In order to dispel the idea that people want to insert two holes and three holes at the same time, the country has introduced a universal three hole socket (also known as universal hole and old national standard hole), which is compatible with both holes and three hole socket. However, after it was put into production, it was found that the neutral wire of three holes and two holes of the plug was used for * * *, and the rated current might be exceeded when it was used at the same time, which was a great safety hazard.
Therefore, on the premise of ensuring that dual-port three hole socket cannot be used at the same time, on February 30th, 2008, AQSIQ and the National Standardization Administration Committee revised the national standard of sockets again, and replaced the old national standard GB2099.3- 1997 with the new national standard GB2099.3-2008.
On June, 2065438, the new national standard was officially implemented in the production field. However, in consideration of inventory and other issues, a transition period of 1 was set, and it was stipulated that from June 20th11day, it was forbidden to sell old national standard sockets in the circulation basin.
In the extended data market, there are also five-hole sockets that are sold at a relatively long distance, but when buying, it must be noted that when two appliances are plugged into five holes at the same time, never plug in high-power appliances at the same time, and never exceed the rated current of the socket.
Don't say anything, the 86 mark is so big. At that time, the standard was set with the thinking of taking a drastic measure, but later I made a mistake and resolutely refused to change it. The previous three-hole plug is not the current size. In the past, few household appliances needed grounding protection, and few needed large current. The plug is very thin. On the one hand, the plug can be made smaller. On the other hand, for example, the washing machine can be unplugged after use, so the impact is not great.