GB 50194-1993 Safety specification for power supply and use at construction sites of construction projects GB50194-93
Some standard content:
Engineering construction standard full text information system
National Standard of the People's Republic of China
50194—93
Safety code of power supply and consumption for installation construction engineeringBuilding standard
1993—12—30
1994—08—01
1Implementation
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering construction standard full text information system
Jointly issued
Engineering construction standard full text information system
National Standard of the People's Republic of China
Safety code of power supply and consumption for installation construction engineeringGB50194—93
Editor department: Ministry of Electric Power Industry of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: August 1, 1994
Engineering construction standard full text information system
Engineering construction standard full text information system
Notice on the release of the national standard "Safety Specification for Power Supply and Use at Construction Site of Construction Projects"
|Construction Standard [1994] No. 22
According to the requirements of the State Planning Commission's Jizong (1986) No. 2630 document and the Ministry of Construction's Standard and Norms Department (90) Jianbiao Jizi No. 5 document, the former Ministry of Energy's Electric Power Construction Research Institute is responsible for editing and jointly compiled with relevant units. The national standard "Safety Specification for Power Supply and Use at Construction Site of Construction Projects" has been reviewed by relevant departments. The "Safety Specification for Power Supply and Use at Construction Site of Construction Projects" GB50194—93 is now approved as a mandatory national standard and will be implemented from August 1, 1994.
This specification is managed by the Ministry of Electric Power Industry, and its specific interpretation and other work is undertaken by the Electric Power Construction Research Institute of the Ministry of Electric Power Industry, and its publication and distribution is organized by the Standard and Norms Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
December 30, 1993
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
2 Power generation facilities, substation facilities, and distribution facilities.
2.1 Power generation facilities
2.2 Substation facilities and distribution facilities
3 Overhead distribution lines and cable lines..
3.1 Selection and burial of poles
3.2 Line erection
3.3 Cable laying
4 Grounding protection and lightning protection
4.1 Grounding protection
4.2 Lightning protection
5 Commonly used electrical equipment.
General provisions||tt| |5.2 Distribution box and switch box
5.3 Fuses and sockets
5.4 Mobile power tools and handheld power tools5.5. Electric welding machine
5.6 Crane
6 Special environment
6.1 Flammable and explosive environment
6.2 Corrosive environment"
6.3 Particularly humid environment
8 Safety technology management
（3）)
（16)
Engineering construction standard full text information system
Appendix A
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Attached Clauses
Engineering Construction Standards Full Text Information System
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Engineering Construction Standards Full Text Information System
1 This specification is formulated to implement the principle of "safety first, prevention first" in the power supply and use at the construction site of construction projects, to ensure the personal safety and equipment safety in the power supply and use at the construction site, and to ensure the design, construction, operation and maintenance of power supply and use facilities at the construction site to be safe and reliable, ensure quality, and be economically reasonable. 1.0.2 This specification is applicable to the design, construction, operation and maintenance of power supply and use facilities at construction sites for general industrial and civil construction projects with voltages of 10KV and below. However, it is not applicable to underwater and underground mines. and special projects such as mines. 1.0.3 The safety and reliability of power supply and use at the construction site of the construction project shall comply with the provisions of the relevant current national standards and specifications in addition to the implementation of this specification. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2 Power Generation Facilities, Substation Facilities, Distribution Facilities 2.1 Power Generation Facilities
2.1.1 In construction sites far away from the power source or where the power source cannot meet the requirements, diesel generators, train power stations and other power generation facilities can be installed. 2.1.2
The site selection of the power station shall meet the following requirements: 2.1.2.1
Close to the load center.
Convenient transportation and line extraction.
Located on the leeward side of the minimum frequency wind direction of the pollution source throughout the year. 2.1.2.4
Away from dangerous construction areas.
2.1.3 The layout of the power station area shall meet the following requirements: 2.1.3.1
The buildings should be compact and in line with the production and operation procedures. 2.1.3.2
The generator room is located on the main wind side of the lowest frequency wind direction in the station area throughout the year: the control room and the distribution room are located on the leeward side of the machine room. 2.1.3.3 The cooling water pool and the fountain are located on the upwind side of the lowest frequency wind direction in winter for the machine room and the outdoor distribution device.
