JB/T 2739-1996 Graphical symbols for electrical diagrams of industrial machinery

This standard specifies the graphic symbols for industrial machinery electrical diagrams. This standard applies to electrical drawings and other technical documents of industrial machinery such as metal cutting machine tools, woodworking machine tools, casting and forging machinery. JB/T 2739-1996 Graphic symbols for industrial machinery electrical diagrams JB/T2739-1996 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T2739—96
Graphical Symbols for Electrical Diagrams of Industrial Machinery
1996-04-22 Issued
Ministry of Machinery Industry of the People's Republic of China
1996-07-01 Implementation
JB/T2739—96
1 Subject Content and Scope of Application
2 Reference Standards
3 Terminology
4 Drawing of Symbols
5 Numbering of Symbols
6 Use of Symbols
7 Provisions for Computer-Assisted Drawing Systems for Symbols 8 Explanation of Symbols
Symbol Elements, Qualifying Symbols and Other Commonly Used Symbols Wires and Connectors Parts
Passive components
Semiconductor tubes, photosensitive, magnetically sensitive and digital symbol display devices Generation and conversion of electrical energy
Switches, control and protection devices
Measuring instruments, lights and signal devices
Block diagram symbols of control systems
Solenoid valves, electromagnetic clutches, electromagnetic chucks, electromagnetic speed regulation devices Binary logic units
Analog units
Graphic symbols for data processing systems and other devices Appendix A Graphic symbols for ladder diagrams (reference) 2
Machinery Industry Standard of the People's Republic of China
Graphic symbols for electrical diagrams of industrial machinery
1 Subject content and scope of application
This standard specifies the graphic symbols for electrical diagrams of industrial machinery. JB/T2739—96
Replaces JB273983
This standard applies to electrical drawings and other technical documents of industrial machinery such as metal cutting machine tools, woodworking machine tools, electrical processing machine tools, casting and forging machinery.
2 Reference standards
GB4728
JB/T2740
IEC617
3 Terminology
3.1 Graphic symbols
Graphic symbols for electrical drawings
Graphic symbols for drawing electrical diagrams, diagrams and tables of electrical equipment of industrial machinery
Graphics, marks and characters usually used in drawings or other documents to represent a device or concept. 3.2 Symbol elements
A simple graphic with a definite meaning must be combined with other graphics to form a complete symbol of a device or concept, for example: the symbol elements such as filament, grid, anode, tube shell, etc. constitute the symbol of an electron tube. When symbol elements are combined into a symbol, their arrangement may not be consistent with the actual structure of the device represented by the symbol. 3.3 General symbol
A usually simple symbol used to represent a type of product and the characteristics of such products. 3.4 Qualifying symbol
A symbol added to other symbols to provide additional information. Note: Qualifying symbols cannot usually be used alone, but general symbols can sometimes be used as qualifiers. For example: the general symbol of a capacitor added to a sensor constitutes a capacitive sensor.
3.5 Box symbol
A simple graphic symbol used to represent the combination of components, equipment, etc. and their functions, without giving the details of the components, equipment, or considering all connections.
Note: Box symbols are usually used in drawings using single-line representation, but can also be used in drawings that show all input and output connections. 3.6 Pre-adjustment
Establish initial conditions. For example: pre-determine the control value of a loop. 3.7 Fine adjustment
Fine adjustment of capacitors, inductors, and resistors. 4 Drawing of symbols
The graphic symbols in this standard can be directly used or drawn in proportion. Approved by the Ministry of Machinery Industry on April 22, 1996
Implementation on July 1, 1999
JB/T2739-96
When arranging symbols, the distance between connecting lines should be a multiple of the module (2.5mm), usually twice (5mm), so as to mark the terminal mark.
Generally, symbols can be used directly in drawings; in computer-aided drawing systems, symbols should be drawn on a grid (see Chapter 7). 5 Numbering of symbols
Each symbol in this standard is given a serial number. This serial number consists of three sections: a. The first section indicates the chapter of this standard; b. The second section indicates the article number of the chapter; c. The third section indicates the symbol number of the article. The three sections are separated by ",".
