Abstract: An arrangement for cooling of liquid-cooled electric devices, the arrangement being fitted to convey heat produced in the electric devices (3) away from the electric device by means of a liquid flowing through a cooling element of the electric device. The arrangement includes an instrument cubicle (1) with one or more electric devices (3) placed in it, a cooling apparatus (6ca), an inlet piping (10) and an outlet piping (11) connecting the electric device and the cooling apparatus for conveying a cooling liquid into the cooling element and out of the cooling element of the electric device (3). Below the instrument cubicle (1) is a footing element (2) housing an inlet main pipe (20) and outlet main pipe (21) connected to the cooling apparatus (6ca), the inlet piping (10) and outlet piping (11) being detachably connected to the main pipes. The arrangement enables indication of leakage situations occurring in the pipings.