It stipulates requirements for enclosure materials, installation dimensions, the mandatory "one equipment, one switch, one RCD" rule, mechanical structure, earthing systems, component selection and marking. secondary unit substation is a close-coupled assembly consisting of. This chapter governs the design, construction, installation, alteration and repair of elevators and conveying systems and their components. 2 Elevator emergency communication systems. Introduced in August 2014, two new European standards for elevator design and manufacture will bring considerable benefi ts in terms of accessibility and safety for both passengers and service technicians. Ventilation and cooling equipment for elevator machine rooms, control rooms, machine spaces and. This standard focuses on electric elevators and provides detailed instructions for standardized installation and maintenance of elevator safety equipment and electric safety devices, as well as guide rails, landing doors, car doors, balancing weight systems and locking device operation. It covers. tem's memory as a “Knowledge Database”. The systems perform assignments to the most-used locations, and th reby provide superb.