In each chapter of this standard, each article is numbered consecutively starting from 1. In each clause, the symbols are numbered consecutively from 1 to 99. The symbol "=" or " " is used below the second paragraph (i.e. clause) of the number. The former indicates equivalent to EC617, and the latter indicates a newly designed symbol in this revision. If these two signs are not present, it means that the symbol is a graphic symbol defined by GB4728 and the previous version of this standard, and this standard is still using it.
For example:
13 :2 :4
The 4th symbol
Clause 2
6 Use of symbols
Chapter 13
This standard draws the symbol elements, limiting symbols and general symbols as completely as possible, but only draws limited examples of combined symbols. If the symbols of certain specific devices or concepts are not specified in this standard, it is allowed to be derived through appropriate combinations of the specified symbols. In order to meet the requirements of different drawings or uses, the sizes of related symbols can be changed. For example, power transformers and measuring transformers often use symbols of different sizes.
The symbols in this standard may be enlarged or reduced as required. When a symbol is used to define another symbol, the symbol is often drawn in a reduced size. When the symbols are reduced or enlarged, the proportions between them and the symbols themselves should remain unchanged. The orientation of the symbols shown in this standard is not mandatory. Without changing the meaning of the symbol, the symbol can be rotated or mirrored as required for the layout of the drawing, but the text and the direction of indication shall not be inverted. Wire symbols can be represented by lines of different widths. For clarity, the symbols are usually shown with lotus lines. Unless otherwise specified, the symbols are only drawn in one form with connecting lines. Supplementary information can be added to most symbols, but examples are shown in this standard only when there is a recommended method for such information. Some symbols in this standard have several graphic forms, and the "preferred form" is preferred. Only one graphic form can be selected in the same electrical drawing, and the size of the graphic symbol and the thickness of the line should also be basically consistent. 7 Symbols are applicable to the provisions of the computer-aided drawing system. The symbols should be designed to be used in a grid with a specific module M; for example: the module M is 2.5 mm. The connecting lines of the symbols overlap with the grid lines and end at the intersection of the grid lines; b. The side length of the rectangle and the diameter of the circle should be designed to be multiples of 2M. For smaller symbols, 1.5M, 1M or 0.5M should be selected; d. There should be at least 2M between the two connecting lines to meet the internationally accepted minimum character height requirement of 2.5mm. 2
8 Explanation of symbols
JB/T2739-96
The graphic symbols specified in this standard are all shown in the normal state without voltage and external force. The text symbols, physical quantity symbols, etc. in the graphic symbols specified in this standard should be regarded as components of the graphic symbols, but these text physical quantity symbols, etc. are not included in the content specified in this standard. 9 Symbol elements, limiting symbols and other commonly used symbols 9.1 Symbol elements
Graphic symbols
Limiting symbols for types of current and voltage
Graphic symbols
2M 220/110V
3N--60Hz 380/220V
3N～50Hz/TN-S
Functional elements
Note: Fill in or add appropriate symbols or codes in the wheel symbol to indicate components, devices or functions.
Boundary line
Note: Components, devices, etc. used to indicate boundaries are physically, mechanically or functionally connected to each other. Shield (shield)
Note: The shield can be drawn in any convenient shape, such as
Note: The voltage value should be marked on the right side of the symbol, and the system type should be marked on the left side of the symbol.
Example: DC three-wire system with neutral line 220V (110V between the two conductors and the neutral line) 2M can be replaced by 2+M.
Note: The frequency or frequency range and the voltage value should be marked on the right side of the symbol, and the system type should be marked on the left side of the symbol. Example: AC three-phase with neutral line 50Hz, 380V (220V between neutral line and phase line) 3N can be replaced by 3+N. Example: AC, three-phase, 50Hz, system with a direct grounding point and the neutral line and protective conductor are completely separated. AC and DC
Direction of force or movement
Graphic symbols
JB/T2739-96
Neutral (neutral line)
Mid-line
The movable part of the symbol moves in this direction to give the required effect (see symbol 9.3.2 Example) Arrows can be used to indicate direction.
