Yakacık Çarşı, Kartal

The slope kolon comes out of the stair well; the neutral is read looser here. This is not the Uğur Mumcu common kolon; that note is cooperative mid-to-high-rise. This is not Orhantepe sıfırlama; that note is a 1970 hall. A market ground shop does not share the upper-floor 30 mA. If three-phase is absent it is not invented. A busbar is not landed before the label is seen. Schneider NSX, Siemens 3VA and ABB Tmax torque the same job differently. If a contactor sits the label is read; an OSB MCC is not invented. An aluminum–copper joint is not torqued without a ferrule. If a sign driver sits under the eave without IP it leaks to the body. PG gland, the gland nut and the NYY outer diameter are chosen from the label; 'one rubber is enough' is a fire mark. Cevizli M4 three-phase sits on that note; a narrow slope is not a plaza.

In Yakacık Çarşı, 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.

If breakers trip in Yakacık Çarşı when the air conditioners start on a summer evening, the first job is measuring inrush with a clamp meter. In most flats the units hang off a socket circuit and peak at thirty-five to forty amperes on start-up; the existing C16 breaker sees that surge thermally and opens. Enlarging the breaker is not the answer, because it leaves the 2.5 mm² cable unprotected and raises the fire risk.

The correct installation runs a dedicated circuit from the board to the outdoor unit: 3x2.5 or 3x4 mm² according to power, a C20 or C25 motor characteristic breaker and its own residual current device. In multi-split flats like those in Yakacık Çarşı, all three phase currents and the neutral are read separately and loads redistributed across the busbar, because air conditioning clustered on one phase heats the neutral terminal to around one hundred and sixty degrees. The interconnecting cable is specified screened and the condensate line is never routed below a socket.