A spark is the flow of electric current in a medium of gases or air. It is formed in the gap between electrodes with different potentials. An example of powerful gas discharges is welding.
Household power outlets are connected to a 220-volt network and are live.
When the plug of an electrical appliance (electrical resistance) is inserted or removed into it, a current circuit is created or broken, including a section of air. Ohm’s law applies.
Such switching occurs quickly, but not instantly. When the contacts touch and open, they rattle (vibration) with the formation of a spark in the gaps.
Similarly, a welder works with an electrode. The difference is that:
- when welding, huge currents are specially created that melt the metal;
- and in everyday life, they are reduced to a minimum.
Wherein:
- the welding process is long;
- switching of sockets is short-term.
The faster the switching is completed and the air gap is eliminated, the less equipment can be damaged.
For example, a modern SF6 circuit breaker of a 330 kV network opens its contacts and breaks a load of more than 7000 amperes in 1 sine wave period (0.022 seconds). This is his standard for eliminating every accident when a short circuit occurs.
3 main tips to improve security:
eliminate current overload;
Switch electrical circuits as quickly and reliably as possible. To do this, it is best to hold the plug body with one hand, and the sockets with the other;
Always use the power regulator and the switch button for household appliances.
Why does the socket spark when we insert the plug?
Need to know: this point in time does not cause malfunctions as often as pulling the plug. Causes of the problem:
- loose fit of the plug pins to the contacts. The gap between them is created due to wear of the contact device or discrepancy between the standards and dimensions of the parts. For example, thin lamellas are pressed weakly;
- excess load of the connected consumer acting on the socket and wiring. When connecting electrical appliances you need to be more careful;
- poor quality cheap socket. Repair won’t help. It must be replaced – this is the main way out of a dangerous situation;
- The screws of the wiring connection terminals have been loosened. They just need to be pressed (tightened): to carry out repairs;
- An increased starting current occurs. Contacts can’t cope with him. The socket and plug get hot. Such electrical appliances must be connected via starters.
How to get rid of sparks in sockets: 7 brief conclusions
- Treat electrical appliances with care and use them wisely. Explain to all family members the basic rules that reduce the risk of fire:
- how to use sockets;
- what and where can be connected;
- why it is important to follow safety rules.
2. Install only plugs of appropriate standards into sockets.
3. Be sure to pay attention to the loads flowing through the contact connections.
4. If you need to use extension cords, consider the amount of power they are rated for.
5. Replace worn-out mechanisms of plugs and sockets on time.
6. Don’t save money on low-quality products.