Arrows can also be used to indicate the direction of force or the direction of movement of the part replaced by the symbol. The effect caused by the movement can be described by symbols or words. No.
9.4 Direction of flow
Signal waveform
Graphic symbol
Graphic symbol
Graphic symbol
Straight line movement or force in the direction of the arrow
Bidirectional straight line movement or force
Example: When 3 moves from 1 to 2, the frequency increases. Regulation
Unidirectional rotation in the direction of the arrow (clockwise direction shown) Bidirectional rotation
Bidirectional rotation with restrictions in both directions
Unidirectional propagation of energy, signal (unidirectional transmission) Bidirectional propagation without simultaneous
Alternating transmission and reception
Positive pulse
Negative pulse
Mechanical control
Graphic symbol
Graphic symbol
JB/T2739-96
Positive step function
Negative step function
Sawtooth wave
Mechanical connection
Pneumatic connection
Hydraulic connection
Example: Mechanical connection with indication of the direction of rotation. Note: The arrow should be regarded as rotating inward from the front of the connection symbol. i
9.7 Grounding, connecting to the chassis and equipotentiality
Graphic symbols
Automatic reset
Note: The triangle points to the return direction.
Non-automatic reset
Device that maintains a given position
Out of position
Entering position
Mechanical interlock between two devices
General symbol for grounding
Note: If the condition or function of grounding is not obvious, additional explanation can be given.
Noise-free grounding (anti-interference grounding)
Protective grounding
Note: This symbol can be used instead of 9.7.1 to indicate a protective function.
Example: Grounding to prevent electric shock in case of fault 5
Form 1
Form 2
Wires and connecting devices
10.1 Wires
Graphic symbols
Graphic symbols
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connected to the chassis or the bottom plate
Equipotential
General symbols for wires, wire groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of wires, if the number of wires needs to be shown, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to represent it.
Example: Three wires.
Example: Three wires.
More situations can be indicated as follows:
Indicate above the horizontal line: type of current, distribution system, frequency and voltage, etc.
Indicate below the horizontal line: number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be indicated by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note of 10.1.9.
Twisted wire (two strands are shown)
Note: Note of 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element4Direction of flow
Signal waveform
Graphic symbol
Graphic symbol
Graphic symbol
Straight line motion or force in the direction of the arrow
Bidirectional straight line motion or force
Example: When 3 moves from 1 to 2, the frequency increases. Regulation
Unidirectional rotation in the direction of the arrow (clockwise direction shown) Bidirectional rotation
Bidirectional rotation with restrictions in both directions
Unidirectional propagation of energy, signal (unidirectional transmission) Bidirectional propagation without simultaneous
Alternating transmission and reception
Positive pulse
Negative pulse
Mechanical control
Graphic symbol
Graphic symbol
JB/T2739-96
Positive step function
Negative step function
Sawtooth wave
Mechanical connection
Pneumatic connection
Hydraulic connection
Example: Mechanical connection with indication of the direction of rotation. Note: The arrow should be regarded as rotating inward from the front of the connection symbol. i
9.7 Grounding, connecting to the chassis and equipotentiality
Graphic symbols
Automatic reset
Note: The triangle points to the return direction.
Non-automatic reset
Device that maintains a given position
Out of position
Entering position
Mechanical interlock between two devices
General symbol for grounding
Note: If the condition or function of grounding is not obvious, additional explanation can be given.
Noise-free grounding (anti-interference grounding)
Protective grounding
Note: This symbol can be used instead of 9.7.1 to indicate a protective function.
