GBJ 303-1988 Building electrical installation engineering quality inspection and assessment standard GBJ303-88

GBJ 303-1988 Building electrical installation engineering quality inspection and assessment standard GBJ303-88 GBJ303-1988 standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Building Electrical Installation Engineering
Quality Inspection and Evaluation Standard
GBJ303-88
Engineering Construction Standard Full-text Information System
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National Standard of the People's Republic of China
Building Electrical Installation
Quality Inspection and Evaluation Standard
GBJ303-88
Editor Department: Former Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Approval Department: Construction of the People's Republic of China||tt| |Effective Date: 1989
Engineering Construction Standards Full-text Information System
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Notice on the Release of Six Inspection and Evaluation Standards Including the National Standard "Uniform Standard for Inspection and Evaluation of Building Installation Project Quality" (88) Jianbiao No. 335
According to the former State Construction Commission (79) Jianfa Shi Zi No. 168 document and the former Ministry of Urban and Rural Construction and Environmental Protection (85) Chengke Zi No. 293 notice, the sixth inspection and evaluation standard of the "Uniform Standard for Inspection and Evaluation of Building Installation Project Quality" revised by the former Ministry of Urban and Rural Construction and Environmental Protection has been reviewed by relevant departments and is now approved as a national standard for implementation on January 1, 1989. The provisions on elevators in the former national standards "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Building Project) TJ301-74, "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Pipeline Project) TJ302-74, "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Electrical Project) TJ303-75, "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Ventilation Project) TJ304-74 and "Standard for Inspection and Assessment of Quality of Building Installation Projects" (General Machinery and Equipment Installation Project) TJ305-75 are abolished at the same time.
The six inspection and assessment standards currently approved are managed by the Construction Supervision Department of the Ministry of Construction. The names, numbers and interpretation units of each item are as follows: 1. "Uniform Standard for Inspection and Assessment of Quality of Building Installation Projects" GBJ300-88, and its specific interpretation and other work are the responsibility of the China Academy of Building Research. 2. "Standard for Inspection and Assessment of Quality of Building Projects" GBJ301-88, and its specific interpretation and other work are the responsibility of the China Academy of Building Research. 3. The specific interpretation of GBJ302-88 Inspection and Assessment Standard for Building Heating, Sanitation and Gas Engineering is the responsibility of Shenyang Construction Engineering Administration. 4. The specific interpretation of GBJ303-88 Inspection and Assessment Standard for Building Electrical Installation Engineering is the responsibility of Zhejiang Provincial Construction Engineering Corporation Industrial Equipment Installation Company.
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5. GBJ304-88 Inspection and Assessment Standard for Ventilation and Air Conditioning Engineering is the responsibility of Shanghai Industrial Equipment Installation Company. 6. GBJ310-88 Inspection and Assessment Standard for Elevator Installation Engineering is the responsibility of Beijing Equipment Installation Engineering Company. The publication and distribution of the above six inspection and assessment standards are the responsibility of China Construction Industry Press. Ministry of Construction of the People's Republic of China
November 5, 1988
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Revision Notes
This standard is based on the former National Construction Committee (79) Jianfa Shi Zi No. 168 and the former Ministry of Urban and Rural Construction and Environmental Protection (85) Chengke Zi No. 293 Notice, and the Zhejiang Provincial Construction Engineering Corporation Installation Company, together with the Zhejiang Provincial First Construction Company and the Hangzhou Municipal Construction Engineering Corporation Installation Company, formed a revision group to revise the "Construction Installation Engineering Quality Inspection and Assessment Standard" TJ303-75 Electrical Engineering. After the revision, it was renamed "Construction Electrical Installation Engineering Quality Inspection and Assessment Standard".
During the revision process, extensive investigations and studies were conducted, and opinions from all parties were summarized. After the first draft, the draft for soliciting opinions, and the draft for submission were written, they were sent to various places for comments, and a trial was organized. Finally, a national meeting was held to review and finalize the draft. In view of the current development of building electrical installation projects, this standard not only retains the applicable provisions of the original standard, but also adds wire rope engineering for wiring, and supplements the content of new materials and new equipment, such as cable trays, on-load voltage-changing transformers, plastic troughs, etc. It highlights the safe use of electricity and its functions. It emphasizes that the quality of the project must be inspected and controlled throughout the construction process, and the main items in the sub-projects are changed to guaranteed items, general items are changed to basic items, and items with allowable deviations are changed to allowable deviation items. At the same time, quantitative indicators are given to basic items as much as possible, and two quality grade standards of "qualified" and "excellent" are stipulated.
