What are the technical specifications for the installation of aviation obstacle lights?
21.1 Main Control Project
21.1.1 Installation of Building Lanterns must follow specific guidelines to ensure safety and functionality. The lanterns placed at the top of the building should be equipped with rainproof lamps, and the lampshade must be securely fastened. The wiring should be laid in a clear pipe system that is also waterproof. Connections between pipes, pipelines and lamp boxes, metal conduits, and steel cables should be grounded properly using either a protective earth (PE) or a combined neutral and earth (PEN) line. This ensures electrical safety and compliance with standards.
The vertical suspension arm used for hanging lanterns should be made of channel steel no less than 10#. The bolts used for securing the steel cables to the end of the arm should have a diameter of at least 10 mm. These bolts should be fixed on the channel steel, with nuts on both sides and secured with flat washers and spring washers to prevent loosening over time.
The diameter of the hanging wire rope should not be less than 4.5 mm, while the bottom round steel should have a minimum diameter of 16 mm. A ground anchor should be used for the cable tray of the overhead outer line, with a burial depth exceeding 1.5 meters to ensure stability and durability.
The vertical lantern must be equipped with a waterproof lamp head, and the lower part of the lamp should be installed at a height of more than 3 meters from the ground to avoid accidental contact and ensure visibility.
21.1.2 Neon lighting installation requires special attention to insulation and safety. The neon tubes must be intact without any cracks or damage. The lamps should be mounted on special insulating brackets, ensuring they are firmly fixed. After installation, the distance between the lamp and the building surface should be at least 20 mm to prevent short circuits or overheating.
The transformer used for neon lights should be of the double-ring type, and the length of the neon tube should not exceed the allowable load length. In outdoor environments, additional rainproof measures should be taken to protect the transformer from weather damage.
The secondary wiring connecting the neon transformer to the lamp should be high-voltage insulated wire with a rated voltage higher than 15 kV. The distance between this wire and the building surface should also be at least 20 mm to maintain safety and prevent electrical hazards.
21.1.3 Landscape lighting fixtures must meet strict electrical safety requirements. The insulation resistance between the conductive parts of each lamp and the ground should be greater than 2 MΩ to ensure proper isolation from the earth. Floor-standing luminaires installed in crowded areas like sidewalks should be placed at a height of more than 2.5 meters from the ground if there is no fence protection.
All metal frames and accessible parts of the luminaires should be reliably grounded (PE) or zero-connected (PEN), with clear markings to indicate the grounding points for maintenance and safety checks.
21.1.4 Aviation obstacle sign lights require precise placement to ensure maximum visibility. These lights should be installed at the highest point of the building or structure. If the top area is large or part of a group of buildings, additional lights should be placed at the outer corners to provide full coverage.
If the light is installed on a chimney, it should be placed 1.5 to 3 meters below the chimney and arranged in a regular triangular pattern to ensure even illumination. The selection of the luminaire depends on the installation height: red low-intensity lights are used for installations below 60 meters, with an effective light intensity of at least 1600 cd, while white high-intensity lights are used above 150 meters, depending on the background brightness.
The power supply for the aviation obstacle light should be designed according to the main building's highest load requirement. The lamp must be installed firmly and reliably, with provisions for easy repair and replacement of the light source.
21.1.5 Garden lights must also meet specific installation standards. The insulation resistance between the conductive parts of each lamp and the ground should be greater than 2 MΩ. Column-type street lights, floor-standing street lights, and special garden lamps should be securely fixed with complete anchor bolts. The junction box or fuse box of the luminaire should have a complete waterproof gasket to prevent moisture ingress.
Metal posts and luminaires should be connected to the protective earth (PE) or zero (PEN) line. A main grounding line should be installed along the position of the garden lamps, forming a ring network. At least two connection points should be made to the grounding device. Branch lines from the main line should connect to the metal lamp post and the ground terminal of the lamp, with clear identification marks for maintenance purposes.
21.2 General Items
21.2.1 The installation of building lights should ensure that the lampshades at the top of the building are intact and free of cracks. The lanterns and their wiring should be well-maintained, with wires laid straight and neatly to avoid tangling or damage.
21.2.2 For neon installations, the transformer should be mounted at a height of at least 3 meters. If it is below this height, protective measures such as barriers or covers should be used. The transformer should be located in a convenient area for maintenance, hidden from non-maintenance personnel, and not installed inside the ceiling. When neon lights are installed near windows, interlocking devices should be installed between the window door and the primary side switch of the transformer to prevent accidental activation when the door is open.
Secondary wires from the neon transformer should be fixed using glass-insulated supports, with a maximum support spacing of 0.5 meters for horizontal segments and 0.75 meters for vertical segments to ensure stability and reduce sagging.
21.2.3 The structure of landscape lighting fixtures must be securely fastened, with all anchor bolts tightened and spare caps in place. Any exposed wires or cables should be protected by flexible metal conduits to prevent mechanical damage.
21.2.4 Aviation obstacle sign lights should be installed with a horizontal and vertical spacing of no more than 45 meters between lamps on the same building or group. An automatic on/off control system should be installed to ensure accurate operation and energy efficiency.
21.2.5 Garden lights must be equipped with an accurate automatic on/off control system. Each set of luminaires should have complete fuses that match the lamp specifications. Overhead line pole street lights should be securely fastened, with all fasteners complete and properly tightened. The lamp positions should be correct, and each set of lamps should have fuse protection for added safety.
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