Lightning protection methods for household appliances

The main reason why the lightning season affects the safety of household appliances is due to the intrusion of inductive lightning. Induction lightning refers to the lightning electromagnetic pulse generated on various metal pipes and lines entering the building when lightning occurs. For a family, there are four main ways for inductive lightning intrusion: power supply line, telephone line, cable TV or wireless TV feeder, and the outer wall or column of the house. The first three ways are all directly connected with the external lines of household appliances. When these lines enter the house overhead, the harm is more serious.

So, how can we ensure the safety of household appliances and users? The technical specifications and experience of lightning protection tell us that first of all, buildings should be equipped with direct lightning protection facilities, such as lightning rods, down conductors and grounding bodies, according to the lightning protection design specifications. They can lead most of the lightning current into underground discharge. Secondly, the power line, telephone line and TV signal line introduced into the house should be shielded and grounded, so that part of the lightning current will leak into the ground.

In the past, many people proposed not to use household appliances in thunderstorms, such as unplugging the power plug and antenna plug of the TV, and not making phone calls in thunderstorms. Of course, this is safer, but sometimes it is inconvenient. For example, when someone calls, do they answer or not? Refrigerators and air conditioners cannot be used when the power is turned off. What if there is no one at home when it thunders? Therefore, it is suggested that the above lightning protection methods should be adopted. Of course, when the current conditions are not mature, unplugging all the plugs can also be regarded as an emergency measure.