What s going on with the air switch sparking

Two reasons: 1. The wiring of the switch is not tightly connected, the contact is not good, and there are arc burns.

2. The current in the circuit is too large, the air is overheated, and the air is heated inside.

Other common failures:

Tripping: First determine the tripped air switch.

It is a distribution box at home.

The main switch in is also a shunt outgoing switch.

If the main switch is not tripped, but the shunt switch trips, it means that there is a problem with the wiring of the power supply line of the high-power electrical appliance, that is, a plurality of high-power electrical appliances are connected to the same shunt switch.

If the shunt switch does not trip and the main switch trips, calculate whether the sum of the power of household appliances exceeds the approved capacity of power supply, and check whether the total switch capacity matches the approved capacity of power supply. If the sum of the power of household appliances exceeds the approved capacity of power supply, reduce the number of household appliances used at the same time (especially high-power household appliances) and apply to the power supply company for capacity increase;

If the sum of the power of household appliances does not exceed the approved capacity of power supply, but the total switching capacity is less than the approved capacity of power supply, the main switch that matches the approved capacity of power supply shall be replaced. At the same time, it should be reminded that the starting current of some high-power electrical appliances is large, and the impact of the starting current should be considered when calculating the power.

If it is the internal ignition of the switch, it is the poor contact of electric shock, if it is the terminal ignition, it is the contact is virtual, and the crimping screw should be tightened again, if the brake is opened and closed, it is a normal phenomenon, but the 10A switch with 2000W electrical appliances is a bit small, and it should be replaced with 20A, and the current product is marked with 10A, but if it is really with 10A, it is not possible, at least choose to have a 50% surplus.

There are two reasons for the general air switch: one is the poor contact of the switch wire. Caused by ignition.

The second is that the electricity consumption exceeds the load of the wires. The line is aging and overheating. Prevention of electrical fire accidents:

When installing electrical equipment, the quality must be guaranteed and the requirements for safety and fire protection should be met. To use qualified electrical equipment, damaged switches, lamp heads and damaged wires can not be used, wire joints should be firmly connected according to the prescribed connection method, and wrapped with insulating tape. Tighten the screws on the wiring of the terminal pile head and terminal to prevent poor contact caused by loose wiring.

After the electrician installs the equipment, it does not mean that it can be done once and for all, the user in the process of use, such as finding that the wiring of the lamp head and socket is loose (especially the wiring of the mobile electrical plug is easy to loose), poor contact or overheating, to find an electrician to deal with it in time.

There are several main reasons:

1. The terminal of the air switch is not in good contact with the wire, which is the main reason for the switch to burn out, for example, the wire is not pressed well, the screws are not tightened, etc., it is easy to burn out the switch.

2. The wire is too thin. The capacity of the air switch is relatively large, and the wire is relatively thin, the wire cannot withstand the normal load current, and the wire is overheated, causing the switch to burn out.

3. The air switch breaks the short-circuit current, which causes the contact to burn out, and the contact is not good when it is usually used, and the heat is easy to burn out the switch.

4. The quality of the air switch is not good, mainly because the air switch may be a fake and shoddy product, the quality is not good, and it is easy to be damaged when in use.

5. The air switch protection failed, and it should have tripped normally, but it did not trip, resulting in excessive current and burning out the switch.

Unlike other electrical components, the air switch itself is a protection element that provides protection against overcurrent. It has two types of protection – overload protection and short-circuit protection. We are used to saying this, but in fact short circuits are also a type of overload, and the reason why they are separated is because the air opening provides protection for the two in different ways.

Overload protection is the use of the deformation of the heat-sensitive metal sheet inside the empty opening, which is a process of heat accumulation, and the deformation of the metal sheet takes time. The short-circuit protection uses the large current in the circuit during the short circuit to generate a strong magnetic field, and pulls the spring to trip instantaneously when the air is opened.

Air switch. The basic function is to prevent overload, when the total power of the electrical appliances connected below the air switch is too large, and the current in the line reaches the protective current of the air switch, it will trip, so as to protect the safety of the home circuit.

It is a safety protection element in itself, which is to protect the safety of other electrical appliances, and its fire must be related to itself.

1. The rated current of the air switch.

Less than the maximum operating current in the circuit.

2. The internal structure of the air switch is damaged, and at critical times, it cannot exercise the trip protection function and damage itself.

3. Check the home circuit, there may be a cause of short circuit, and the air switch is damaged or cannot trip.

Prolonged overload.

Aging. The crimping terminal is loose.

There is a spark on the inlet wire of the air switch, which is caused by loose wiring.

The air switch will not trip if it is connected to the void, and it will burn the air switch terminal after a long time. The most vulnerable part of the air switch is generally the virtual connection of the terminal block, which leads to the increase of contact resistance and heating.

Burnt out the terminals.

As long as the rated current of the air switch is selected appropriately and the wiring is firm and reliable, it will not be broken under normal conditions.

The wiring is not secure. Have the electrician remove it and reconnect it.