Dumlupınar, Pendik

Dumlupınar is one of the Pendik neighbourhoods carrying older building stock, and the number of flats still holding a ceramic screw-in fuse board in the hall cupboard is far from negligible. These boards contain no residual current device at all, so protection against electric shock is zero; the fuse melts and welds into its base under overload, fails to clear a short circuit and the Bakelite body carbonises over time, giving off a burnt odour.

In a renewal the order matters: the insulation resistance of every branch is measured with a megohmmeter first and a condition report produced, because swapping an old board for a new one does not cure weak cable insulation. That report prioritises which legs need urgent renewal and which can be planned. Then a flame-retardant modular DIN-rail board is installed: an independent Type C breaker per room, dedicated circuits for kitchen and bathroom, a 30 mA Type A device and a Type 2 arrester at the intake; where no earth exists a solid copper rod is driven and its resistance measured.

If breakers trip in Dumlupınar 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 Dumlupınar, 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 Dumlupınar, leaving the modem in the living room weakens the signal in every other room. The lasting fix is pulling Cat6 data runs from the modem point to the rooms and mounting RJ45 data outlets on the wall; each run is verified with a cable tester and labelled. On a fibre subscription the distance between the ONT and the distribution point is kept short, and the fibre is never bent around sharp turns because going below the minimum bend radius degrades the signal permanently.

Low-voltage and mains wiring are never squeezed into the same conduit. If Cat6 and NYM run side by side in one pipe, electromagnetic noise from the mains couples into the data line and dropouts begin; those dropouts are not a breaker fault and replacing the board will not cure them. At Dumlupınar addresses data runs go in separate trunking or at least twenty centimetres away, and camera and intercom circuits are fed from their own 12-18 V leg.