This standard has five chapters and seventeen sections, and is accompanied by a table of inspection tools and wording. In the process of implementing this standard, please send your opinions and relevant information to the Installation Company of Zhejiang Construction Engineering Corporation for reference in future revisions. Construction Supervision Department of the Ministry of Construction
October 24, 1988
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Chapter 1
Chapter 2
General Principles·
Line Laying
Section 1
Overhead Line and Pole-mounted Electrical Equipment Installation EngineeringSection 2
Section 3
Section 4
Section 5
Section 6
Section Section 7
Chapter 3
Cable line engineering
Pipe and in-pipe wiring engineering·
Porcelain clip, porcelain column (bead) and porcelain bottle wiring engineering·Sheathed wire wiring engineering…
Trough plate wiring engineering
Wire rope engineering.
Hard busbar and sliding wiring installation
Section 1
Section 2
Chapter 4Www.bzxZ.net
Hard busbar installation engineering…
Sliding wiring and mobile soft cable installation engineering…Electrical equipment and facilities||tt| |Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Electrical transformer installation project
High-voltage switch installation project
Complete distribution cabinet (panel) and power switch cabinet installation projectLow-voltage electrical appliance installation project
Electrical inspection and wiring project of motor
Battery installation project·
Electrical lighting equipment and its distribution box (panel) installation projectChapter 5
Lightning protection Appendix 1 of the Installation Project of Needle (Network) and Grounding Device
Appendix 2
Inspection Tool Table
Terms Used in This Standard
Additional Explanation
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Chapter 1 General Provisions
Article 1.0.1 This standard is formulated to unify the inspection and evaluation methods for the quality of building electrical installation projects, promote enterprises to strengthen management, and ensure the quality of projects. Article 1.0.2 This standard applies to the inspection and evaluation of the quality of electrical installation projects in general industrial and civil buildings with a voltage of 10kV and below. Article 1.0.3 The main indicators and requirements of this standard are proposed in accordance with the provisions of the "Construction and Acceptance Code for Electrical Installation Projects" GBJ232-82 (hereinafter referred to as the "Construction Code").
When implementing this standard, the provisions of the "Uniform Standard for Inspection and Assessment of Building Installation Engineering Quality" GBJ300-88 shall also be followed.
Article 1.0.4 The quality of the equipment, appliances, materials and raw materials of the building electrical installation projects inspected and assessed by this standard shall comply with the relevant national technical standards in force. Article 1.0.5 The inspection and assessment of the quality of projects using imported equipment or equipment, as well as the demolition and reconstruction and reconstruction projects using old equipment and old equipment, may refer to this standard for implementation according to specific circumstances.
Chapter II Line Laying
Section 1 Overhead Line and Pole-mounted Electrical Equipment Installation Project (I) Guarantee Items
Article 2.1.1 The AC withstand voltage test results of high-voltage insulators and the test adjustment results of high-voltage electrical equipment must comply with the provisions of the construction specifications. Inspection Quantity Full inspection.
Inspection method Check the insulator withstand voltage test record and electrical equipment test adjustment record Engineering 6 Construction Standard Full Text Information System
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Article 2.1.2 The surface of high-voltage porcelain parts is strictly prohibited from having defects such as cracks, defects, and glaze burnout.
Inspection quantity All porcelain parts of electrical equipment shall be inspected; no less than 10% of line insulators shall be randomly inspected, with a focus on insulators on load-bearing rods. Inspection method Observation inspection and inspection of installation records. Article 2.1.3. The connection of the conductors must be tight and firm. There must be no broken strands or damage at the connection. The conductor joints must not have cracks after crimping or straightening. Inspection quantity: All inspections.
Inspection method, observation inspection and inspection of installation records. Article 2.1.4: For reinforced concrete poles connected by steel rings, the welding of the steel ring welds must comply with the provisions of the construction specifications. After welding, the curvature of the pole shall not exceed 2/1000 of its length.
