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GB 50303-2015 English PDF (GB50303-2015)

GB 50303-2015 English PDF (GB50303-2015)

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GB 50303-2015: Code for acceptance of construction quality of building electrical engineering

This code is applicable to the construction quality acceptance of building electrical installation project with voltage class of 35kV or below. Building electrical engineering construction quality acceptance shall meet those specified in this code as well as the current relevant ones of the nation.
GB 50303-2015
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
UDC
P GB 50303-2015
Code for Acceptance of Construction Quality of Building
Electrical Engineering
ISSUED ON: DECEMBER 3, 2015
IMPLEMENTED ON: AUGUST 1, 2016
Issued by: Ministry of Housing and Urban-Rural Construction of the PEOPLE Republic of China;
General Administration of Quality Supervision, Inspection and
Quarantine of the PEOPLE Republic of China.
Table of Contents
Foreword ... 4
1 General Provisions ... 10
2 Terms and Symbols ... 11
2.1 Terms ... 11
2.2 Symbols ... 13
3 Basic Requirements ... 14
3.1 General Requirements ... 14
3.1.5 Electrical equipment, wiring system and relay protection system with high-voltage must pass the hand-over test... 14
3.1.7 Exposed-conductive-part of electrical equipment shall separately connect to protective conductor, and it must not be in series connection; material and sectional area of connecting conductor shall meet the design requirements... 14
3.2 Site Acceptance of Main Equipment, Materials, Finished Product and Semi-finished Products ... 14
3.3 Confirmation of Process Handover ... 20
3.4 Division and Acceptance of Divisional Project (Subdivisional Project) ... 25 4 Installation of Transformer and Box-type Distribution Station ... 28
4.1 Dominant Item ... 28
4.2 General Item ... 29
5 Installation of Complete Set Distribution Cabinet, Control Cabinet (Console, Box), Distribution Box (Switch Board) ... 31
5.1 Dominant Item ... 31
5.2 General Item ... 33
6 Check the Wiring of Electromotor, Electrical Heater and Electric Actuating Machine 37
6.1 Dominant Item ... 37
6.2 General Item ... 37
7 Installation of Diesel Power Generating Set ... 39
7.1 Dominant Item ... 39
7.2 General Item ... 39
8 Installation of UPS and EPS ... 41
8.1 Dominant Item ... 41
8.2 General Item ... 42
9 Testing and Power Test Run of Electrical Equipment ... 43
9.1 Dominant Item ... 43
9.2 General Item ... 43
10 Installation of Busway ... 44
10.1 Dominant Item ... 44
10.2 General Item ... 45
11 Installation of Ladder, Tray and Trunking ... 48
11.1 Dominant Item ... 48
11.2 General Item ... 49
12 Conduit Laying ... 51
12.1 Dominant Item ... 51
12.1.2 The steel conduit shall not be connected by butt fusion welding; the galvanized steel conduit or steel conduit with wall thickness less than or equal to 2 mm shall not be adopted with bushing fusion welding connection... 51
12.2 General Item ... 52
13 Cable Laying ... 56
13.1 Dominant Item ... 56
13.1.5 Single-core AC cable or each phase cable after phase splitting shall not be introduced into the steel conduit singly; fixtures and bearers used for fixing shall not form closed magnetic circuit... 56
13.2 General Item ... 57
14 Conduit Wiring and Trunking Wiring ... 60
14.1 Dominant Item ... 60
14.2 General Item ... 60
15 Straight Laying of Plastic Sheathed Wire ... 62
15.1 Dominant Item ... 62
15.2 General Item ... 62
16 Steel Rope Wiring ... 64
16.1 Dominant Item ... 64
16.2 General Item ... 64
17 Cable Head Production, Wire Connection and Line Insulation Test ... 66 17.1 Dominant Item ... 66
17.2 General Item ... 67
18 Installation of Ordinary Luminaire ... 69
18.1 Dominant Item ... 69
18.1.5 As for the exposed conductive part of Class I luminaire of ordinary luminaire, copper- cored flexible wire must be adopted to connect it with the protective conductor reliably; the junction shall be arranged with earthing mark and the sectional area of copper- cored flexible conductor shall be the same as that of the power line introduced into the luminaire... 70
18.2 General Item ... 71
19 Installation of Special Luminaire ... 74
19.1 Dominant Item ... 74
19.1.6 The installation of landscape lighting luminaires shall meet the following requirements: ... 75
