from a specific detector, the matrix triggers a sequence: lifts home to ground, magnetic door-holders release, PA announces the affected floor, BMS shuts AHU dampers, CCTV pre-records the area, and access control switches to evacuation mode. The matrix is documented per building, programmed once, and tested on commissioning.

CCTV retention is 30 days for commercial, 60 days for hospitality, 90 days for healthcare and government, and 180 days where regulated. 30 days for most commercial buildings, 60 days for hospitality, 90 days for healthcare and government, 180 days where regulated. Storage is sized by retention × bitrate × camera count, not by the headline 'channels' number on a panel. We provide a written storage calculation in every CCTV quote.

An ELV AMC is a documented programme of preventive checks plus written response SLAs — without it, ELV systems silently degrade until they fail when needed. A documented programme of preventive checks (panels tested quarterly, batteries swapped on schedule, hydrant pumps load-tested annually, CCTV firmware updated on a calendar) plus response SLAs in writing. ELV systems silently degrade — batteries weaken, sensors drift, firmware needs patching. AMC is what keeps them genuinely working on the day they are needed.

CCTV camera count comes from a coverage plan against the architect's drawings — typically 18–28 cameras per 1,500 sq m commercial floor — not a procurement instinct. A coverage plan, not a procurement instinct. We mark every entry, exit, lift lobby, corridor junction, perimeter line and high-value zone on the architect's drawings, then assign camera type — fixed, varifocal, PTZ, panoramic — based on the field of view that zone actually needs. A 1,500 sq m commercial floor typically lands at 18–28 cameras; bigger numbers usually mean someone has confused coverage with reassurance.

IP CCTV is the default for any new install in 2026; HD-over-coax has only a narrow place where existing coax must be reused on small (under 16-camera) retrofits. IP is the default for any new install: higher resolution, smarter analytics, network-native, simpler cabling on Cat6A with PoE. HD-over-coax (HDCVI, TVI) still has a narrow place where existing coax must be reused and the budget cannot stretch to recabling. Below 16 cameras and on retrofit footprints, analogue may still pay back; above that scale, IP wins on every axis.

Yes — fire NOC and police licensing paperwork is part of our integrated scope, with drawings prepared to the format the local authority requires. As part of the integrated scope. Drawings prepared to the format the local fire authority requires, hydrostatic test certificates, hydrant flow tests, addressable panel commissioning logs, and the cause-and-effect matrix. For police licensing on regulated CCTV deployments (banks, ATMs, certain hospitality), we prepare the technical schedules the authority expects. The client signs; we deliver the supporting paperwork.