JB/T 10296—2001 This standard is one of the greenhouse series standards. This series of standards includes: - Greenhouse structure design load - Greenhouse ventilation and cooling design specifications - Facility agriculture terminology - Multi-span greenhouse structure - Solar greenhouse structure - Temperature curtain cooling device - Greenhouse heating system design specifications - Greenhouse electrical wiring design specifications - Greenhouse control system design specifications The first two of the above standards are national standards, and the rest are industry standards. This standard specifies the safety requirements for greenhouse electrical wiring, the selection, layout and connection of wires and cables. This standard is applicable to the electrical wiring design in various greenhouses (livestock and poultry breeding facilities can refer to it). This standard was first issued in June 2001. JB/T 10296-2001 Greenhouse electrical wiring design specifications JB/T10296-2001 Standard download decompression password: www.bzxz.net

ICS65.040.30
Machinery Industry Standard of the People's Republic of China
JB/T10296-2001
Design regulation on greenhouse electrical wiring
Design regulation on greenhouse electrical wiring2001-06-22Released
China Machinery Industry Federation
2001-10-01Implementation
JB/T10296—2001
This standard is one of the greenhouse series standards formulated for the first time. This series of standards includes: 1. Greenhouse structure design load
2. Greenhouse ventilation and cooling design specifications
3. Greenhouse engineering terminology
4. Multi-span greenhouse structure
5. Sunlight greenhouse structure
6. Wet curtain cooling device
7. Greenhouse heating system design specifications
8. Greenhouse electrical wiring design specifications
9. Greenhouse control system design specifications
Among the above standards, the first two are national standards, and the rest are industry standards. This standard is a newly formulated industry standard.
This standard is proposed and managed by the National Agricultural Machinery Standardization Technical Committee. The drafting units of this standard are: China Agricultural Mechanization Science Research Institute, Yangling Qinchuan Water-saving Irrigation Equipment Engineering Co., Ltd. The drafters of this standard are: Liu Shumin, Zhang Minqiang, Yang Zhaowen. This standard was first issued in June 2001.
1 Scope
Standard of the Machinery Industry of the People's Republic of China
Design Regulation on Greenhouse Dectrical Wiring
Design Regulation on Greenhouse Dectrical Wiring This standard specifies the safety requirements for greenhouse electrical wiring and the selection, layout and connection of wires and cables. This standard is applicable to the electrical wiring design in various greenhouses (livestock and poultry breeding facilities can refer to it for implementation). 2 Referenced Standards
JB/T10296—2001
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB42081993
GB/T5465.1—1996
GB79471997
GB13955—1992
3 Wiring design documents
Enclosure protection level (IP code)
Principles for drawing graphic symbols for electrical equipment
Conductor color or digital identification
Leakage protection device installation and operation
3.1 The symbols used in the circuit design drawings shall comply with the relevant provisions of GB/T5465.1. 3.2 The entire wiring design document shall include:
a) Calculation of power load. Determine the total power consumption of the greenhouse: b) Layout of the distribution board. Including the interface between the greenhouse power consumption area and the power supply network, the orientation and size of the distribution board: c) Single line layout diagram. Used to indicate the number and size of electrical wires of electrical appliances; d) Wiring diagram. Used to express the direction, size and number and size of wires contained in each conduit. 4 Wiring principles
4.1 Basic principles
4.1.1 Electricity safety
4.1.1.1 Provide measures to prevent direct contact danger a) All electrical equipment must be well grounded, and its insulated cables should be able to withstand a 500V voltage test for 1min. b) All distribution boxes (boxes) should have an IP34 protection level as specified in GB4208. 4.1.1.2 Circuits with socket outputs should be equipped with leakage protectors, which should comply with the relevant provisions of GB13955, and their operating current should not exceed 30mA.
4.1.1.3 To prevent fire, a leakage protector with a rated operating current not exceeding 0.5A should be installed. 4.1.1.4 All wires should not be subjected to excessive tension. If metal pipes are used, the wires in the pipes should not be damaged. 4.1.2 The wires, cables and other equipment used must comply with the product standards. Approved by China Machinery Industry Federation on June 22, 2001, implemented on October 1, 2001
JB/T10296—2001
4.1.3 The color of wires or cables shall comply with the provisions of GB7947. 4.2 Selection of cables
4.2.1 Polyvinyl chloride insulated cables or rubber insulated cables shall be used in greenhouses. Bare conductors shall not be used, and the cable joints shall be tightly wrapped with insulating tape.
