First: Material requirements: The equipment, equipment and materials used should comply with the current national technical standards, and should have product quality certificates, and the equipment should have **.
Second: The courtyard lamp itself: 1. The accessories of the courtyard lamp should be complete, without mechanical damage, deformation, paint peeling, lampshade cracking, etc. 2. The cross-section of the lamp cap wire should not be less than: copper wire-1.mm2; aluminum wire-2.5mm2.
Third, pin insulators: 1. Porcelain parts and iron parts should be tightly combined, and the iron parts should be galvanized well. 2. The enamel is smooth and free of defects such as cracks, lack of glaze, spots, burn marks, bubbles or burnout of enamel. 3. It is strictly forbidden to use sulfur-filled insulators.
Fourth, insulated wires: 1. There should be no twists, bends, breaks, and insulation damage. 2. The cross section of the down conductor should not be less than: copper wire-1.5mm2; aluminum wire-2.5mm2; the rated voltage should not be less than 500V.
Fifth, the lamp holder and hoop of the courtyard lamp: 1. The surface should be smooth and clean, free of defects such as cracks, burrs, flashes, sand holes, and bubbles. 2. It should be hot-dip galvanized. In case of partial peeling of zinc skin, red Zhang Dan and paint should be applied after rust removal.
Sixth, the bolts used to install garden lights: 1. There should be no cracks, sand holes, zinc peeling and rust on the surface of the bolts, and the bolts and nuts should be well matched. 2. Various connecting bolts on the metal should have anti-loosening devices, and the anti-loosing devices used should be well galvanized, with suitable elasticity and thickness in compliance with the regulations. In addition, check other materials, fuses, insulated wires, soft plastic tubes, rubber cloth, black tape, etc. carefully.
Seventh, the main machinery and tools needed for courtyard lamp construction: 1. Pulleys, hand hammers, adjustable wrenches, nylon ropes. 2. Levels, tape measures, foot buckles, straps, high stools, etc.
Eighth, the working conditions of the courtyard lamp: 1. The production of the lamp stand has been completed. 2. The construction of the overhead line has been completed.