Inspection quantity: 10% of the poles shall be randomly inspected, but not less than 5 poles. Inspection method: Observation inspection, inspection of welding records or actual measurement. (I) Basic items
Article 2.1.5: The installation of crossarms, insulators and hardware shall comply with the following provisions: Qualified: flat and firm, the angle between the crossarm and the center line of the line is correct, and the anti-corrosion protection of ferrous metal parts is complete.
Excellent: On the basis of qualified, the crossarm and the pole are in close contact, and the thread of the connecting bolt is exposed 2 to 3 turns from the nut. The galvanized layer of ferrous metal parts is good and free of defects. Inspection quantity: 10% random inspection, but not less than 5 locations. Inspection method: observation, manual inspection.
Article 2.1.6 The installation of guy wires and support poles shall comply with the following provisions: Qualified: correct position, complete hardware, firm connection, all guy wires on the same pole are under normal force, without loose strands, broken strands and cramps. Excellent: On the basis of qualification, the angle between the guy wire (support pole) and the pole is correct, the size of the anti-sinking platform for the guy wire (support pole) pit is correct, and there is no obvious deviation of the pole tip after the conductor is tightened.
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Inspection quantity: 10% random inspection, but not less than 5 groups. Inspection method: observation, manual inspection.
Article 2.1.7 The installation of conductors shall comply with the following provisions: Qualified: The conductors and insulators are reliably fixed, and the conductors have no broken strands, twists, or dead bends; the excessively worn segments and segments with other defects are repaired intact. Excellent: On the basis of qualified, the conductors have not been reinforced or repaired due to improper construction.
Inspection quantity Spot check 10% of the number of line grades, but not less than 5 grades. Inspection method Observation inspection and inspection of installation records. Article 2.1.8 The layout of jumpers, lead wires, and down conductors of the line shall comply with the following provisions:
Qualified: The minimum safe distance between conductors and between conductors and the ground meets the requirements of the construction specifications.
Excellent: On the basis of qualified, the conductors are arranged reasonably and neatly, and the direction of the connection between the wires is clear and easy to identify.
Inspection quantity Full inspection of the jumper on the pole, the place where the wire passes through the conductor, the intersection of the down conductor and the overhead line, and the lead wire between the crossarms. Inspection method Observation or actual measurement inspection.
Article 2.1.9 The installation of electrical equipment on poles shall meet the following requirements: Qualified: correct position, firm fixation, complete parts, flexible and accurate operation of operating mechanism, tight and reliable connection between wire and equipment terminal. Excellent: On the basis of qualified, the installation is flat, the rows are arranged neatly, the spacing is uniform, and the height is consistent.
Inspection quantity Full inspection.
Inspection method Observation and trial operation inspection.
Article 2.1.10 The installation of street lamps shall meet the following requirements: Qualified: The lamp position is correct and firmly fixed, the lead wire of the street lamp on the pole should be tightened; the lamp post of the garden street lamp is stable and vertical, the root junction box cover is complete, and the waterproof measures are good. Excellent: On the basis of qualified, the lamps are clean; the rows are installed neatly. Inspection quantity According to the different models or categories of lamps, 10% are randomly inspected, but not less than 10 Engineering Construction Standard Full Text Information System
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Inspection method Observation inspection.
Article 2.1.11 The laying of grounding (zero connection) branch lines for electrical equipment, appliances and non-live metal parts shall comply with the following provisions: Qualified: The connection is tight and firm, the cross-section of the grounding (zero connection) line is selected correctly, and the parts that need to be anti-corrosive are painted evenly without omission.
Excellent: On the basis of qualified, the line direction is reasonable, the color standard is accurate, and the equipment and buildings are not polluted after painting.
Inspection quantity: 5 places are randomly inspected.
Inspection method: Observation inspection.
(III) Allowable deviation items
Article 2.1.12 The allowable deviation and inspection method of pole assembly and conductor sag shall comply with the provisions of Table 2.1.12.
Inspection quantity: 10% of poles are randomly inspected, but not less than 5 bases, and 5 grades of conductors are randomly inspected. Items of allowable deviation and inspection method for pole assembly and conductor sag
Pole assembly
Horizontal position offset of the center of straight single pole and combined double pole
Height difference between the two poles of combined double pole
Verticality of pole (i.e. tilt displacement of pole tip)
Difference between actual and design values
Sag difference between conductors in the same level
Note: D is the pole tip diameter.
