Which wire will not be electrocuted first in the energized light circuit?

No matter which wire you cut, you will be electrocuted, because after you touch this wire, you will turn on this circuit, and it is best to turn off the power switch.

It's three lines of defense! It can guarantee us from the danger of electric shock. But many people don't know very well:

1.Direct contact with shock protection.

2.Ground and equipotential bonding.

3.Residual current action protector.

Let's start with the first line of defense: direct contact shock protection.

The name sounds lofty, but in fact, the principle is clear: the measures to prevent everyone from coming into contact with live bodies are all direct contact electric shock protection. The sheath of a wire, the panel of a socket, and the shell of a household appliance all fall into this category.

It may not seem technical at all, but this is precisely the most important protection. Electric shock, if you can't touch it, there will be no electricity (of course, if someone takes the step voltage or something to lift the bar, I can't help it, I just want to ask who has a direct 10 thousand volt high-voltage line at home). Direct contact protection against electric shock is the most basic and the most commonly used protection, and the other lines of defense are additional remedies and insurance measures after the failure of this line of defense.

For ordinary people, how to hold the first line of defense, there are a few suggestions:

When you find that the outer skin of the wire or plug of the electrical appliance is damaged or the shell is broken, please stop using it and repair or replace it in time;

The switch is connected to the live wire, and there is still power at one end of the live wire at the switch position, which cannot be avoided. But the advantage is that as long as the switch is turned off, there will be no more power from the neutral side of the switch to the position of the bulb, so that when the bulb is damaged or the lamp holder needs to be replaced, there is no power, which is safer.

On the other hand, if the switch is connected to the neutral side, whether you turn off the switch or not, there is always a wire near the bulb that is electrified, and it is very unsafe to do anything you do. The only way to do this is to pull the main brake completely. After comparison, is it relatively safer for the switch to be connected to the live wire?

I have to drive on the left, isn't it the same way that cars can walk? In fact, this is quite true, even if you follow the rule of driving on the right, it is impossible to avoid all accidents, and even if you deliberately drive on the left, it may not necessarily cause accidents. But which method of driving is safer?

Go without saying.

Live wire or neutral wire, only touch one of them, no electric shock. But in special cases: if it comes into contact with the line of fire, the foot touches the ground, which will also form a circuit, resulting in electric shock.

In the case of power-on, if we want to cut the wires then first. The wire must be cut off to ensure that there is no electric shock. Because when I cut the zero line. There is no problem with the power cord connected to the neutral wire. And on the other side of the disconnection, there is electricity.

If you cut the wires of the energized lamp circuit first, it should not appear, because there is one inside. With switch control, you can turn the power off.

The energized lamp circuit is cut off first, and a wire will not be electrocuted, so that the current is cut off. There will be no danger, and there will be no possibility of electricity.

Ordinary people spend a lot of time at home, and if you want to ensure that the whole family is not electrocuted, you must remember the three lines......It's three lines of defense! It can guarantee us from the danger of electric shock. But many people don't know very well:

1.Direct contact with shock protection.

2.Ground and equipotential bonding.

3.Residual current action protector.

As long as the circuit is cut, any wire light will go out.

It must have been cut off first.,There's no silence on the parts.,I hit the fire and now there's no current on it.。

This depends on what you cut yourself, what kind of wire is this, under normal circumstances, if you blow the wire of the motherboard, you can basically power on, resulting in the machine can not be used.

If the circuit is cut off, it probably won't appear.

Which one will not appear when the energized light circuit is cut off first, this should be cut off first, and this should not be the reaction that will appear, this should be safer.

Wait for the fat to be cut off first, I think it should be safer not to be electrocuted, but you still have to pay attention to this knowledge.

This should be to cut a black, thin, very thin wire, I feel that it should not be electrocuted, it should be like this.

The switch is cut off the live wire The situation you said should be when the switch is turned on Otherwise it will not be normal Use a voltage tester to measure the light that turns on the switch Both sides of the switch are live wires There is voltage The lamp head is a live wire with voltage The other is the neutral line There is no voltage Normal household appliances are connected in parallel on the live wire and the neutral line.

The switch to control the lighting lamp should be connected to the phase wire with electricity, the lamp holder will be out of power after the switch is turned off, if the switch is connected to the zero line, the switch is turned off and directly connected to the phase wire of the lamp holder is not turned off and the lamp holder is still electric, and the other wire of the lamp holder is turned off because the switch is turned off, and the electric wire comes through the lamp because there is no circuit resistance to the ground, so it will be electrified, so it is not standardized, it is very dangerous.

It means that the position of the light wire connecting to the neutral line has been disconnected, which may be bitten off by a mouse.

The switch must cut off the live phase wire, and then connect to the lamp head, and the neutral line is directly connected to the lamp head without voltage.

[Two wires of 220V are used as loops to each other.] 】

If a 220V wire is broken, it will not produce a loop. 】

The two wires of 220V, one of which is connected to the ground wire under the transformer, so there is no voltage to the ground and it is called the [neutral wire].

The other 220 volt wire is directly drawn from the transformer, so there is a voltage of 220 volts to the ground, which is called [live wire].