Example: Grounding to prevent electric shock in case of fault 5
Form 1
Form 2
Wires and connecting devices
10.1 Wires
Graphic symbols
Graphic symbols
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connected to the chassis or the bottom plate
Equipotential
General symbols for wires, wire groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of wires, if the number of wires needs to be shown, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to represent it.
Example: Three wires.
Example: Three wires.
More situations can be indicated as follows:
Indicate above the horizontal line: type of current, distribution system, frequency and voltage, etc.
Indicate below the horizontal line: number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be indicated by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note of 10.1.9.
Twisted wire (two strands are shown)
Note: Note of 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element4Direction of flow
Signal waveform
Graphic symbol
Graphic symbol
Graphic symbol
Straight line motion or force in the direction of the arrow
Bidirectional straight line motion or force
Example: When 3 moves from 1 to 2, the frequency increases. Regulation
Unidirectional rotation in the direction of the arrow (clockwise direction shown) Bidirectional rotation
Bidirectional rotation with restrictions in both directions
Unidirectional propagation of energy, signal (unidirectional transmission) Bidirectional propagation without simultaneous
Alternating transmission and reception
Positive pulse
Negative pulse
Mechanical control
Graphic symbol
Graphic symbol
JB/T2739-96
Positive step function
Negative step function
Sawtooth wave
Mechanical connection
Pneumatic connection
Hydraulic connection
Example: Mechanical connection with indication of the direction of rotation. Note: The arrow should be regarded as rotating inward from the front of the connection symbol. i
9.7 Grounding, connecting to the chassis and equipotentiality
Graphic symbols
Automatic reset
Note: The triangle points to the return direction.
Non-automatic reset
Device that maintains a given position
Out of position
Entering position
Mechanical interlock between two devices
General symbol for grounding
Note: If the condition or function of grounding is not obvious, additional explanation can be given.
Noise-free grounding (anti-interference grounding)
Protective grounding
Note: This symbol can be used instead of 9.7.1 to indicate a protective function.
Example: Grounding to prevent electric shock in case of fault 5
Form 1
Form 2
Wires and connecting devices
10.1 Wires
Graphic symbols
Graphic symbols
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connected to the chassis or the bottom plate
Equipotential
General symbols for wires, wire groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of wires, if the number of wires needs to be shown, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to represent it.
Example: Three wires.
Example: Three wires.
More situations can be indicated as follows:
Indicate above the horizontal line: type of current, distribution system, frequency and voltage, etc.
Indicate below the horizontal line: number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be indicated by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note of 10.1.9.
Twisted wire (two strands are shown)
Note: Note of 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element7 Write
in the appropriate position of the symbol. If it is a steel pipe, you can write "WM" in
, and if it is a plastic pipe, write "WP". 2 The size of the model can be marked after the letter code. Example: 3/4 metal pipe WM3/4°
3 The n in the symbol represents the number of wires or cables. Wire tie
Note: n is the number of wires.
General symbols of resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: It can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect position Heating element7 Write
in the appropriate position of the symbol. If it is a steel pipe, you can write "WM" in
, and if it is a plastic pipe, write "WP". 2 The size of the model can be marked after the letter code. Example: 3/4 metal pipe WM3/4°
3 The n in the symbol represents the number of wires or cables. Wire tie
Note: n is the number of wires.
General symbols of resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: It can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect position Heating element7 Write
in the appropriate position of the symbol. If it is a steel pipe, you can write "WM" in
, and if it is a plastic pipe, write "WP". 2 The size of the model can be marked after the letter code. Example: 3/4 metal pipe WM3/4°
3 The n in the symbol represents the number of wires or cables. Wire tie
Note: n is the number of wires.
General symbols of resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: It can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect position Heating element7 Write
in the appropriate position of the symbol. If it is a steel pipe, you can write "WM" in
, and if it is a plastic pipe, write "WP". 2 The size of the model can be marked after the letter code. Example: 3/4 metal pipe WM3/4°
3 The n in the symbol represents the number of wires or cables. Wire tie
Note: n is the number of wires.
