What s a little square in the electric switch in my house?

The small black square on the side of the switch is used to indicate leakage.

Because once the leakage, the small black square will pop out of the surface, then the gate handle will not close and power off, indicating that you have a hidden danger of leakage, only after eliminating the hidden danger of leakage, and then press the small black square, the gate handle can be pushed up and locked. If the small black square pops up and trips, it means that there is a leakage of electrical appliances, if it trips but the small black square does not pop up, it may be that the current is too large, the load is too large, or there is a faulty electrical appliance or something.

You can press it back directly, there is no danger, and this is a normal operation. If you don't press it back, you won't be able to send power.

The switch installed in your home is a leakage switch, which will only protrude when it leaks, and the function is to cut off the power protection to protect people and equipment.

That is the indication of leakage tripping, when leakage, the switch trips and the button will come out, in this case, generally check whether there is a leakage in your home's wiring, especially in wet places such as bathrooms, bathrooms and kitchens, generally look at the tripping switch tube where the electricity is, go to where to check, when closing, you must first twist the button back, or not let it close.

That's the test button for the leakage protection switch.

If there is a leakage, the block button will pop up and the power will be cut off to protect everyone's safety.

Press back to close the brake, there is no danger.

Summary. Extended information: Electric switch refers to a relatively large power switch, leakage protection switch, also known as a switch.

It is a switching device mainly used to isolate the power supply, reverse gate operation, to connect and cut off the small current circuit, and has no arc extinguishing function. When the switch is in the position, there is an insulation distance between the contacts that meet the specified requirements and an obvious disconnection mark, and when the position is closed, it can carry the current under normal circuit conditions and the current under abnormal conditions within the specified time. <>

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The small square inside the switch was pressed down.

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The small square in the electric switch was pressed down by the brigade: it is exposed to electric protection, and after solving the short circuit point, you can push it up, press it, let the small square jump out and press it again, as long as it is not leaking, push it a few more times. <>

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Extension of the front mold exhibition information: electric switch refers to a relatively large power switch, ridge leakage protection switch, also known as the switch. It is a kind of device that is mainly used to isolate the power supply, reverse the operation, to connect and cut off the small current circuit, and has no arc extinguishing function.

When the switch is in the position, there is an insulation distance between the contacts that meet the specified requirements and an obvious disconnection mark, and when the position is closed, it can carry the current under normal circuit conditions and the current under abnormal conditions within the specified time. <>

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That is a leakage prompt, and if there is an electrical leakage, that button will pop up.

If it trips, the small square pops up, it means that there is electrical leakage, if it does not pop up, it means that the current is too large, it may be that the load is too large or there is a faulty electrical appliance.

Once the leakage, the small black square will protrude from the surface, and then the gate handle cannot be closed, in order to remind you that there is a leakage, first eliminate the hidden danger of leakage and then connect the small black square, so that the gate handle can be pushed up and locked.

That little square is for installation testing