2.1.3.4 The ground drainage slope in the station should not be less than 0.5%. 2.1.4 Fuel tanks should be steel tanks, and the number should not be less than 2. 2.1.5 The accident oil pool should be located outside the generator room, and the distance between it and the outer wall of the generator room should not be less than 5m. The oil storage capacity of the accident oil pool should not be less than the total daily fuel oil.
The diesel engine should have a separate exhaust pipe and silencer, and the exhaust pipe laid overhead in the generator room should be equipped with an insulation layer. Fire prevention measures should be taken when the exhaust pipe in the trench crosses the oil pipeline. The distance from the exhaust pipe laid vertically outside the generator room to the generator room shall not be less than 1m, and the exhaust pipe mouth shall be higher than the eaves and not less than 1m. 21. The parking place of the mobile diesel generator should be flat and should be 0.250.3m higher than the surrounding ground surface. The front and rear wheels of the diesel generator trailer should be stuck. 2.1.8
The trailer of the mobile diesel generator should have a reliable grounding. 2.1.9 A rain shelter should be installed on the top of the mobile diesel generator trailer. The rain shelter should be firm and reliable.
2.1.10 Stoves and blowtorches shall not be used within 4m around the mobile diesel generator, and flammable materials shall not be stored.
2.1.11 The total capacity of the diesel generator should meet the needs of the maximum load and the requirements for starting large-capacity motors. The bus voltage should not be lower than 80% of the rated voltage when starting.
Diesel generators running in parallel should be equipped with synchronization devices. 2.1.13 Short-circuit protection, overload protection and low-voltage protection devices should be installed on the outlet side of the diesel generator.
2.1.14 Fire-fighting facilities that can be used in live places should be installed in the power station and should be located in a place that is easy to access.
2.2 Transformer facilities and distribution facilities
1 The site selection of the substation and distribution station should meet the following requirements: 2.2.1
2.2.1.1 Close to the power source and convenient for transportation and transportation. 2.2.1.2
Close to the load center to facilitate the introduction and extraction of lines. 2.2.1.3
The area is not subject to flooding and water accumulation, and the ground drainage slope is not less than 0.5%.
2.2.1.4 It is located on the leeward side of the minimum frequency wind of the pollution source throughout the year, and avoids flammable and explosive dangerous areas and places with severe vibration. 2.2.2 The buildings of transformer room, control room and distribution room shall meet the following requirements: 2.2.2.1 Rainproof, windproof and sandproof, fire protection level is not less than level three, of which the transformer room is not less than level two.
2.2.2.2 Use shutters or windows with metal mesh, and the metal mesh holes are not larger than 10mmX10mm.
The lower eaves of the high windows for lighting in the night strip of the project 2 are not less than 1.8m above the outdoor ground. Engineering Construction Standard Full Text Information System
2.2.2.4 The door opens outwards, and its height and width are convenient for equipment to enter and exit. 2.2.2.5
The area and height shall meet the safety distance required for the maintenance and operation of the power distribution equipment and comply with the provisions of the relevant national standards in force. 2.2.3 Transformers with a capacity of 400kVA or less can be installed on poles. The height of the bottom of the pole transformer from the ground should not be less than 2.5m. 2.2.4 Transformers with a capacity of more than 400kVA should be installed on the ground. The platform for installing the transformer should be 0.5m above the ground, and a fence with a height of not less than 1.7m should be installed around it. The distance between the fence and the outer contour of the transformer should not be less than 1m, and a warning sign should be hung at its obvious location.
2.2.5 High and low voltage fuses should be installed on the high and low voltage sides of the outdoor substation transformer respectively. The vertical distance between the fuse and the ground should not be less than 4.5m for high voltage and 3.5m for low voltage. The horizontal distance between the fuses of each phase should not be less than 0.5m for high voltage and 0.3m for low voltage.
2.2.6 For transformer platforms located between trees on the sidewalk, the minimum distance between the live parts and the treetops at the maximum wind deflection should not be less than 2m for high voltage and 1m for low voltage. 2.2.7 When the transformer lead is connected to the cable, the cable and its terminal head should not be in direct contact with the transformer casing.
