How are the three lines connected under the miner's connectin
measure the three connection points on the jack. The other two are short circuited and one is separate. This one alone is grounded
the other two need to be plugged in and tested with a multimeter. We use 1 for the one connected with the plug, and 2 for the one not connected with the plug
look at the three wires on the other side: if the multimeter is not used, the ground wire is connected to the ground wire, which is connected to the ground wire of the socket. The other two wires, one to the speaker, are connected to Jack 2. The other line is the power amplifier output line, connected to Jack 1
to determine the wire to the horn (or the terminal connected to the horn), the same can be measured with a multimeter. Of course, a lot of visual inspection is OK
The three wires are live wire, zero wire and ground wire
zero line: generally, power transmission is in the form of three-phase four wire, the three heads of three-phase electricity are called phase line, and the three tails of three-phase electricity are connected together and called neutral line, also known as & quot; Zero line;. The reason why it is called zero line is that there is no current passing through the neutral line at the time of three-phase balance, and then it is directly or indirectly connected to the earth, and the voltage with the earth is close to zero
live wire: there is 220 voltage between three phase wires and zero wire of three-phase electricity, which can cause electric shock to people, commonly known as & quot; Fire line & quot;. In Electrotechnics, the alternating voltage connected to the mains line is 220 volts (V for short, the symbol is v), and a wire is a live wire
ground wire: generally, the ground wire is connected to the earth, and there is no leakage
connection method: in the two holes, the left hole is connected with the zero line, and the right hole is connected with the live line. In the three hole socket, the upper hole is connected with the ground wire, the left hole is the zero line, and the right hole is the live line
precautions for grounding wire:
1. Before hanging the grounding wire, it is necessary to check the electricity. Hanging the grounding wire is a common Habitual Violation Behavior in the grass-roots, and the grounding wire can not contact the body when hanging
It is forbidden to use other metal wires instead of grounding wires3. The grounding wire is double-sided, which has the function of safety. Improper use will also proce destructive effect, so the grounding wire should be removed in time after the work. Closing the switch with grounding wire will damage the electrical equipment and the stability of the power grid, which will lead to serious electrical accidents
When driving the grounding pile, it is necessary to dial the ground to dredge the accident current quickly and ensure the grounding qualityAccording to your pictures, they are: red wire to fuse, blue wire to change and green wire to ground
the plug-in panel is a kind of socket, which is a multi hole socket formed by putting multiple sockets together. In short, the terminal block socket is a movable multi hole socket with power cord and plug, which is a common name of power converter
the terminal block socket can be used for many purposes, saving space and lines, simple and practical, and is a necessity of life
three hole socket: "zero on the left and fire on the right" (the ground wire is generally connected with the metal plate buried underground) is shown in the figure. Three wire plug: electrical appliances with metal shell are basically three wire plug, corresponding to three hole socket. The function of grounding: the middle plug of the three wire plug is connected with the metal shell of the appliance. When the three hole socket is inserted, the metal shell is connected with the earth<
extended data :
socket, also known as power socket and switch socket. Socket refers to one or more circuit wiring can be inserted into the seat, through it can insert all kinds of wiring
this makes it easy to connect with other circuits. Through the connection and disconnection between the circuit and copper parts, the connection and disconnection of this part of the circuit can be achieved
The two wires can be connected completely. Connect the zero wire in the lower left corner and the live wire in the lower right corner
bull socket wiring method:
1. Live wire connected to l terminal
extended information:
precautions when using three hole socket:
1. Make clear the number of sockets: the more sockets you install in your home, the better. You should choose the corresponding number according to the actual needs. If the socket installation is too much, it is a waste of resources, too little installation, there will always be a variety of inadequate situations at home
Determine the specifications of the socket: the three hole socket can be divided into 10a and 16A specifications. 10A is suitable for inserting all kinds of electrical appliances less than 2000W, while 16A is suitable for inserting electrical appliances more than 2000W. Before installation, the model of three hole socket can be selected according to the power of the applianceThree switches control a lamp, that is, on the basis of double control, a double pole double throw switch is added between the connecting lines of two switches, which can also be replaced by double switch
