According to an embodiment of the present invention, a power supply apparatus for detecting a gas leak is provided. The apparatus may include: a power supply pipe which is connected to a pump and has a power line passing therethrough, the power line supplying power from a power supply unit to a motor in the pump; a flexible joint pipe having one side connected to the power supply pipe and the other side connected to the power supply unit; a power inlet unit having one side facing the pump and the other side positioned on the power supply pipe so as to face the power supply unit to connect the power line, and preventing gas leak from one side to the other side in the pump; and a leak detection unit which fills the power supply pipe with an inert gas and detects a gas leak according to a change in pressure.

A cable tie with means to form a loop in order to mount cables against a panel or a marking badge. The cable tie has an integrated panel anchor having an elongated body in an area where the cable tie has an elongated cross-section and changes direction at least one time. The cable tie is intended to be mounted in a panel that has an opening with a shape that is a combination of a circular hole and a elongated opening. The mounting starts with a bending around the panel anchor which is then mounted into the openings elongated part. Then the cable tie is rotated typically 90 around the axis of the circular part of the opening. Then by releasing the bending, the band on each side of the panel anchor is fixed in the elongated part of the opening and the panel anchor is fixed towards the back-side of the panel.

An orientation hub couples an electromechanical device, such as a luminaire with at least one bottom facing light source coupled, covered by an orientation specific lensed optics. The orientation hub enables the luminaire to rotate so as to direct light toward a targeted surface. Other devices (perhaps passive devices) coupled to the hub can be rotated to align with at least one surface or a like device by at least one of a string and a laser beam. For example, the laser beam can be projected through an array of luminaires' eye-loops that support the weight of the suspended from above luminaires.