【 Weak current College 】 power plug socket and fire-Power By 【 China power house network 】

According to fire accident statistics indicate that as a result of electrical reasons caused by fire, a significant part of the fire is due to the often use power plug socket manufacture quality offensive, wiring polarity dislocation, swap operation failures, and other reasons. 17 November 1997, Kashgar City Industrial Trade Center building fire, 15 people were killed, 21 wounded, direct property losses of $ 4 million, the fire cause with Plug and socket. To this end, for frequently used power plug socket fire prevention must be given sufficient attention.
The so-called, refers to the power plug to connect low-voltage electrical equipment, low voltage electrical equipment and household appliances of insulated wire ends of the power plug devices; the so-called power outlet, refers to the connection of voltage 380 v and below power fixtures. Electrical plugs and sockets of the edge of the insulating material as bakelite, plastic and ceramics, the conductive material, copper or iron plated parts. Power plugs into single phase, three phase and non plug.
Power plug socket fire safety measures
1, power plugs and Sockets, parameters, specifications, conductive, insulation, technical conditions, in the manufacture and use should be consistent with national standards GB1002-80, GB1003-80, GB2099-80. Inflammable, explosive, high temperature and high humidity areas prohibit the use of standard plug socket. Application of special plug and socket, should strictly implement the explosion hazardous areas electrical safety regulations.
2. rated current 10A, 15A, 25A, 40A, its Sockets each wire line core should be respectively section area: 1.0-2.5, 1.5-4.0, 2.5-6.0, 4.0-8.0 mm2 rated current for 6A, 10A, 15A, 25A, 40A, its plug each wire line core should be respectively section area: 0.5-1.0, 0.75-15, 1.0-2.5, 1.5-4.0, 2.5-5.0 mm square.
3. Plug and socket should be inspected before use its appearance: insulated surface should have good luster, no bubbles, cracks, lack materials, swelling, visible distortion, abrasions and burrs and other defects. Conductive metal surfaces must be smooth and Burr-free and corrosion traces. Ferrous metal pieces should be corrosion-resistant protective layer, screw connections and riveting Department shall loose or automatically loose phenomenon. In the plug and socket shell and wire insulation is not complete if it is damaged or exposed electrical parts, you should immediately find electrical repaired. Single-phase three-level 10, 15, plugs and three-phase four-pole plug of the line appliances within the proper pressure to ensure safety. Plug Outlet pass to rated current, its conductive parts and ground segment of temperature should not exceed 45 ° c. Plugs and Sockets can withstand the frequency of 50 Hertz AC voltage withstand test duration of one minute without breakdown flashover phenomenon. Nollrewirable plug in rated current, each bolt and immediately plug pin voltage drop between not more than 10 MV.
4, the plug and socket wiring installations should be safe and reliable, plug should be reliable connected to minimum and maximum leads a needle, socket connection should be reliable conductor smallest respectively a root and maximum conductor for two. Bolts should be straight and strong with insulating ontological installed, use the procedure under 1.2 times the entire plug pull-out strength of maximum pulling force, bolts should not be isolated with insulators. Fixed mounting bolt should be normal, the deflection angle shall not be greater than 3 degrees. Use the plug and socket should periodically cleaning maintenance and shaking table measuring the insulation resistance.
5, three-pole outlets with single phase, on the left side of the grounding electrode, should mark the centerline of the symbol "N", the plug pins marking should be set with its matching plug. Close to the ground or ground socket shell, should mark the ground symbol. Single-phase power supply with three eye socket, 3-phase power supply four eye socket. In the face of the outlet, one of the larger hole to "protect" the zero line (neutral grounding grid) or "protecting Earth wire" (neutral network). Single-phase power left a zero line received the "work", "received the right pole line." Should pay particular attention to the "protection protective earth wire" or "zero", and "the continuity of the work received zero line" to separate the connection with the above line, strictly forbidden socket "zeroing" in working with Earth wire threaded; prevent "work zero line" once loose, using power equipment shell live, or when the "work" received zero line and the line connected backwards, you also use electric equipment metal shell live, so in the event of personal electric shock or fire.
6. to prevent electrical equipment and wiring for electrical insulation damage caused by fire, should be installed when leakage currents over scheduled value can emit sound and light signal alarm or automatically cut off the power of the protector. However, to prevent electrical fire and the installation of a leakage protection, residual current relays or alarm devices, and at the end of the protection should form a line protection. Hand-held motor-operated electric tools, mobile appliances, household outlet circuit of the device should be preferred ·soaking out no more than 50 Ma fast movements of the protector. Once the action after the protector should pull the power plug, identify the cause of the failure of transmission shall not be forced.