4.2.2 Determination of cable cross-sectional area
The cable cross-sectional area can be selected according to heating conditions. The load current must be less than the allowable current carrying capacity (safe current carrying capacity), that is, Js≤lx
Where: I, calculated load current;
Iyx—allowable current carrying capacity (allowable continuous current). The safe current carrying capacity of plastic insulated wires is shown in Table 1. The safe current carrying capacity of rubber insulated wires is shown in Table 2. The safe current carrying capacity of low-voltage insulated cables directly laid in the ground is shown in Table 3. The safe current carrying capacity of RV, RVS, RVB, BVV and BLVV type single wires when laid in the air is shown in Table 4. The safe current carrying capacity of BLXF, BLX, BX and BXR type rubber single core single wires when laid in the air is shown in Table 5. In addition, other mechanical stresses that the conductor may be subjected to should also be considered. 4.3 Prevention of mutual influence
4.3.1 The layout of electrical devices should ensure that there will be no adverse effects between the electrical devices and non-electrical devices of the building. 4.3.2 Weak current wires and cables and strong current wires and cables should be arranged separately and should not be subject to electromagnetic interference from strong current wires and cables. 5 Installation requirements
5.1 The connection between conductors and between conductors and other electrical equipment should be guaranteed to be safe and reliable. Reliable waterproofing measures should be taken at the conductor connection that is easily exposed to droplets. 5.2 The installation location of wires and cables should not affect the activities of people in the greenhouse and the normal operation of agricultural or horticultural machinery. 5.3 Wires and cables should not be routed separately in the greenhouse to avoid them becoming the support of climbing plants and causing unsafe factors. 5.4 When arranging wires and cables along the length of the greenhouse, try to run them along the gutter or beam. When arranging them along the width of the greenhouse, run them along the horizontal supporting pipes. Ensure coordination and neatness with the greenhouse environment. 5.5 Wiring below 2.6m in height in the greenhouse should have line protection sleeves to prevent mechanical damage. 5.6 The control system panel wiring should be installed and wired in front of the panel for easy maintenance. 5.7 When the power control cabinet is not placed in the greenhouse, cables or wires can enter the greenhouse from the air or underground. When entering the greenhouse from the air, the height of the wire should be based on the principle of not affecting other work activities. When entering the greenhouse from underground, the buried depth of cables and wires is less than 0.8m and exceeds the frozen soil depth. The wires should be protected by PVC plastic pipes.
6 Safety operation signs
Each distribution box and electrical device in the greenhouse should have eye-catching safety warning signs, and their safety warning signs should comply with the relevant provisions of national standards. 7 Inspection and Acceptance
All electrical wiring should be inspected and tested before being put into operation to verify that the completed project meets Standard 2
7.1 Insulation Inspection
JB/T10296—2001
After wiring is completed, insulation inspection must be carried out to prevent leakage and current connection. Inspection of control cabinets and distribution boards
During the inspection, the circuits, line number markings, wiring positions, control operation sequences and safety signs must be checked for correctness before debugging. 7.3www.bzxz.net
Line Inspection
Check the electrical circuits, line number markings, wiring methods and positions of the executive equipment, and check them against the control cabinet wiring to ensure the correct operation of the executive equipment.
7.4 Leakage Protection Test
The leakage protection test shall comply with the requirements of Chapter 7 of GB139551992. 5 Run Check
Press 7.1, 7.2, 7.3 and 7.4 After the inspection is correct, the operation inspection can be carried out. For items that can be controlled manually, such as wet curtains, window opening mechanisms, and curtain and rolling curtain mechanisms, the operation test can be carried out directly. For the above items that are automatically controlled by instruments such as temperature, humidity, wind, and light, simulation methods should be used for testing.
Cross-sectional area
For fixed wiring
Number of roots/single
Diameter
Steel pipe wiring
Table 1 Safe current carrying capacity of some plastic insulated wires
Plastic pipe wiring
Sheathed wire
Three and four
Effective resistance at 50℃
Length when the open wire device is fully loaded and the voltage drops
1V
/T10296-2001
Cross-sectional area
For fixed wiring
root Number/single
root diameter
Steel pipe wiring
Table 2 Partial safe current-carrying capacity of rubber insulated wire
Plastic pipe wiring
Sheathed wire
Three and four
Effective resistance at 50℃
Length when the open wire device is fully loaded
loaded and the voltage is reduced
1V
Note: The maximum allowable operating temperature of the wire core is 65℃. In places where the ambient air temperature (referring to the average maximum temperature of the highest month in the local area) exceeds 35℃, the safe current-carrying capacity should be multiplied by the correction factor in the following table. Ambient air temperature
Correction coefficient
/T10296-2001
Nominal cross-sectional area
JB/T10296—2001
3 Table 3 of safe current carrying capacity of some low-voltage insulated cables (copper and aluminum) directly laid in the ground
Two-core cable
Note: In the table, for safe current carrying capacity,
three-core cable
the maximum operating temperature of the core is 80℃,
ground temperature For 30℃, the flow rate should be multiplied by the correction factor in the following table. Correction factor 4RV, RVB, Nominal cross-sectional area Four-core cable Safe current carrying capacity of the cable when the actual ground temperature is not 30℃ (+25℃) for single RVS, BWV and BLVV type wires laid in the air Long-term continuous load allowable current carrying capacity BLX, The current carrying capacity BLXF of single-core single wire of BX and BXR rubber wire laid in the air,
nominal cross-sectional area
permissible current carrying capacity under long-term continuous load
corresponding wire surface temperature
mechanical industry standard
greenhouse electrical wiring design specification
JB/T10296-2001
published by the Mechanical Science Research Institute
printed by the Mechanical Science Research Institute
(Beijing First No. 2, Ti-Nan Road: Postal Code 100044)*
Format 880×12301/16 Printing Sheet 3/4
4 Words 14,000
First Edition September 2001
First Printing September 2001
Print Quantity 1-500
Price 1200 Yuan
2001-136
Mechanical Industry Standard Service Network: http/kwwwJB.ac.cn9
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