19.2 General Item ... 76
20 Installation of Switch, Socket and Fan ... 79
20.1 Dominant Item ... 79
20.1.3 Socket wiring shall meet the following requirements: ... 79
20.2 General Item ... 80
21 Power Test Run of Building Lighting ... 83
21.1 Dominant Item ... 83
22 Installation of Earthing Device ... 84
22.1 Dominant Item ... 84
22.2 General Item ... 84
Code for Acceptance of Construction Quality of Building
Electrical Engineering
1 General Provisions
1.1.1 This code is formulated with a view to strengthening the quality management of construction engineering, unifying the construction quality acceptance of building electrical engineering and ensuring the engineering quality.
1.1.2 This code is applicable to the construction quality acceptance of building electrical installation project with voltage class of 35kV or below.
1.1.3 Building electrical engineering construction quality acceptance shall meet those specified in this code as well as the current relevant ones of the nation. subjected to site acceptance, and acceptance record shall be kept and acceptance data shall be filed. In case there are technical parameter requirements for design, the technical parameter shall be checked and meet the design requirements.
3.2.2 Products with production license or compulsory certification (CCC certification) shall be provided with license No. or CCC certification mark, and certification scope, effectiveness and authenticity of production license or CCC certificate shall be randomly inspected. 3.2.3 Technical documents for installation, application, maintenance and test requirements shall be provided in case of site acceptance of new type electrical equipment, instrument and materials.
3.2.4 As for site acceptance of imported electrical equipment, instrument or materials, quality certificate, performance test report as well as technical documents for installation, application, maintenance and test requirements shall be provided; as for imported electrical equipment with commodity inspection requirements, commodity inspection certificate shall also be provided.
3.2.5 In case on-site sampling inspection is carried out for site acceptance of main equipment, materials, finished product and semi-finished products or sampling inspection is carried out in qualified laboratory due to disagreement, the following requirements shall be met:
1 On-site sampling inspection: as for busway, conduit, insulated wire and cable of the same manufacturer, lot, model and specification, at least 1 sample shall be taken out from each lot; as for such electrical equipment as luminaire, socket and switch of the same manufacturer, material and type, 3% of each shall be sampled for inspection; as for luminaire with storage battery, 5% of them shall be sampled for inspection, and the inspection quantity shall not be less than 1 piece (set).
2 Sampling inspection carried out in qualified laboratory due to disagreement: as for busway, insulated wire, cable, ladder, tray, trunking, conduit, profile steel and galvanized product of the same manufacturer and lot but different specification, 10 % shall be subjected to sampling inspection and the quantity of specification of the inspected product shall not be less than 2; as for such electrical equipment as luminaire, socket and switch of the same manufacturer, material and type, in case the quantity is 500 pieces (sets) or below, 2 pieces (sets) shall be subjected to sampling inspection, and the quantity for sampling inspection for each shall at least be 2 pieces (sets), in case the quantity is more than 500, 3 pieces (sets) shall be subjected to sampling inspection.
3 As for multiple unit works included in the same construction project constructed by the same construction organization, in case main equipment, materials, finished product and semi-finished products of the same manufacturer, material, lot and type are used, the sampling ratio shall be calculated in a combined way.
4 In case of unqualified sampling inspection results, the sampling quantity for inspection may be doubled, in case there is still unqualified result, this lot of equipment, materials, finished products or semi-finished products shall be judged as unqualified products and shall not be used.