2.2.8 When a box-type substation is used for power supply, its casing should have reliable protective grounding. The grounding system should meet the product technical requirements; the box door equipped with instruments and relays must be reliably connected to the shell.
2.2.9 After the box-type substation is installed or overhauled, the electrical equipment inside it should be inspected and the electrical performance test should be carried out before it is put into operation. It can only be put into operation after passing the test. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Overhead distribution lines and cable lines
3.1 Selection and burial of poles
3.1.1 Reinforced concrete poles should be used for poles. Reinforced concrete poles shall not have exposed tendons and shall not have defects such as circumferential cracks and twisting. If wooden poles and wooden cross arms are used, their materials must be solid and shall not be rotten, split or otherwise damaged. The total length of the wooden pole should not be less than 8m, and the tip diameter should not be less than 140mm.
3.1.2 The buried pole should meet the following requirements: 3.1.2.1 There should be no tilting, sinking, or water accumulation at the pole base. If the requirements cannot be met, a chassis or a chuck should be added.
3.1.2.2 When backfilling the soil, the soil blocks should be broken up and compacted once every 0.5m of backfilling. The pole pit should be equipped with an anti-sinking soil platform, and its height should exceed the ground by 0.3m. 3.1.2.3 The buried depth of the pole should meet the design requirements. When there is no design requirement, it should meet the requirements of Table 3.1.2.
Buried depth of pole (m)
Note: In case of soft soil, quicksand, high groundwater level, etc., special treatment should be done. In severe cold areas, it should be buried below the frozen soil layer.
The buried depth of the pole equipped with a transformer should not be less than 2m. 3.1.3 The buried wire shall meet the following requirements: 3.1.3.1 The depth of the wire pit should be 1.2~1.5m. The angle between the wire and the pole should not be less than 45°. When restricted by the terrain, it should not be less than 30°. The wire of the full terminal pole and the load-bearing wire of the tension pole should be aligned with the line direction; the angle of the angle of the line should be aligned with the line direction: the windproof wire should be perpendicular to the line direction. 3.1.3.4 When the wire passes through the conductors, the wire insulator should be installed. The height of the wire insulator from the ground should not be less than 2.5m. 3.2 Line erection
3.2.1 The selection of the power supply line path should be reasonable, and should avoid areas that are easy to collide, touch, be easily eroded by rain and gas corrosion, and should avoid thermal pipelines, rivers and places with frequent traffic during construction.
3.2.2 Insulated wires shall be used for low-voltage overhead lines in construction sites in areas where personnel frequently move around or where large machines and tools are concentrated. Insulated wires shall not be laid overhead in bundles, and shall not be directly tied to poles, trees, or scaffolds, nor dragged on the ground. When laid on the ground, they must be passed through pipes, and there shall be no joints in the pipes, and the pipe openings shall be sealed. 3.2.3 The selection of conductor cross-sections shall meet the following requirements: 3.2.3.1 The load current in the conductor shall not be greater than the allowable current carrying capacity of the conductor. 3.2.3.2
The allowable voltage drop at the end of the line shall not be greater than 5% of the rated value. 3.2.3.3
When the conductor crosses a railway, highway, or other power line, the cross-section of the copper stranded wire shall not be less than 16mm; the cross-section of the steel core aluminum stranded wire shall not be less than 25mm, and the cross-section of the aluminum stranded wire shall not be less than 35mm.
3.2.4 When the lines cross each other, the minimum vertical distance between the conductors of different lines shall comply with the provisions of Table 3.2.4.
