Çınardere, Pendik

Çınardere is 1990s cooperative and complex stock on a steep slope. In these buildings the common lighting board feeds the stair timer, floor sensors and car park fittings from a single leg; when one sensor fails that leg stays permanently loaded and the terminal heats. Because a common area fault gets confused with the flat's own wiring, residents hunt for a fault in their own board when the problem is in the building's common board.

For diagnosis the common board is opened, the stair timer and sensor circuits separated one by one to find which point is holding the load, and the failed sensor replaced. On the riser lengthened by the slope, NYY cables running up the external elevation suffer sheath deformation from sun and frost; those sections are renewed in underground grade cable or inside UV-resistant trunking. The common board is moved into a gasketed enclosure and every terminal tightened with a calibrated screwdriver.

In Çınardere, a deformed socket plate, crackling from inside the box or a sharp plastic odour is a definite sign the terminal has begun to melt, and that outlet must be taken out of service immediately. The cause is almost always a loose screw connection: current crossing the contact resistance carbonises the copper, resistance climbs further and the terminal passes 200 degrees, melting the cable insulation. A FLIR thermal sweep finds the point without opening the wall.

The repair cuts blackened conductor ends back to clean copper, replaces the back-box and closes junctions with Wago 221 lever terminals rather than twists or tape. At heavy points such as a kitchen counter, an unbroken TSE-certified 3x2.5 mm² solid copper cable is pulled from the board and each major appliance given its own breaker. All screw connections are tightened with a calibrated screwdriver to between 2.5 and 3.5 Nm; hand tightening leaves an invisible slackness and the fault returns at the same point.

In Çınardere a washing machine, tumble dryer, dishwasher and electric heater often feed from a single outlet through a multi-way extension block. Once the current through one 2.5 mm² run approaches thirty amperes the cable insulation chars, the socket box blackens and warmth is felt through the wall; the extension block body itself begins to melt. A True-RMS clamp meter measures that current with the appliances running together, leaving nothing to guesswork.

The fix is splitting the circuit rather than upsizing the breaker, because a larger breaker leaves the cable unprotected and raises the fire risk. Continuous loads such as a dryer or heater get 3x4 mm² on a C20, the washing machine 3x2.5 mm² on a C16, and each run is pulled unbroken from the board. Charred cable is never patched but renewed back to the board, with the existing cross-section measured by micrometer so the breaker rating matches.