General symbols of resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: It can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect position Heating element7 Grounding, connecting to the chassis and equipotential
Graphic symbols
Automatic reset
Note: The triangle points to the return direction.
Non-automatic reset
Device that maintains a given position
Out of position
Enter position
Mechanical interlock between two devices
General symbol for grounding
Note: If the condition or function of the grounding is not obvious, additional explanation can be given.
Noise-free grounding (anti-interference grounding)
Protective grounding
Note: This symbol can be used instead of 9.7.1 to indicate a protective function.
Example: Grounding to prevent electric shock in case of fault 5
Form 1
Form 2
Wires and connecting devices
10.1 Wires
Graphic symbols
Graphic symbols
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connected to the chassis or the bottom plate
Equipotential
General symbols for wires, wire groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of wires, if the number of wires needs to be shown, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to represent it.
Example: Three wires.
Example: Three wires.
More situations can be indicated as follows:
Indicate above the horizontal line: type of current, distribution system, frequency and voltage, etc.
Indicate below the horizontal line: number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be indicated by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note of 10.1.9.
Twisted wire (two strands are shown)
Note: Note of 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element7 Grounding, connecting to the chassis and equipotential
Graphic symbols
Automatic reset
Note: The triangle points to the return direction.
Non-automatic reset
Device that maintains a given position
Out of position
Enter position
Mechanical interlock between two devices
General symbol for grounding
Note: If the condition or function of the grounding is not obvious, additional explanation can be given.
Noise-free grounding (anti-interference grounding)
Protective grounding
Note: This symbol can be used instead of 9.7.1 to indicate a protective function.
Example: Grounding to prevent electric shock in case of fault 5
Form 1
Form 2
Wires and connecting devices
10.1 Wires
Graphic symbols
Graphic symbols
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connected to the chassis or the bottom plate
Equipotential
General symbols for wires, wire groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of wires, if the number of wires needs to be shown, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to represent it.
Example: Three wires.
Example: Three wires.
More situations can be indicated as follows:
Indicate above the horizontal line: type of current, distribution system, frequency and voltage, etc.
Indicate below the horizontal line: number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be indicated by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note of 10.1.9.
Twisted wire (two strands are shown)
Note: Note of 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96bzxZ.net
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element1 conductor
Graphic symbol
Graphic symbol
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connect to the chassis or the bottom plate
Equipotential
General symbol for conductors, conductor groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of conductors, if the number of conductors needs to be indicated, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to indicate it.
Example: Three conductors.
Example: Three conductors.
More situations can be indicated in the following ways:
Indicate the type of current, distribution system, frequency, and voltage above the horizontal line.
Indicate below the horizontal line: the number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be represented by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: Three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note in 10.1.9.
Twisted wire (two strands shown)
Note: Note in 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element1 conductor
Graphic symbol
Graphic symbol
2X120mm A
3N-- HOIIxSRDV
#X120+1×
JB/T2739—96
Connect to the chassis or the bottom plate
Equipotential
General symbol for conductors, conductor groups, wires, cables, circuits, and busbars
Note: When a single line is used to represent a group of conductors, if the number of conductors needs to be indicated, the corresponding number of short slashes can be added or a short slash plus a number can be drawn to indicate it.
Example: three conductors.
Example: three conductors.
More situations can be indicated in the following ways:
Indicate the type of current, distribution system, frequency, and voltage above the horizontal line.
Indicate below the horizontal line: the number of conductors in the circuit multiplied by the cross-sectional area of ​​each conductor. If the cross-sectional areas of the conductors are different, they should be separated by a plus sign. The conductor material can be represented by the symbol of the chemical element. Example: DC circuit 110V, two aluminum conductors, the cross-sectional area of ​​the conductor is 120mm.
Example: Three-phase AC circuit, 50H380V, three conductors, the cross-sectional area is 120mm, and the cross-sectional area of ​​the neutral conductor is 50mm.
