Hidden Electrical and Intercom Faults in Nairobi Apartments: Real Cases That Could Lead to Major System Failures and Fire Risks.

Apartment managers and property developers often focus on visible problems such as faulty gates, broken lifts, leaking roofs, or malfunctioning CCTV cameras. However, some of the most dangerous issues are hidden behind ceilings, electrical ducts, and communication cabinets where residents rarely look.

At Boardtac Solutions, we are called almost daily to troubleshoot intercom systems, access control systems, CCTV networks, and structured cabling installations across Nairobi. During a recent intercom repair assignment in Kilimani, we encountered two faults that demonstrate how small electrical mistakes can escalate into major building safety risks.

These are the kinds of hidden problems that many apartment buildings in Nairobi may already have without realizing it.

Case Study 1: Intercom Indoor Station Not Responding

Our technicians were called to an apartment in Kilimani after a resident reported that their indoor video intercom station was not responding.

The first suspicion was that the indoor monitor itself had failed. However, after removing the device and connecting it in a different apartment unit, the indoor station powered on normally and worked perfectly.

This immediately indicated that the problem was not the indoor station.

Our Investigation Process

To identify the fault, we followed a systematic troubleshooting procedure:

Tested the indoor monitor on another apartment unit.
Checked network connectivity between the apartment and the floor communication cabinet.
Tested the cable from the apartment unit to the wire duct located near the elevator.
Verified cable continuity and signal transmission.
Inspected the PoE (Power over Ethernet) switch serving that floor.

After completing the tests, we discovered that the cable was functioning correctly.

The actual fault was a damaged PoE switch port that had developed a short circuit.

The failed port could no longer provide network communication and power to the indoor station, causing the apartment intercom to appear completely dead.

Why This Matters

Many apartment buildings rely heavily on PoE switches to power:

Video intercom systems.
IP CCTV cameras.
Access control devices.
Network infrastructure.
Smart building systems.

When a single PoE port develops a fault, residents may lose communication with security personnel, visitors may be unable to call apartments, and emergency communication systems may be affected.

Without proper testing equipment, replacing indoor monitors unnecessarily can become expensive while the actual fault remains unresolved.

Case Study 2: Six Floors Without Intercom Service.

During the same assignment, we encountered a much more serious issue.

Residents from multiple floors reported that their intercom systems were not responding.

Upon inspection, we found that the communication switches on Floors 1 to 5 were operational.

However, every switch from Floor 6 upwards was completely off.

This suggested a common power distribution failure affecting all upper floors.

The Root Cause

As we traced the power supply wiring, we made a concerning discovery.

The power cables feeding the PoE switches had been cut and directly joined into the building’s electrical power cables.

Instead of using proper power distribution equipment, protection devices, or dedicated power supplies, improvised connections had been made within the electrical system.

Further investigation revealed that at the sixth floor, an electrical short circuit had occurred.

The damaged section had overheated and shown signs of burning.

As a result, power was completely interrupted from that point upwards.

Every communication switch above that floor lost power, causing intercom failure across multiple levels of the building.

The Hidden Fire Risk in Many Nairobi Apartments

Unfortunately, this is not an isolated case.

Boardtac Solutions frequently encounters:

Poor cable terminations.
Overloaded power connections.
Improper cable joints.
Exposed conductors.
Non-standard electrical modifications.
Missing circuit protection.
Poorly installed network switches.
Mixed low-voltage and high-voltage cabling.

While these shortcuts may appear to save installation costs initially, they can create significant risks including:

Fire Hazards

Improper electrical joints increase resistance and heat generation.

Over time, this heat can damage insulation and ignite surrounding materials.

Equipment Damage

Voltage fluctuations and short circuits can destroy:

Intercom systems.
CCTV cameras.
Network switches.
Access control systems.
Routers.
Fibre networking equipment.

Building-Wide System Failure

A single fault point can affect dozens or even hundreds of apartments.

As seen in the Kilimani case, one electrical fault disabled communication systems across multiple floors.

Increased Maintenance Costs

What begins as a simple wiring shortcut can later require expensive emergency repairs, equipment replacement, and resident disruption.

Best Practices for Apartment Intercom and Network Infrastructure

To ensure reliable building communication systems, property managers should:

Conduct Regular System Audits.

Routine inspections help identify developing faults before they cause outages.

Use Proper PoE Switch Installation.

Switches should be powered using approved power supplies and protected circuits.

Avoid Improvised Electrical Connections.

Every connection should comply with electrical installation standards.

Separate Data and Power Cabling

Low-voltage communication cables should not be mixed with high-voltage electrical wiring.

Implement Preventive Maintenance

Waiting until residents complain often means the fault has already become serious.

Preventive maintenance reduces downtime and repair costs.

Why Professional Troubleshooting Matters

Many building managers assume that a non-responsive intercom means a faulty indoor monitor.

In reality, the fault could originate from:

Network switches.
Power supplies.
Structured cabling.
Electrical distribution systems.
Fibre links.
Communication cabinets.

Professional diagnosis prevents unnecessary equipment replacement and identifies underlying safety concerns before they become major incidents.

Boardtac Solutions: Apartment Intercom and Security System Specialists in Nairobi

At Boardtac Solutions, we provide professional installation, maintenance, troubleshooting, and repair services for:

Apartment Video Intercom Systems.
IP Intercom Networks.
CCTV Surveillance Systems.
Access Control Systems.
Biometric Attendance Systems.
Fibre Optic Networks.
Structured Cabling.
PoE Network Infrastructure.
Gate Automation Systems.

Our field experience across Nairobi has shown that many building faults start small but can quickly escalate into major security, communication, and fire safety issues if left unattended.

If your apartment building is experiencing intercom failures, CCTV outages, network instability, or electrical concerns affecting security systems, early professional inspection can save significant repair costs and improve resident safety.