5 There shall be test report.
3.2.6 As for site acceptance of transformer, box-type substation, high-voltage electric equipment and electrical porcelain products, the following contents shall be covered: 1 Inspect quality certificate and accompanying technical documents: transformer shall be provided with end-of-manufacturing test records;
2 Appearance inspection: the equipment shall possess nameplate, the surface coating shall be integral, the accessories shall be complete, the insulating piece shall be free from defect or crack, the part for oil charging shall be free from leakage, and the air pressure indication of charging high-pressure equipment shall be normal.
3.2.7 Site acceptance of high-voltage complete-set distribution cabinet, storage battery cabinet, UPS cabinet, EPS cabinet, complete set low-voltage distribution cabinet (box) and control cabinet (console, box) shall meet the following requirements:
1 Inspect quality certificate and accompanying technical documents: such complete set of cabinets as complete set high-voltage and low-voltage distribution cabinets, storage battery cabinet, UPS cabinet and EPS cabinet shall possess end-of-manufacturing test report; 2 Check product model and product technical parameter: they shall meet the design requirements;
3 Appearance inspection: the equipment shall possess nameplate, the surface coating shall be integral without visible collision dents, the elements and components in the equipment shall be intact and the wiring shall be free from shedding or sealing-off, the material and specification of insulated wire shall meet the design requirements, the battery case in storage battery cabinet shall be free from fragmentation or leakage, and the oil-filled equipment and the charging equipment shall be free from leakage.
3.2.8 Site acceptance of diesel power generating set shall include the following contents: 1 Check host, accessories special tools, spare parts and accompanying technical documents: quality certificate and end-of-manufacturing test run records shall be complete and integral, and generator and its control cabinet shall possess end-of-manufacturing test records. 2 Appearance inspection: the equipment shall possess nameplate; the coating shall be intact and the body shall be free from missing part.
3.2.9 As for site acceptance of electromotor, electrical heater, electric actuating machine and low-voltage switchgear, the following contents shall be covered:
1 Inspect quality certificate and accompanying technical documents: the filled contents shall be complete and intact;
2 Appearance inspection: the equipment shall possess nameplate; the coating shall be intact and the equipment components or accessories shall be complete and intact without defect.
3.2.10 Site acceptance of lighting fixture and accessories shall meet the following requirements:
1 Inspect quality certificate: the quality certificate contents shall be complete and intact, the luminaire material shall meet the design requirements and product standard requirements; gas discharge lamp of new type shall be accompanied by technical documents accompanying technical documents; the test data for such functions of internal short loop protection, overload protection, back discharge protection and polarity reverse connection protection of solar luminaire shall be complete and meet the design requirements.
2 Appearance inspection:
1) Luminaire coating shall be intact without damage, the accessories shall be complete, exposed-conductive-part of Category I luminaire shall be provided with special PE terminal;
2) Live part and part providing electrical shock protection of fixed luminaire shall be well, and the identification shall be complete. The insulated wire or cable insulation layer sampled for inspection shall be intact with uniform thickness; the cable shall be free from flattening or distortion; the armour shall be free from loose coil; insulated wire and cable outer sheath shall possess visible identification and manufacturer mark. 3 Inspect insulation performance: insulation performance of wire and cable shall meet those specified in product technical standards or product technical documents. 4 Inspect nominal sectional area and resistance value: nominal sectional area of insulated wire and cable shall meet the design requirements, and their conductor resistance values shall meet the requirements of the current national standard Conductors of Insulated Cables (GB/T 3956).In case of disagreement about conductivity, insulation performance, insulation thickness, mechanical performance as well as flame-retardant and fire performance of insulated wire and cable, the corresponding products shall be sampled by lot and sent to qualified laboratory for inspection. Inspection item and content shall meet those specified in relevant current product standards of the nation.
