What s the matter with the dimming of the electric pen when the electric switch is pushed, and it is

If the brightness of the pen dims after pushing the switch, it is likely that the power line is connected, and it is best to use a multimeter to measure whether the voltage is enough.

It may be that there is an oxidation virtual connection phenomenon in the input live wire, and most of the virtual connections are between the watt-hour meter and the switch, such as the crimping screw of the watt-hour meter, the crimping screw of the electric switch or the wire joint between the watt-hour meter and the switch, etc. Because the current is large or the screw is loose, the node will heat up and oxidize, resulting in virtual connection. The resistance is formed at the contact, so when the switch is disconnected, the pen light is on for open circuit measurement, and the pen light on the switch is not on because there is a large resistance in series on the live wire in the circuit.

In this case, it is likely that some of the resistors in its display panel are faulty, so this is the case.

If you can charge it with a different outlet, you can confirm that your charger is good. Otherwise there is a problem with the charger. The electric pen is only the live line of the test, which means that there is electricity, but if the zero line is not connected, the electric pen will also be bright, but the electrical appliances, that is, your charger, do not have a circuit, or it will not work.

So it doesn't work.

It is recommended that you turn off the electric switch at home and open the socket to see if there is a problem with the neutral line (marked N) or the socket is broken. Let's deal with the specific situation on a case-by-case basis. Not a big deal.

To explain that the voltage is now out of phase, that is, where the wires are in poor contact, you can check it.

If you noticeably feel the dimming of the brightness of the pen, then it can only be explained. The real store hasn't come over yet, it's just the induction store. We can try. Check that the contact of the electric switch is good.

The electric pen fire line can be bright but very dark, generally the fire wire has a broken circuit, can glow is virtual or inductive, it is recommended to disconnect the main gate to check forward, it is best to find a professional electrician, there is a certain safety risk in the operation.

I measured the plug with an electric pen and found that the live wire was very dark, which explained: 1. The live wire had poor contact; 2. The voltage is too low. So it doesn't work.

You close the gate, turn on a light, and test the wire with an electric pen to see if it's still on. Do not light up the line of fire to find the breakpoint.

This is normal. Because there is an electric current flowing through the small light, it will be on, and your hand will still touch the small light after you jump... But the resistance to ground will become larger, so it will be darkened...

There is a virtual connection at the incoming end of the live wire! There is a high line resistance! There is voltage due to no load when it is open to the rear circuit!

The glow voltage of the electric pen is only a few tens of volts! I can light it! Circuit loading after closing!

The circuit electrical appliance pulls down the voltage due to the zero line at one end! Can't start the pen again!

Check it from the wiring screw in front of the brake! Find the virtual junction of the line of fire! Just pick it up!

Turn off the energy-saving lamp of the switch and keep it.

There is a slight brightness, (electrode micro-milliwatt level), this phenomenon occurs, 1, is the switch misconnected zero line, although the zero line is turned off, but after the live wire into the lamp, through the remaining zero line segment and the ground distribution capacitance (two wires close to each other and insulated from each other to form a distributed capacitance), the formation of an AC circuit, high-sensitivity energy-saving lamp still has a faint light. 2. The principle of the situation is the same as above--- because after the switch is broken, because the fire wire and the live fire wire are worn together in a wire tube, which is also a distributed capacitance, the induced voltage of the live AC fire wire is conducted, and the highly sensitive energy-saving lamp will also emit a faint light, and the power consumption in this situation is minimal, so don't worry. **This phenomenon only avoids or shields the wire to distribute capacitance, 1 is to avoid the lamp line parallel too long or too close.

2. The lamp line uses shielded wire.

When the main switch is pulled down, the electric pen is turned on, and it is induction, and a desk lamp or other electrical appliances are plugged in to see if there is electricity.

Electricity: Your home appliances do not pass through the main gate; No: External wire induction makes the pen bright.

When the main gate falls, there is still electricity in the live wire, and the electric pen lights up.

There may also be static electricity.

Maybe there's something wrong with the bulb, or the phase wire is broken

Brake knife or relay protection switch? Is it closed when pushed up or closed when pulled down?

The line of fire is broken. Lack of firing. How to check by yourself in reality, there are many uncertain factors, and you need to have basic literacy (knowledge) of electricians. Only ideas can be provided here. Not electricians do not recommend moving.

It may not be that your knife switch is broken, or the fuse of the knife switch itself is broken or the upper fuse is broken.

It's not a problem with the switch, the electric pen can only look at the live wire and not the zero line, the zero line may be broken and short-circuited, check it.

Checking the electricity with an electric pen can only prove that the live wire is normal, and the fault of the zero line disconnection cannot be ruled out.

1) Generally, the electric brakes are double-pole. If it is a single knife and it is connected to the zero line, it will be like this. (Dangerous).

2) It may be that the electric switch often burns the fuse, and the insulation is not good. It is recommended to change the power switch.

3) There may be other short-circuit errors in the line.

I think it may be that the two wires connected at the electric gate did not pass through the electric switch. So the electric switch is useless at all, it should be the problem of the electric switch. You can take it apart and take a look.

There may be a bit of a problem with the electric pen, but I don't know what the problem is, so let's buy another one.