Minimum vertical distance between conductors when lines cross (m) Line voltage (kv)bzxz.net
Crossing electric
power lines
5The minimum distance between the line conductor and the ground at the maximum sag shall comply with the provisions of Table 3.2.5
3.2.5.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Minimum distance between the conductor and the ground at the maximum sag (m) Area
Regions with frequent personnel activities
Regions with frequent non-personnel activities
Extremely deviated areas
Voltage (kv)
The minimum distance between the line conductor and the protruding part of the building at the maximum sag and maximum wind deviation shall comply with the provisions of Table 3.2.6. Minimum distance between conductor and protruding part of building (m)
Vertical distance
Horizontal distance of side conductor
Line voltage (kv)
When several lines are installed on the same pole at the construction site, the high-voltage line must be located above the low-voltage line; the power line must be located above the communication line, and the minimum vertical distance between the cross arms of the lines installed on the same pole shall comply with the specified values in Table 3.2.7. Minimum vertical distance between cross arms of lines erected on the same pole (m) Lines on the same pole
High voltage and high voltage
High voltage and low voltage
High voltage and low voltage
High voltage and communication
Straight pole
Branch pole or corner pole
0.45/0.6Note
Note: For corner or branch lines with single circuit, the cross arm of the branch line is 0.6m away from the cross arm of the main line; for double circuits, the cross arm of the branch line is 0.45m away from the cross arm of the upper main line, and 6m away from the cross arm of the lower main line.Full-text information system2.
Deepness of buried poles (m)
Note: Special treatment should be done when there are soft soil, quicksand, high groundwater level, etc. In severe cold areas, the poles should be buried below the frozen soil layer.
The buried depth of poles equipped with transformers should not be less than 2m. 3.1.3 The buried wires should meet the following requirements: 3.1.3.1 The depth of the wire pit should be 1.2~1.5m. The angle between the wire and the pole should not be less than 45°. When restricted by the terrain, 3.1.3.2
It should not be less than 30°
The wires of the full-terminal poles and the load-bearing wires of the tension poles should be aligned with the direction of the line; the engineering construction standard full-text information system
The angle wires should be aligned with the angle direction of the line: the windproof wires should be perpendicular to the line direction. 3.1.3.4 When the guy wire passes through the conductors, a guy wire insulator should be installed. The height of the guy wire insulator from the ground should not be less than 2.5m. 3.2 Line installation
3.2.1 The selection of the power supply line path should be reasonable, and should avoid areas that are easy to collide, bump, be easily affected by rain erosion and gas corrosion, and should avoid thermal pipelines, rivers and places with frequent traffic during construction.
3.2.2 Insulated wires should be used for low-voltage overhead lines in areas where personnel frequently move or where large machines and tools are concentrated. Insulated wires shall not be laid overhead in bundles, and shall not be directly tied to poles, trees, scaffolding, or dragged on the ground: When laying on the ground, pipes must be passed through, and there shall be no joints in the pipes, and the pipe openings shall be sealed. 3.2.3 The selection of the conductor cross-section shall meet the following requirements: 3.2.3.1 The load current in the conductor shall not be greater than the allowable current carrying capacity of the conductor. 3.2.3.2
The allowable voltage drop at the end of the line shall not be greater than 5% of the rated value. 3.2.3.3
When the conductor crosses the railway, highway or other power lines, the cross-section of the copper stranded wire shall not be less than 16mm; the cross-section of the steel core aluminum stranded wire shall not be less than 25mm, and the aluminum stranded wire shall not be less than 35mm.
3.2.4When the lines cross each other, the minimum vertical distance between the conductors of different lines shall comply with the provisions of Table 3.2.4.
Minimum vertical distance between conductors when lines cross (m) Line voltage (kv)
Crossing power
Power lines
5The minimum distance between the line conductor and the ground shall comply with the provisions of Table 3.2.5
3.2.5 at the maximum sag.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Minimum distance between conductor and ground at maximum sag (m) Area
Frequently active areas of personnel
Non-frequently active areas of personnel
Extremely deviated areas
Voltage (kv)
The minimum distance between the conductor and the protruding part of the building at maximum sag and maximum wind deflection shall comply with the provisions of Table 3.2.6. Minimum distance between the conductor and the protruding part of the building (m) Item
Vertical distance
Horizontal distance of the side conductor
Line voltage (kv)
When several lines are installed on the same pole at the construction site, the high-voltage line must be located above the low-voltage line; the power line must be located above the communication line, and the minimum vertical distance between the cross arms of the lines installed on the same pole shall comply with the specified values in Table 3.2.7. Minimum vertical distance between cross arms of lines erected on the same pole (m) Lines on the same pole
High voltage and high voltage
High voltage and low voltage
High voltage and low voltage
High voltage and communication
Straight pole
Branch pole or corner pole
0.45/0.6Note
Note: For corner or branch lines with single circuit, the cross arm of the branch line is 0.6m away from the cross arm of the main line; for double circuits, the cross arm of the branch line is 0.45m away from the cross arm of the upper main line, and 6m away from the cross arm of the lower main line.Full-text information system2.
