What we find that a normal walk-through misses.

The breather's silica gel keeps moisture out of the transformer oil. Once it saturates (blue → pink), water enters the oil, dielectric strength drops, and the insulation ages fast. The end of that road is a transformer fault that takes the whole community offline.

A DB door is the last barrier between a maintenance technician's hand and 230V. An exposed live terminal turns routine work into a shock hazard, and a stray screwdriver tip into an arc flash.

Undersized breakers nuisance-trip on normal load; oversized breakers let cables run hot before tripping. The oversized case is the dangerous one — wires inside the wall heat up, insulation degrades, and a fire starts behind the drywall before any breaker notices.

An EFR sitting at factory defaults will not trip when it should. Fault currents that should clear in milliseconds keep flowing — long enough to start a cable fire or hold a person in contact with a live surface.

A panel left off does not detect smoke, does not sound alarms, and does not trigger evacuation messages. Residents only learn there is a fire when they smell it. Floor-by-floor evacuation, designed to take minutes, instead happens in panic.

In auto mode the pumps start the moment hydrant pressure drops, which is the moment a hose is opened or a sprinkler activates. In manual mode, someone has to physically reach the pump room and press a button — during a fire, in smoke, while everything else is happening.

The brigade inlet is how the fire department pumps water into the building's standpipe. If their truck cannot reach it, internal hydrants and sprinklers stay dry. Towing a car takes ten minutes the building does not have.

Fire shafts are designed for instant access — break-glass keys, captive keys, or no lock at all. A normal padlock means whoever has the key has to be located, woken, and brought to the shaft before firefighting can begin. The fire does not wait.

A wet riser carries water up the building under pressure so firefighters can connect a hose at any floor. With the valve closed at the base, all the floor outlets are dry. Crews arriving at floor 18 find an empty pipe.

Without floor-level fire-stops in service shafts, a fire on a lower floor sends smoke and flame straight up the shaft to every floor above. Compartmentation — the principle that lets one floor burn while others stay safe — is gone.

A fire escape must end where you are safe — outside, at ground level. Discharging into the basement means evacuees walk straight into the smoke layer they just escaped, and toward a level where firefighters cannot easily reach them.

The FACP is the brain of the entire detection-and-alarm system. With it dead, smoke detectors register nothing, manual call points do nothing, and evacuation announcements never play. The building has the parts of a fire alarm but none of the function.

A lightning strike sends thousands of amps down the LA conductor. If a gas line runs alongside, the strike can side-flash to it — puncturing the pipe and igniting the contents in the same instant. Required separation exists for exactly this reason.

NBC requires gas to run below electrical because a leaking gas line wets a cable above it; an electrical fault in that cable then has a fuel source directly under it. The clearance is the difference between a leak and an explosion.

A reversing car or a delivery truck only needs to clip an unprotected pipe once. Bollards or kerb-mounted barriers are the cheap, code-required answer; without them, the LPG main is one fender-bender away from a leak.

Filter backwash carries the dirt the filter just trapped. Without a non-return valve, that dirt can flow backward into the recycled-water main during a pressure drop. Once contaminated, the line stays contaminated until it's flushed.

A pressure-reducing valve protects fixtures from main-line pressure that would burst them. Bypassing it sends full pressure to taps and flush tanks meant for low pressure — taps drip, flush valves leak, and a fixture eventually splits.

A water line above live electrical equipment is one joint failure from disaster. A drip into the UPS shorts the battery bank; a leak into the panel triggers a flashover. Both can ignite the room.

UV light is what kills pathogens in treated wastewater before it goes back into landscaping or flush systems. A failed lamp means untreated effluent — bacteria, viruses, the lot — flowing to taps that residents and gardeners touch every day.

When someone is trapped in a stalled car, the intercom is the only fast way they speak to the security desk. With it dead, they bang on the doors and hope a neighbour hears. Children, elderly residents, and anyone without a charged phone are most exposed.

Most disputes — package theft, hit-and-run in the parking, vandalism — are reported a week or more after they happen. Five days of footage means the evidence is already overwritten by the time anyone goes looking.

Debris in the pit fouls buffers and limit switches; debris in the door rails jams the doors. Both produce mid-floor stops, mis-levelling and the kind of door re-cycling that traps a passenger and damages the rollers at the same time.

The barrier at exit is a deterrent against unauthorised vehicles leaving and a chokepoint where security can verify a car. With it down, anyone can drive in or out — including someone leaving with stolen goods.