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Anonymous users2024-02-121. Construction drawings before construction.
Before construction, there must be electrical (strong current, weak electricity), water supply and drainage design and construction drawings.
2. It is strictly forbidden to expose the wire.
It is strictly forbidden to lay the wires directly in the wall, in the floor, under the floor or on the ceiling without any protection.
3. The wiring conduit should be distinguished.
Lines with different voltages, different circuits, and different signals are strictly forbidden to wear in the same conduit.
4. The installation of lamps and lanterns should be carried out after the painting is completed.
Install lamps and lanterns on the brick-concrete structure, it is strictly forbidden to use wooden wedges, and use hooks, bolts or expansion bolts. There should be no less than 2 bolts (or screws) securing the fixture. Luminaires must not be installed on combustible components.
5. Switch installation of lamps and electrical equipment.
The switch of the lamp and electrical equipment must be installed on the "phase wire" (that is, the control phase wire), otherwise after the switch is off, the lamp will be turned off and the electrical equipment will still be live, which is easy to cause electric shock.
6. There are two protection methods for the power system.
Grounding protection and zero protection, China generally adopts the grounding protection method. Note that in the same system, it is strictly forbidden to take two protection methods at the same time, otherwise it will cause safety accidents.
7. It is forbidden to use the mobile switch at the head of the bed.
If the luminaire uses a screw head, the center reed tongue of the screw head should be connected to the control phase.
8. Protection at the interface.
The interface of each line should be smooth and the connecting plate connection should be firm. The interface box of the power supply inlet box should be protected by a protective ring (lock nut).
9. The arc of the elbow of the threading pipe.
For the renewal and maintenance of the conductor in the future, the curvature of the elbow at the turn of the conduit (i.e. the radius of the cold bending) of the conduit buried in the wall, underground or ceiling should be 5 10 times the diameter of the conduit.
10. It is forbidden to connect wires in the threading pipe.
It is forbidden to connect the wire in the conduit, that is, if the length of the wire is not enough to be connected, the joint of the wire cannot be in the conduit, and it should generally be wired in the junction box such as switches, sockets, and lamp head boxes.
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Anonymous users2024-02-11The positive electrode is connected to the positive electrode, and the negative electrode is connected to the negative electrode. If you think it's right, please give me a good review, thank you.
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Anonymous users2024-02-101. Pay attention to the utilization rate of wire pipe. In order to ensure that the cable can be pulled in the later maintenance and replacement, the utilization rate of the line in the line pipe must be controlled within 50%. If each wire pipe is very full, once there is a problem in the later use process, the wire will not be pulled out at all.
2. Pay attention to avoid opening the horizontal trunking next to it. In the process of circuit installation, it is necessary to avoid laughing at the horizontal groove on the wall, because if the horizontal groove is too long, it will pose a threat to the stability of the wall.
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Anonymous users2024-02-09Generally, there are two wires that come in, one live and one ground.
Electrical appliances need to be connected to these two wires in order to work, while the switch is to disconnect or connect one of the wires before using electrical appliances.
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Anonymous users2024-02-08The switch is connected to the live wire, and the plug-in plate is the left zero and the right fire.
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The question is too vague to be asked.