Electrical fire generally refers to the thermal energy released due to the failure of electrical lines, electrical equipment, appliances and power supply and distribution equipment; such as high temperature, arc, electric spark and non failure energy released; so how to prevent electrical line fire?
How to prevent electric circuit fire?
Many houses in our country were designed before the 1990s, and the capacity of general electrical lines is only 0.5 to 2 kilowatts, which is difficult to meet the current demand of residential power consumption. Not to mention that in the future, high-power electrical appliances will enter the family, even the air conditioners and microwave ovens are difficult to use. Many residents have such experience. In hot summer, tripping phenomenon is significantly increased compared with other seasons. Even in some areas, the use of air conditioners is limited due to the Limited capacity of electrical lines. The installed air conditioners can only be used for decoration. Generally, the lower the capacity of the electrical circuit, the smaller the cross-section of the wire, and the smaller the indoor branch circuit, generally 1 to 2. In this way, the line will be overloaded for a long time, and the insulation performance will be reduced, resulting in short circuit and fire. In addition, there are also residential fires because the number of sockets is too small, the user has to pull the temporary wires randomly, and a large number of single-layer insulated twisted wire terminal blocks are used. This kind of wire has no sheath, which is easy to damage the insulation due to extrusion damage, and because there is no grounding wire, the connected household appliances cannot be grounded. In addition, 40% of the terminal blocks are products that do not meet the standards (according to the data released by the State Bureau of technical supervision), which are connected The contact pressure and contact area are insufficient, and the terminal block with a slightly larger load current will generate abnormal high temperature and arc due to poor contact. Therefore, it is not uncommon for people to get electric shock and fire accidents in the residential buildings by randomly pulling temporary wires and using a large number of wiring boards.
In fact, in order to improve the quality of residential construction and ensure the safety of residential electricity, the state and local governments have formulated a series of regulations on residential electricity. For example, the newly issued “national residential design code” clearly stipulates that: the electrical circuit should be laid in a way that meets the requirements of safety and fire protection, the wire should be copper wire, and the cross-section of each residential incoming line should not be less than 10 Square mm, the cross section of branch circuit wire shall not be less than 2.5 square mm; “the air conditioning power socket, power socket and lighting of each house shall be designed in different ways; the kitchen power socket and toilet power socket shall be set with independent circuit”; the toilet shall be set with partial equipotential bonding “, etc. In particular, the code is still the minimum requirement in residential electrical design, and all kinds of new houses will be constructed in accordance with the code.
As the saying goes, “fire and water are merciless.”. Every year a large number of residential electrical line fires have caused great economic losses and casualties to urban residents. According to the statistics of fire causes of residential buildings in China, about 30% of the fires are caused by the aging of residential electrical lines or unreasonable configuration, ranking first in many fire causes. It is expected that in the next ten years, due to the widespread use of air conditioners, electric water heaters and electric cookers, the residential electricity consumption will also increase rapidly. Obviously, the existing residential electrical line configuration level in China is far from meeting the demand of future electricity consumption, electrical fire hazards are very prominent, and the proportion of electrical fire will continue to increase. Here, we sincerely remind Guangzhou real estate developers that in order to eliminate the hidden dangers of electrical fires, we must build distribution standards that meet the national requirements. At the same time, in the process of selling houses and speaking houses, we should also “talk about electricity” so that consumers can understand the power distribution situation of the houses purchased. As consumers in the purchase of new houses, we must also consult with developers about the configuration of electrical circuits. We might as well take the configuration of electrical circuits as a standard for choosing new houses.
Baibai safety net reminds us that many small hidden dangers are often ignored for a long time and eventually become “hidden killers”. Therefore, when using electrical equipment, we must be careful and keep away from fire hazards. The common sense of children’s home electric shock prevention is still in the process of updating, please continue to pay attention to this website!