Allowable deviation
5 Cable line engineering
Section 2
(I) Guarantee items
Table 2.1.12
Inspection method
Use level, latitude and longitude
meter or pull line and ruler
Measurement by ruler
Article 2.2.1 The results of the withstand voltage test, leakage current and insulation resistance of the cable must comply with the provisions of the construction specifications.
Inspection quantity Check all.
Inspection method Check the test record.
Article 2.2.2 The laying of cables must comply with the following provisions: It is strictly forbidden to have defects such as twisting, armor flattening, sheath rupture and severe surface scratches on the cable; when laying directly buried, it is strictly forbidden to lay it parallel above or below the pipeline. Inspection quantity: All inspections.
Inspection method: Observation inspection and inspection of hidden engineering records. Article 2.2.3: The production and installation of cable terminals and cable joints must comply with the following regulations:
, Tight sealing, full filling, no bubbles, no oil leakage: The core wires are tightly connected, the insulation tape is tightly wrapped, and the moisture-proof paint is evenly applied; the lead sealing surface is smooth, without sand holes and cracks.
2. The semiconductor tape and shielding tape of the cross-linked polyethylene cable head shall not be wrapped beyond the maximum point in the middle of the stress cone, the cone slope is symmetrical, and the surface is smooth. 3. The cable head is installed and fixed firmly, and the phase sequence is correct. The protection measures for direct buried cable joints are complete, and the markings are accurate and clear.
Inspection quantity: 10% of the cable heads of different categories are randomly inspected, but not less than 5.
Inspection method: Observation inspection and inspection of installation records. (I) Basic items
Article 2.2.4 The installation of cable supports and brackets shall comply with the following provisions: Qualified: correct position, reliable connection, firm fixation, complete paint, smooth and uniform transition of the cable at the bend, and the cover of the bracket cover is complete. Excellent: on the basis of qualified, the spacing is uniform, the arrangement is neat, the horizontal and vertical are flat, and the paint color is uniform.
Inspection quantity: 5 sections are randomly inspected for each type of support and bracket. Inspection method: Observation and inspection.
Article 2.2.5 The installation of cable protection pipes shall comply with the following provisions: Engineering 10 Standards Full Text Information System
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Qualified: The pipe mouth is smooth, without burrs, firmly fixed, and well anti-corrosion. There is no bending phenomenon at the bend, and its bending radius is not less than the minimum allowable bending radius of the cable; the protective pipe mouths entering and exiting trenches, tunnels and buildings are tightly closed. Excellent: On the basis of qualification, there are no obvious wrinkles and unevenness at the bends, and the slope and slope of the protection pipes entering and exiting trenches, tunnels and buildings are correct. The exposed parts are horizontal and vertical, and the rows are neatly arranged.
Inspection quantity According to different laying methods, 5 places are randomly inspected at each site. Inspection method Observation and inspection.
Article 2.2.6 Cable laying shall comply with the following provisions: Qualified:
1. The coordinates and elevations are correct, the arrangement is neat, and the marking piles and signboards are accurately set; the cable protection measures with flame retardant, heat insulation and anti-corrosion requirements are complete. 2. When laying on the bracket, it is fixed reliably, the cable arrangement order on the same side bracket is correct, the control cable should be placed below the power cable, and the power cable of 1kV and below should be placed below the power cable above V: The main requirements for the backfill of the buried depth of the direct buried cable, the protection measures, and the minimum distance between the cables and the cables and the underground pipeline network should all comply with the construction specifications. Excellent: On the basis of qualification, the cable turns and branches are not tied in disorder, and the direction is neat and clear; the cable markers and signs are clear and complete: the hidden engineering records and schematics of the straight cable are complete and accurate.
Number of inspections: 5 locations are randomly inspected according to different laying methods. Inspection method: Observation inspection and inspection of hidden engineering records and schematics Article 2.2.7 The inspection and evaluation of the laying of cables and their supports, brackets and protective tubes for grounding (zero connection) branch lines shall be carried out in accordance with the provisions of Article 2.1.11 of this standard. (Sub) Allowable deviation items
Article 2.2.8 The installation allowable deviation of the exposed cable bracket, the minimum bending radius of the cable and the inspection method shall comply with Table 2.2.8. Inspection quantity: 5 sections of each bracket according to different types; 5 locations of each cable according to different categories.
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