When the 220 volt bulb is working, the current is flowed back to the neutral line by the fire through the bulb and then stops flowing. Then it flows back to the fire line through the light bulb--- repeats 50 times in 1 second, and the power goes out 100 times in the middle, so 220 volts is called [alternating current], and the current flows through the light bulb in the direction of exchange between the live wire and the zero line. The neutral line and the live wire take turns [forming a loop with each other].

Because the neutral line is pre-grounded, there is no voltage for people on the ground (commonly known as uncharged, in fact, for the working circuit, the live wire and the neutral line are equally electric), and people call the neutral line a loop for convenience.

Why does a circuit arise when a wire is broken?' It means that there is electricity at the end of the live wire of the bulb, and the live wire is directly connected to the transformer, so of course there is electricity.

If the broken wire is the zero line of the bulb, the end of the bulb of the broken wire is connected to the live wire through the bulb, and it must also be electrified, and the filament of the bulb is also a conductor, and the filament does not have any isolation effect on the live wire. If the human body contacts the broken end of the bulb at this time, the live wire current must pass through the filament conductor, flow into the earth through the human body, and then flow back to the transformer through the ground wire of the transformer.

The expression of "loop" is not clear, so you should be asking this meaning, right?

How can a power line be maintained if a wire is broken behind the power supply line? This is not possible unless the circuit can continue to work until the wire is disconnected.

It must be broken off the zero line, because there is equipment on the line to generate a loop, and the neon bubbles are bright when tested with a voltage tester, and if the equipment is removed, the loop will not be lit.

If one of the 220-volt wires is broken, there will be no circuit, and the circuit will be formed by waiting for the appliance to be used and the other wire. It seems that you still have to learn the basics of electricity to understand all this.

That is the zero line is broken, and the fire wire and the ground can also form a loop.

Hello: If the neutral wire is broken, the live wire can be generated by the electrical appliance, and the live wire is broken, and there is no such problem: thank you.

1. In layman's terms, the DC circuit is a current path formed by connecting from the positive pole of the power supply voltage to the negative pole of the power supply through the load (which can be composed of bulbs, resistors and other electrical appliances).

2. There can be many circuits in a circuit, and each circuit can also be subdivided into small circuits.

Circuit: .A path in which current flows through a device or other medium back to the power supply. Usually refers to a closed circuit.

Is there one loop for each set of lines? For example, there is a light wire, a socket, an electrical appliance, and then each group needs a neutral wire return box

Usually the neutral line can be shared.

2 switches control 1 light will not be wired, teach you a trick, no need to hire an electrician, easily connect the wires yourself.

This is the standard connection method for lighting electrical circuits, i.e. live wire incoming.

Switch, neutral wire into the lampholder (connected to the threaded lampholder), connecting the lampholder and the switch.

If you turn on a switch arbitrarily, you can make.

The bulb glows, then let the two switches be connected in parallel.

If you want to turn on both switches at the same time to make the bulb glow, the two switches should be connected in series.

The line connection is as follows:

1. The dual-control switch is different from the ordinary single-control switch, it is composed of three connection points, which are one access point and two connection points.

2. The principle of the dual control switch is easy to understand. It is to control the on/off of the circuit through two switches connected in series, so as to realize the control of the electric light.

3. When wiring the dual control switch, first connect the wire between the two switches, that is, connect the yellow line in the figure.

5. Connect the other end of the live wire to an electric lamp, and connect the output end of the electric lamp to the neutral wire.

6. In this way, the dual control switch is connected, and you can use these two switches to control the same light.

With two single-pole double-throw switches, the live wire is connected to the moving contact of switch A, and its two static contacts are connected to the two static contacts of switch B respectively, and the moving contact of switch B is connected to the bulb to form a loop.

There is a fixed text format for opening a social security payment certificate, and the name of the unit, the number of the social security registration certificate and the organization are provided according to the above format, and the start and end time of the payment that needs to be issued, etc., and then the unit will first seal it, and then take it to the social security center to seal it.

The two switches must be dual-controlled! There are 3 terminals in one switch! The terminal letter is generally LL1L2, and the L1 of the two switches is connected to L1

L2 is connected to L2L, and one is connected to the live wire.

One is connected to the light. The other one of the lamps is connected to the zero wire n

The live wire is connected to the left side of the ** (both switches are connected), and the two wires on the right side of the two switches are the switch wires, one end of the lamp is connected, and the other end of the lamp is connected to the zero wire.

It must be a dual-control switch, which requires three wires and three contact points, and the upper and lower contact points of the two switches are connected, one end of the middle is connected to the live wire, and the other end is connected to the control wire, it's as simple as that.

Then connect it in parallel, it's not that difficult, let's take a look.

First of all, the switch needs to be a two-way switch, two switches and three wires.

If it is connected in series, any one can be controlled, and if it is connected in parallel, it will not be lit if it is disconnected.

According to the wiring diagram, the first floor can not be opened, the second floor cannot be closed, and the second floor can not be closed.

The above is the connection method of two switches to control one lamp.

You still have to ask an electrician to pick up the duplex lights.

How to wire two switches for one bulb.

There are only lights and switches on a wire in the circuit diagram, which will not light up and cannot be used. A single wire cannot form a circuit, and even if electricity is applied, the current cannot flow.