Home electrical installation standards

Nowadays, people are keen on the decoration of their homes, with tiles, ceilings, circuits, and dark lines. The operators of construction and decoration are not lacking in migrant workers, especially the splattered warriors on the street. Little is known about the electrical installation standards in Beijing. The vast majority of customers do not understand one or two of them. In this way, when equipment is assembled on the ground, it is unavoidable to leave behind hidden dangers. If it causes fire, it will cause huge loss of life and property.
According to the "Electrical Engineering Installation Standards" of Beijing, the technical parameters in suitable houses are as follows:

Wire selection

In general, an aluminum wire of 10 mm2 or less can be calculated by passing 5 times the amount of current. For example, one square millimeter of aluminum wire can pass about 5 amps of current. It is worth noting that since the wires are buried underground through pipes and the room temperature often exceeds 25°C during the summer, they should be discounted by 72%, and the safety estimate is about 3.5 amps. The sum of the wattage of the electrical appliances cannot be exceeded. 800 watts. When the copper wire is selected, the problem of loss and loss may not be considered, but copper and aluminum wire cannot be mixed, and it is better to use qualified copper wire in one step. Use three kinds of plastic sheathed copper conductors with different color covers during construction to distinguish the live line, neutral line, and grounding protection line. Do not use one or two colors of wires to complete the entire project.

Socket installation

(1) The surface mounted socket shall not be less than 1.8 meters from the ground.
(2) The concealed socket is not less than 0.3 meters above the ground. To prevent children from getting an electric shock, touching with a finger, or inserting a metal object into the power hole, be sure to use a safety socket with a safety cover.
(3) The construction wiring requirements for single-phase two-eye sockets are: "left-zero-right-fire" when the holes are horizontally arranged and "zero under fire" when they are arranged vertically.
(4) The wiring requirements for the single-phase three-eye socket are: the top grounding hole must be firmly connected with the grounding wire, connected, and connected, and must not be disconnected. The remaining two holes are connected according to the rules of “Left, Zero, Right Fire”. It is worth noting that the neutral line and the protective ground wire must not be connected or connected as one.
(5) The refrigerator should use an independent, protective grounded 3-eye socket. It is forbidden to connect the grounding line to the gas pipeline to avoid serious fire accidents.
(6) In order to ensure the absolute safety of the family, sockets for range hoods must also use three-eye sockets. The protection of grounding holes must not be taken lightly.
(7) The bathroom is often used to take a shower and it is easy to get wet. It is not advisable to install an ordinary socket.

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