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Super easy to remember! Mnemonics for electrical work; Mnemonics for electrical construction standards. 1. Requirements from the foreman: Electricians, please pay attention – remember the construction procedures carefully. Based on the design drawings, carefully examine them and ask questions. Cross-construction involves many variations; standards and regulations must be thoroughly memorized. Provide a briefing before construction begins, and the material plan should be submitted in advance. Civilized construction comes first, with safe production taking top priority. Technical measures must be effective, and quality assurance must be systematic. Model practices should be promoted, and T.Q.C. should be implemented for quality. Advanced technology should be adopted, and new processes should be used for operation. Inspect the materials and equipment first, and fill out the record form in detail. The products must come with certificates of conformity, and all inspection certificates must be available. II. Construction preparation: There are many items to prepare, which are listed in detail below. Power and lighting distribution boxes, high-voltage voltage distribution cabinets. Wires, cables, rigid busbars, large lighting fixtures, and lightning protection. Circuit breakers and transformers, various types of instrument transformers and motors. Operating mechanism and instruments, emergency power supply capacitors. Don’t forget transformer oil; batteries use sulfuric acid solution. Both pipes and wires need to be inspected, as do cement electric poles. The supplementary materials must be qualified, and all attachments should be complete. Installation holes should be prepared in advance, and their positions and elevations must be accurately determined; the beams, columns, walls, and ceilings should be aligned with the openings, as well as the decorative surfaces with the edges of the boxes. The unevenness needs to be corrected; areas that are 2 centimeters low must be repaired. The surrounding seal must be tight, without any gaps, to ensure an attractive appearance. III. Wiring installation: Buried pipelines must be protected, and the pipes should be installed at the center of the wall. The structural pipes need to be rust-removed, and anti-corrosion paint should be applied to the earth walls. Reinforcing bars in the tube should be tied together; the main bars must not be welded to the tube. Tubes should be connected using threads; sleeve welding butt joints are also acceptable. For pipes over 70 mm in diameter, sleeve welding is permitted. Align the pipe opening with the center of the sleeve, and ensure the sleeve’s length is standard. For 2.2x diodes, the outer diameter applies; welding of thin tube sleeves is strictly prohibited. The pipe clamp connects to the ground wire, and welding must be performed on both sides at each end. The diameter of the ground wire is specified, and flat steel must be welded on three sides. The welded length of flat steel is twice its width, while that of pipes is 6d times the diameter. The main reinforcement is used as a lightning conductor, and the downlead section must be welded. Measure and record the ground resistance first, and ensure that all schematic diagrams for hidden inspections are complete. Powered by TN—S; the protective ground box is connected. If the wall thickness is less than 2 millimeters, no ground wire compression connection is required. At the points where the wire tube enters and exits the box, threaded lock nuts are used. The wire tube should be concealed inside the box, with spot welding applied around its edges. Spot welding is done in only three to five areas, with the welds coated in anti-corrosion paint twice. The alternating current is below 50 volts, with 102 volts as the limit for direct current. It belongs to the safe voltage category, and no bypass wiring is required for the piping. Fire alarm button junction box should not be installed behind a concealed wall box. All embedding work is completed, and the grounding connections must be thorough. Conceal work upon completion of the process, and conduct timely inspections for acceptance. The hidden content is divided into five points, with all project locations specified in detail. The zones are connected to the grounding electrode, with wire conduits embedded within the structure. It cannot be placed inside the ceiling; pipes need to be laid for concealment. The main reinforcement connections are used for lightning protection; the resistance before shielding is measured and recorded first. Don’t forget buried cables; fill in the types and specifications as well. Write the record details thoroughly; don’t cut corners just because it’s troublesome. All three parties sign for the acceptance, and the documents are stored in the archive. For engineering changes that require negotiation, the design institute should be approached to address the difficulties. IV. On-site installation: Most of the work is completed in coordination with the project, and conditions are available for wiring installation. The structural engineering has been verified, and the brick-concrete finishing is nearly complete. The finished product is well protected, and dryness inside the pipes ensures insulation. For safe construction, the colors of the wires must be distinguished. The colors of the main lines need not be distinguished; the branches to boxes must be clearly marked. The neutral wire should be light blue, while the phase wires are yellow, green, and red. Green and yellow are for PE; they should not be chosen arbitrarily. All parts of the concealed piping system must be connected tightly. Wires must not be exposed, and the box covers must be closed. Don’t underestimate the threat of rodent-induced fires; reliable power supply is ensured. There are regulations regarding wire connections; fusion welding and wrapping are strictly prohibited. Screw knob for strain relief cap; single-strand aluminum wire should be used. The cross-sections of the wires must match, and there should be a smooth transition between copper and aluminum connections. The wiring inside the box is bundled, with excess connections inside the enclosure. Clean, tidy, and pollution-free; the protective covers are complete and labeled. The box flap should be grounded, and the PEN wires should be clearly separated. For single-phase sockets, prioritize safety: left for neutral, right for live, and top for ground wire. Below the three phases, a triangle is formed; the ground wire hole is larger on the top. After installing the light switch, ensure it is positioned neatly and aesthetically. For surface installation, proceed in sequence, with pre-inspection for each step. V. Inspection and acceptance: The openly installed pipelines need to be pre-inspected, and the inspection items cover 7 aspects. Variety specifications and elevation, fixed location, and appearance. Do not neglect the anti-corrosion treatment, including the pipes inside the ceiling. Pre-inspection is carried out as part of the process, and there are various aspects to the inspection. Power cord for the adapter, light switch, and cable. Both strong and weak power outlets should be available, along with cable trays and trays. The direction of the power outlet must be correct, and the equipment’s position cannot be off. All installation dimensions match, and the inspectors attached name tags. A summary should be made for each process, along with self-inspection and mutual inspection by the team. Quality assessment must be carried out simultaneously, and all required fields must be filled in. Guaranteed items must be guaranteed, while basic items should be sampled for inspection. The measured items need to be measured, with the percentage points indicated for each. Summarize in a timely manner for evaluation, and work together to overcome quality challenges. After passing the wires, test their insulation; record the results carefully without neglect. The equipment should have proper power and lighting facilities, with complete main and branch circuits. System lightning protection and shielding, working ground for anti-static purposes. All 4 types of grounding must be implemented, and schematic diagrams should be drawn for concealed inspection. After the installation is complete, run tests next. Self-controlled motors and heating, signal audio, and antennas. Fire control TV and phone, monitoring battery and power generation. After completing the comprehensive tests on a single unit, all operation test records must be complete. For high-rise buildings, do not forget to test under full load. The commissioning period is limited; refer to the regulations and specifications. After the installation and commissioning procedures are completed, the final quality assessment is signed. Finally, as-built drawings need to be prepared, and changes and discussions should be carefully reviewed. With careful planning and verification, achieving high-quality projects is not difficult.