Is the ground wire and the live wire connected in parallel in a lighting circuit?

Not in parallel!

The characteristics of parallel circuits are: there is a common power supply, and a wire is drawn out at both ends of the branch to connect to the electrical appliances, and the parallel or semi-parallel state is realized with other circuits.

However, our ground wire is actually another system, which we call the grounding system. The function of grounding is that if there is a leakage, we can introduce the current into the earth through grounding, one is to facilitate the leakage protection action and protect the circuit. The first is to prevent the leaked electricity from hitting people and to protect people.

Therefore, the two systems are independent, and the two circuits are only switched on in case of leakage. So, not a parallel circuit!

Are you talking about the relationship between the neutral and the live wire in a lighting circuit?

In the lighting circuit, the neutral wire and the live wire cannot be directly connected together, otherwise it will be short-circuited. There must be a load between the neutral line and the live wire for normal operation.

Take a look at the following circuit example:

In fact, this is a kind of protection measures during maintenance, which is what we often say in our mouths to hang mustard or earth protection, the main function is to prevent the circuit maintenance is caused by someone misclosing the electric shock accident. The principle of action of the ground wire and the live wire together.

Many people should have encountered such a thing, that is, when the live wire and the ground wire are connected together, it will be ignited, or hear a bang, this situation is actually a short circuit situation, if the switch in the circuit is bad at this time, the current may flow through the earth, this is because the grounding resistance at this time is far less than the human body resistance, which can avoid the current to threaten our lives. The live wire and the ground wire are together, it is the use of such a principle, so as to play a protective role, to avoid accidents when people are not closed, even if the switch is broken, the gate is closed, the current will also be introduced to the earth through the wire, so that our lives can get a safety guarantee.

These are two separate wires, there is no such thing as parallel or series, only electrical appliances are divided into parallel or series.

It's two wires, not in parallel.

Of course, it can't be moved, and the general lighting circuit has no ground wire, only neutral wire and live wire.

Don't understand what you mean? After reading your question text organization and expression skills, I am a little worried that the problem you expressed is different from the actual situation. So, can't get you right. Please describe the problem clearly.

Summary. In general, there is no need for a grounding wire.

In general, there is no need for a grounding wire.

According to the requirements of the "Code for Acceptance of Construction Quality of Building Electrical Engineering" GB50303 2002, that is, only the installation height of the electric rock differential gas lighting circuit is required to lead out of the ground wire. In practice, this common practice no longer meets the requirements of the current norms. The latest "Architectural Lighting Design Standard" GB50034 2004 has clear provisions on the grounding protection of lamps and lanterns.

When using Class I luminaires, the exposed conductive part of the luminaire should be reliably grounded. A safety isolation transformer should be used for safe ultra-low voltage power supply, and its secondary side should not be protected and grounded. Whether the lighting circuit of the jujube cover needs to lead out the grounding wire, it should be classified according to the anti-electric shock of the selected lamps and lanterns, as well as the contact protection mode between the electrical systems.

Hope it helps, dear.

Yes. Lighting fixtures need to be installed with ground wires.

When the lamp is grounded to the laughing line, if the lamp or lamp holder has leakage, the leakage current will lead to the leakage current to the grounding bar in the distribution box through the ground wire;

Then it is led from the ground to the ground, because the grounding resistance is much smaller than the resistance of the human body, so as to avoid the electric shock hazard that may be caused by the leakage current flowing through the human body;

Yes. Lighting fixtures need to be installed with ground wires.

When the lamp is grounded, if the lamp or lamp holder has leakage, the leakage current will lead to the leakage current to the grounding bar in the distribution box through the ground wire;

Then it is led from the grounding row to the earth, because the grounding resistance is far less than the resistance of the human body, which avoids the electric shock hazard that may be caused by the leakage current flowing through the human body;

The grounding wire is a wire that directly connects to the earth, which can also be called a safety route, and when it is dangerous, it directly transfers the high voltage to the earth, which is a lifeline.

Summary. 1) Single-open wiring method: while connecting the ground wire of the lamp, you can observe whether the line between the lamp and the switch is two, one of which is the live wire and the other is the neutral line, and it only needs to be installed on the two vacant positions on the switch.

2) color-changing lamp wiring method: can observe whether the line between the lamp and the switch is three, and the switch is connected to the main power supply at the same time can be connected to the three wires on the controller on the three holes, and they correspond to three different colors, generally according to the gradual effect of the color of the lamp, from top to bottom respectively, inserted into the hole.

Pro-ruler spike! Lighting fixtures in the home need to be grounded. The connection of the grounding wire is to avoid the direct impact of the current and the human body after the occurrence of leakage.

In the process of using the lamp, if a leakage event occurs, the leakage current will pass through the previously connected ground wire and lead the leakage current to the grounding equipment in the distribution box.

<> is not a height requirement, higher than how much do not need to be grounded.

Wait a minute, dear.

1) Single-open wiring method: while connecting the ground wire of the lamp, you can observe whether the line between the lamp and the switch is two, one of which is the live wire and the other is the neutral line, and it only needs to be installed on the two vacant positions on the switch. (2) Wiring method of color-changing lamp:

It can be observed whether the line between the lamp and the switch is three, and the switch is connected to the main power supply of the calendar at the same time, the three wires can be connected to the three holes on the controller, and they correspond to three different colors, generally according to the gradient effect of the color of the lamp, from the top to the bottom of the mountain Song are installed, and the comma Zheng can be inserted into the hole.

3) Multi-wire control connection method: If the tremor is connected to the switch by the method of multi-wire control, it needs to be routed separately. The main lamp can be routed separately, and the downlight fixture and other lamps can be routed separately.