the live wire of power supply is divided into three wires, which are respectively connected to three switches of lighting. The three bare wires of each switch are connected to one end of the lamp, and then a wire from the other end of the switch is connected to the zero line of power supply
this kind of wiring is single connection and 3-control. First, understand that three switches are single open. This kind of single open requires three connecting posts, and the power live wire is connected in the middle of the first switch
use two double switches to control the connection method of one lamp, then disconnect the two double wires between the two switches, and connect them all with a double pole double connection switch, so that the original two wires can return to conction or cross to conction through his on and off, and then the connection circuit of one lamp can be controlled by three switches
extended data:
stair lighting three control switch control circuit:
stair lighting circuit has single control, double control and three control. A single control device has a switch to control a lamp, a sound (light) control switch to control a lamp and a timer to control one or more lamps; Dual control is mainly used to control a lamp, with two single chain al control switches and three connection modes; Three control is the use of two single control switch and a double control switch, three control a lamp
this kind of timer is widely used, and the slightly expanded control can be used for other electrical equipment, such as the time of water intake in waterworks, the time of water intake in small pumps provided by units and families, etc
working principle: every day at 17-21 o'clock, the internal contact of the timer is connected at 17 o'clock, so that the AC contactor coil is energized, the main contact is closed, and the water supply motor works; At 21 o'clock, the internal contact of the timer is disconnected, the coil of AC contactor loses pressure, the main contact is disconnected, and the water supply motor stops running. The timer can be set to work many times a day and supply water automatically in the morning, noon and evening
two switches in stairwell control one lamp (al control):
the al control of stairwell can turn on and off the same lamp downstairs and upstairs. The utility model has the advantages of lighting lamps when entering the stairs, and can be directly placed upstairs after going up the stairs, as well as when going down the stairs. Moreover, the lighting lamps are not controlled by time and environment, and are convenient and practical
this control method is also suitable for lighting when the door of the room is opened and turning off the lights in the room after entering the room. There are three connection modes to realize double control
The two wires are respectively connected to the live wire (red wire) and the zero wire (blue wire) of the plug row
as shown in the figure: Generally speaking, all the plug rows and sockets are equipped with red (live wire), blue (zero wire) and yellow green (ground wire) three terminals. Grounding wire plays a great role in ensuring the safety of use. It is recommended to borrow a grounding wire from another location
material development:
wire refers to the wire that transmits electric energy. It is divided into bare wire, electromagnetic wire and insulated wire. Bare wire has no insulating layer, including copper, aluminum flat wire, overhead stranded wire and various profiles (such as profile wire, bus bar, copper bar, aluminum bar, etc.). It is mainly used for outdoor overhead and indoor bus bar and switch box. Electromagnetic wire is an insulated wire which generates magnetic field or inces current in magnetic field after being electrified. It is mainly used for motor and transformer winding and other related electromagnetic equipment. The conctor is mainly copper wire, which should have thin insulation layer and good electrical and mechanical properties, as well as heat resistance, moisture resistance, solvent resistance and other properties. Different insulation materials can obtain different characteristics
material source: Internet
L ground wire, n ground wire, and a ground wire marked PE or E (ground protection wire)
the three-phase socket panel hole position is 4 holes (connected with 3-phase live wire and 1 zero wire), and the power supply voltage is generally 380V AC (most of the AC electrical equipment in instry), which is a device to provide convenient power supply for it
single phase socket is a single AC electromotive force in AC power line, which generally has two connectors when external power supply. The voltage of single-phase socket is 220 v
extended data:
the power socket shall be the proct that has passed the inspection by the relevant national proct quality supervision department. Generally, medium and high-grade procts with flame retardant materials should be used instead of low-grade and fake procts; The safe socket should be used in the house, and the splash proof socket should be used in the bathroom and other wet places
the rated current of power socket should be 1.25 times higher than the rated current of known equipment. The rated current of general single-phase power socket is 10a, and that of special power socket is 16A. The distribution circuit and power connection mode of special high-power household appliances should be selected according to the actual capacity; For the convenience of insertion, an 86mm × For 86mm unit panel, the best number of combined sockets is two, and the maximum number (including switches) is no more than three. Otherwise, 146 panel multi hole socket is used