Alternate representation of single and double wires
Shielded wire
Note: Same as the note in 10.1.9.
Twisted wire (two strands shown)
Note: Note in 101.9.
10. 1. 11
10. 1. 12
Form 1
Form 2
Form 1
Form 2
Graphic symbols
10.2 Connection of terminals and conductors
10. 2. 10
Graphic symbols
JB/T2739-96
Conductors in cables (three strands shown)
Form 1 is the preferred type
Note: Several conductors form a cable (either twisted together or in a shield) but the lines representing them in the diagram are not close to each other, and the method of 10.1.11 can be used to represent them. Example: Two of the five conductors pointed to by the arrows are in a cable.
Multi-line representation of shielded cable (three wires are shown)Single-line representation of shielded cable (three wires are shown)Said
Connection of wires
Note: Circles can be painted as round black dots if necessary, m
Terminal board (terminal board with wire end markings is shown)Connection of wires
Multi-line connection of wires
Example: Cross connection (dot) of wiresSingle-line representation, detachable terminal
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation.
10.3 Connectors
Graphic symbols
Graphic symbols
JB/T2739—96
Common connection of a group of similar connectors
Note: The total number of similar connectors is noted near the common connection symbol. Example: Multiplexed single-stroke selector (10 contacts).
Socket (female) or one pole of the socket Plug (male) or one pole of the plug Multi-pole plug and socket (shown with 6 poles) Multi-line representation
Single-line representation
Fixed part of the connector
Note: This symbol is used only when it is necessary to distinguish the fixed part from the movable part of the connector.
Moving part of the connector
Note: Same as the note of 10.35.
Mating connector
1Same as the note of 10.3.5.
2Connector wiring diagram, you can draw its diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element5.
2 Connector wiring diagram, you can draw a diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel pipe, and "WP" if it is a plastic pipe. 2 The size of the model can be marked after the letter code. Example: 3/4 metal tube WM3/4°
3The n in the symbol indicates the number of wires or cablesWire tie
Note: n is the number of wires.
General symbol for resistors
Variable resistor
Adjustable resistor
Varistor
Variator
Note: U can be replaced by V
Thermistor
Note: can be replaced by t
Fuse resistor
Sliding wire varistor
Resistor with sliding contact and disconnect positionHeating element5.
2 Connector wiring diagram, you can draw a diagram according to the specific shape of the connector (circle, rectangle, square, triangle, etc.), write the connecting wire number in the small circle, and write the terminal number on the terminal. Or use a wiring table to list the terminal number and the corresponding wire number.
Example: Wiring diagram of matching connector
Note: The number in the small circle is the wire number, and the number above the circle is the corresponding terminal number.
10.4 Cable accessories
Graphic symbols
Graphic symbols
JB/T2739-96
Connected connecting piece
Disconnected connecting piece
Plug and socket connector (such as U-shaped connection) Plug-to-plug
Plug-to-socket
Socket with undervoltage and overcurrent protection Description
Cable straight-through junction box (shown with three wires) Multi-line representation (preferred shape)
Single-line representation
Cable junction box, cable junction box (showing three wires T-shaped connection)
Multi-line representation (preferred shape)
Single-line representation
Hoses used for cables (wiring harnesses)
1Hoses can be drawn in curved or straight shapes. 2If necessary, the number of wires can be marked at the appropriate position. 3 Codes and models can be marked above or in appropriate positions of symbols. Example: Φ30 metal hose WMΦ30Φ30 plastic hose WP30: Φ30 plastic-coated metal hose WPM30
Metal pipe joints used for cable (wiring harness) pipe threading Note: Models or sizes can be marked above or in appropriate positions. 9
Form 1
Form 2
Passive components
11.1 Resistors
Graphic symbols
Graphic symbols
JB/T2739-96
Steel pipes or plastic hard pipes used for cable (wiring harness) laying Note
10.4.7 Write
"WM" in the appropriate position of the symbol if it is a steel
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