Güllü Bağlar, Pendik

Güllü Bağlar in Pendik is characterised by mixed building fabric with small workshops at ground level and flats above. When a joinery, lathe or auto-electrical shop below runs pulsed loads such as a welder or compressor, sudden current surges appear on the shared riser; lamps flicker on the upper floors and television and modem boards degrade over time. Residents assume a grid fluctuation, but the source is inside the building.

The solution is separating the workshop feed from the residential riser entirely and running dedicated circuits for pulsed loads, with the right cross-section and a motor characteristic device for the welder. On the residential side an over/undervoltage protection relay and a Type 2 arrester are added to protect appliance boards. In the workshop board the earth continuity of machine chassis is measured, because on an unearthed lathe or welder a live frame is a direct risk to life.

If breakers trip in Güllü Bağlar 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 Güllü Bağlar, 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.

In Güllü Bağlar 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.