**Safety Knowledge for Home Electricity Use**
1. **Why should the light switch be connected to the live wire?**
If a light switch is installed on the neutral line, the lamp may appear off when turned off, but the live wire remains energized. This can create a dangerous situation where people might touch the lamp and get electrocuted. To avoid this, all switches must be connected in series with the live wire to ensure that the circuit is completely broken when the switch is off.
2. **How to correctly install a single-phase three-hole socket?**
For safety, especially with portable devices, it's important to use three-pin plugs and sockets that include a dedicated ground pin. Connecting the ground pin directly to the neutral line is unsafe, as it could lead to electric shock if the power supply is reversed or the neutral line breaks. Instead, the ground pin should be connected to a proper grounding system to protect against electrical faults.
3. **Why are plastic-insulated wires not allowed to be buried directly in walls?**
Over time, plastic insulation can degrade, leading to reduced insulation levels. If the wall becomes wet, this can cause leakage and pose a risk of electric shock. Additionally, direct burial makes it difficult to inspect and maintain the wiring, increasing the chances of unnoticed damage.
4. **What is the purpose of a residual current device (RCD)?**
An RCD, also known as a leakage protector, helps prevent electric shocks and fires by cutting off the power supply when it detects a leakage. It protects against both direct and indirect contact, and ensures that any fault is quickly addressed before it leads to serious consequences.
5. **What are the main causes of electric shocks?**
Common causes include lack of electrical knowledge, improper handling of equipment, faulty installations, and damaged wiring. People often touch live wires without realizing the danger, especially during repairs or while using outdated appliances.
6. **What should you do if someone is electrocuted?**
First, make sure you are safe, then turn off the power source immediately. Check the person’s breathing and perform CPR if necessary. If another person is present, they should call emergency services and prepare first aid tools. Time is critical—every second counts in saving a life.
7. **What are the basic safety measures for home electricity use?**
Always use certified appliances, avoid using wet hands near electrical devices, never replace fuses with copper wires, and ensure proper grounding. Regularly check for damaged wiring and keep your environment free from flammable materials near electrical equipment.
8. **How to prevent household appliances from burning?**
Install over-voltage protection devices and avoid leaving appliances unattended for long periods. Ensure that the voltage supplied matches the appliance’s requirements and regularly inspect wiring for signs of wear or overheating.
9. **How to choose the right fuse for your home?**
The fuse rating should be 1.2 to 1.5 times the capacity of the circuit. Never use copper or iron wires instead of fuses, and always replace them properly with the correct size and type.
10. **What are the requirements for an RCD?**
An effective RCD should have high sensitivity, typically tripping within 0.1 seconds, and include monitoring features to ensure continuous protection. It should also be compatible with the electrical system and installed correctly.
11. **How to prevent electrical fires and what to do if one occurs?**
Use quality equipment, secure all connections, and avoid placing flammable items near electrical components. If a fire starts, cut off the power first and use non-conductive extinguishing agents like sand or dry powder. Never use water or foam on electrical fires.
12. **Essential home electrical safety tips:**
Keep necessary tools like screwdrivers and testers handy. Ensure all meters have proper protection and never bypass safety mechanisms. Always follow manufacturer instructions, check insulation, and avoid overloading circuits. Proper installation and regular maintenance are key to preventing accidents.
By following these guidelines, you can significantly reduce the risk of electric shocks, fires, and other electrical hazards in your home. Stay informed, stay safe, and always prioritize electrical safety in daily life.
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