Deepness of buried poles (m)
Note: Special treatment should be done when there are soft soil, quicksand, high groundwater level, etc. In severe cold areas, the poles should be buried below the frozen soil layer.
The buried depth of poles equipped with transformers should not be less than 2m. 3.1.3 The buried wires should meet the following requirements: 3.1.3.1 The depth of the wire pit should be 1.2~1.5m. The angle between the wire and the pole should not be less than 45°. When restricted by the terrain, 3.1.3.2
It should not be less than 30°
The wires of the full-terminal poles and the load-bearing wires of the tension poles should be aligned with the direction of the line; the engineering construction standard full-text information system
The angle wires should be aligned with the angle direction of the line: the windproof wires should be perpendicular to the line direction. 3.1.3.4 When the guy wire passes through the conductors, a guy wire insulator should be installed. The height of the guy wire insulator from the ground should not be less than 2.5m. 3.2 Line installation
3.2.1 The selection of the power supply line path should be reasonable, and should avoid areas that are easy to collide, bump, be easily affected by rain erosion and gas corrosion, and should avoid thermal pipelines, rivers and places with frequent traffic during construction.
3.2.2 Insulated wires should be used for low-voltage overhead lines in areas where personnel frequently move or where large machines and tools are concentrated. Insulated wires shall not be laid overhead in bundles, and shall not be directly tied to poles, trees, scaffolding, or dragged on the ground: When laying on the ground, pipes must be passed through, and there shall be no joints in the pipes, and the pipe openings shall be sealed. 3.2.3 The selection of the conductor cross-section shall meet the following requirements: 3.2.3.1 The load current in the conductor shall not be greater than the allowable current carrying capacity of the conductor. 3.2.3.2
The allowable voltage drop at the end of the line shall not be greater than 5% of the rated value. 3.2.3.3
When the conductor crosses the railway, highway or other power lines, the cross-section of the copper stranded wire shall not be less than 16mm; the cross-section of the steel core aluminum stranded wire shall not be less than 25mm, and the aluminum stranded wire shall not be less than 35mm.
3.2.4When the lines cross each other, the minimum vertical distance between the conductors of different lines shall comply with the provisions of Table 3.2.4.
Minimum vertical distance between conductors when lines cross (m) Line voltage (kv)
Crossing power
Power lines
5The minimum distance between the line conductor and the ground shall comply with the provisions of Table 3.2.5
3.2.5 at the maximum sag.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Minimum distance between conductor and ground at maximum sag (m) Area
Frequently active areas of personnel
Non-frequently active areas of personnel
Extremely deviated areas
Voltage (kv)
The minimum distance between the conductor and the protruding part of the building at maximum sag and maximum wind deflection shall comply with the provisions of Table 3.2.6. Minimum distance between the conductor and the protruding part of the building (m) Item
Vertical distance
Horizontal distance of the side conductor
Line voltage (kv)
When several lines are installed on the same pole at the construction site, the high-voltage line must be located above the low-voltage line; the power line must be located above the communication line, and the minimum vertical distance between the cross arms of the lines installed on the same pole shall comply with the specified values in Table 3.2.7. Minimum vertical distance between cross arms of lines erected on the same pole (m) Lines on the same pole
High voltage and high voltage
High voltage and low voltage
High voltage and low voltage
High voltage and communication
Straight pole
Branch pole or corner pole
0.45/0.6Note
Note: For corner or branch lines with single circuit, the cross arm of the branch line is 0.6m away from the cross arm of the main line; for double circuits, the cross arm of the branch line is 0.45m away from the cross arm of the upper main line, and 6m away from the cross arm of the lower main line.Full-text information system
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