When connected to the switch controller, the switch can be set to a keypad type multi-switch switch, and the line connected to each switch hole is only for one of the lamps.

Hello:——1,The neutral point of the secondary of the low-voltage power transformer is grounded, so between the live and ground wiresThe voltage is 220V。Theoretically, it is only theoretically possible to connect the lights.

2. Due to the relatively complete installation of power supply equipmentThe power supply line with the leakage protection switch cannot be connected to the lamp by the live wire or ground wire: the leakage protection switch will trip

3. From a safety point of viewThere are great hidden dangers in this way of using electricityOnce the zero wire connecting the lamp and the ground electrode are loose or broken, the ground wire will be electrified; Once the lamp port of the light bulb is short-circuited, the protection neutral line of the power supply line will generate a high voltage (called counterattack voltage in the industry), so that all the equipment that protects the zero connection will be electrifiedSo the regulations prescribeIt is strictly forbidden to use the power supply method of "one fire, one place".

Theoretically speaking, the voltage between the live wire and the ground wire of 220V voltage can be lit, but whether from the regulations or safety, such connection is not allowed, the ground wire is connected to the shell of electrical equipment, there is no current at ordinary times, if the ground wire is connected to the lamp, the shell of the electrical equipment will be electrified.

Yes, the lamp is a resistive load and can be connected to 220V.

Yes. Lighting fixtures need to be installed with ground wires.

When the lamp is grounded, if the lamp or lamp holder has a leakage return answer, the leakage current at this time will lead the leakage current to the grounding bar in the distribution box through the ground wire;

Then it is led from the ground to the ground, because the grounding resistance is much smaller than the resistance of the human body, so as to avoid the electric shock hazard that may be caused by the leakage current flowing through the human body;

The lamp requires grounding, and its essence is that the PE wire must be reliably connected with the special grounding post of the metal shell of the lamp when wiring to avoid electric shock.

It is best to have a ground wire, which is more reliable and safe, if you are an ordinary resident, there is no ground wire for general lighting, and the lamps and lanterns selected above the industry generally have a ground wire.

Ordinary photos do not require a grounding wire.

If the 220-volt lighting needs to be a neutral wire and a live wireThat is, two lines of dao

The ground wire refers to the plate.

Electrical appliances have the right to induce electricity. Electrostatics. Leakage of electricity.

Put the induction electricity. Electrostatics. The leaky part is grounded in time.

Because of the induction electricity on the electrical device. Electrostatics. Leakage electricity is transmitted to the ground through the ground wire.

If you touch the electrical appliance again, you will not feel electrocuted. Isopressed.

380-volt lighting fixtures have grounding wires.

Yes, du

Lighting fixtures need to be installed with ground wires.

When the lamp is grounded, if the lamp or lamp DAO seat has a leakage return answer, the leakage current at this time will cause the leakage current to the grounding bar in the distribution box through the ground wire;

Then it is led from the ground to the ground, because the grounding resistance is much smaller than the resistance of the human body, so as to avoid the electric shock hazard that may be caused by the leakage current flowing through the human body;

The characteristics of the lamp itself, the installation position is relatively high, the human body can not be directly contacted, many lamps and lanterns have a slight leakage, these two characteristics also lead to the lighting circuit in the circuit rarely installed leakage protection switch;

If the lamp leaks current, and there is neither a ground wire nor a leakage protection switch in the circuit at this time, then the leakage current will inevitably flow through the human body, and the result may cause electric shock hazards to the human body.

If your question is changed to whether the lighting is self-defined to be protected against electric shock, then the answer is yes.

If the question is whether all lighting has to be grounded, the answer is no.

The state has requirements for anti-electric shock protection measures for lamps and other electrical appliances, and there are three classifications of protective measures, which are called Class 1 (safety grounding class (double insulation class (safety ultra-low voltage), usually home decoration or tooling lighting, connected to 220V or 380V standing lighting equipment, that is, to be grounded, that is, to use Class 1 lamps, because this measure is simple and easy, the effect is good, and it is not easy to take other anti-electric shock measures. There is more than one measure to prevent electric shock, such as flashlights and car lights, but there is no problem, because these products either have a very low voltage or good insulation protection against leakage. Lamps that do not have any measures to prevent electric shock are called Class 0 lamps, and their production and sale are now prohibited.

Theoretically, it is necessary to connect, but most of them are lighting zero lines, after returning to the transformer, grounding at the transformer, it is not necessary for the user to consider, but when the three-phase five-wire system is used on the construction site, it is to be considered.

Lighting does not use grounding wires, except for special lamps, such as when the metal chassis needs to be well grounded.

Construction Quality Acceptance Specification for Building Electrical Engineering (GB50303-2002), "Electrical Installation Engineering.

Low-voltage electrical construction and acceptance specifications" and other standards, there is no requirement that lighting must be grounded;

In the standard, the wiring method and position of the two lighting wires are required, such as: in the standard of "Code for Construction and Acceptance of Low-voltage Electrical Appliances in Electrical Installation Engineering", it is stipulated that the phase wire should be connected to the terminal of the center contact, and the neutral wire should be connected to the terminal of the thread.

The connection between the ground wire and the live wire of the street lamp will make the collapsed mold branch street lamp circuit form a closed loop, and the current code gap can flow from the power source through the live wire to the street lamp, and then return to the power source from the street lamp through the ground wire, so that the street lamp can work normally. In addition, the ground wire can also play a role in protecting the safety of the group, when the street lamp leaks, the ground wire can direct the current to the ground to avoid the risk of electric shock.