3.2.13 Site acceptance of conduit shall meet the following requirements: 1 Inspect quality certificate: steel conduit shall possess product quality certificate, and plastic conduit shall possess quality certificate and corresponding test report. 2 Appearance inspection: steel conduit shall be free from flattening with smooth inner wall; non-galvanized steel conduit shall be free from corrosion with intact coating; galvanized steel conduit plating shall be intact, and its surface shall be free from rust stain; plastic conduit and accessories shall be free from fragmentation and the surface shall be provided with flame-retardant mark and manufacturer mark.
3 Diameter, wall thickness and uniformity of conduit shall be sampled by lot and inspected and shall meet those specified in relevant current product standards of the nation. 4 In case of disagreement about electrical continuity of steel conduit of mechanical connection and its accessories, inspection shall be conducted according to those specified in current national standard Conduit Systems for Electrical Installations (GB 20041). 5 In case of disagreement about flame-retardant performance of plastic conduit and accessories, the corresponding products shall be sampled by lot and sent to qualified laboratory for inspection.
3.2.14 Site acceptance of profile steel and welding electrode shall meet the following requirements:
1 Inspect quality certificate and material quality certificate: in case of disagreement, the corresponding products shall be sampled by lot and sent to qualified laboratory for inspection;
2 Appearance inspection: profile steel surface shall be free from severe corrosion, serious distortion, buckling and deformation; welding electrode packaging shall be intact; rust stain at electrode end shall not be found in unpacking inspection.
3.2.15 Site acceptance of galvanized metal product shall meet the following requirements: 1 Inspect product quality certificate: the conformance shall be inspected according to the design requirements;
2 Appearance inspection: zinc coating shall cover integrally, the surface shall be free from rust stain, and hardware fittings and accessories shall be complete without sand hole; 3 As for hot-dip galvanized steel embedded into soil, the zinc coating thickness shall be inspected and shall not be less than 63??m;
4 In case of disagreement about zinc coating quality, the corresponding products shall be sampled by lot and sent to qualified laboratory for inspection.
3.2.16 Site acceptance of ladder, tray and trunking shall meet the following requirements: 1 Inspect quality certificate and end-of-manufacturing inspection report: the filled contents shall be complete and intact;
2 Appearance inspection: the accessories shall be complete, and the surface shall be smooth without deformation; coatings of steel ladder, tray and trunking shall be intact without corrosion; plastic trunking shall be free from damage and shall be uniform in color; in case of disagreement about flame-retardant performance, the corresponding products shall be sampled by lot and sent to qualified laboratory for inspection; coatings of aluminum alloy ladder, tray and trunking shall be intact without torsional deformation, flattening or surface scratch. 3.2.17 Site acceptance of busway shall meet the following requirements: 1 Inspect quality certificate and accompanying installation technical documents which shall meet the following requirements:
1) Technical parameters in CCC type test report shall meet the design requirements; conductor specification and corresponding temperature rise value shall be consistent with conductor specification in CCC type test report; in case of disagreement about current-carrying capacity of conductor, corresponding products shall be send to qualified laboratory for ultimate temperature rise test; the temperature rise of rated current shall meet those specified in relevant current product standards of the nation;
2) As for fire-resistant busway, it shall pass the CCC certification and be provided with type inspection report issued by state-approved testing organization, and its fire resistance period shall meet the design requirements;
3) Protective earthing conductor (PE) shall be reliably connected to enclosure, the sectional area shall meet the requirements of product technical documents; in case the enclosure also serves as protective earthing conductor (PE), CCC type test report and product structure shall meet those specified in relevant current product standards of the nation. 2 Appearance inspection: sealed against moisture shall be in good condition, serial number of each section shall be marked clearly, accessories shall be complete without defect, enclosure shall be free from obvious deformation, busbar bolt overlap surface shall be flat and smooth, plating coverage shall be intact without peeling and pitted surface; fixed contact on plug-in busway shall be free from defect, with smooth surface and intact plating; as for busway with requirements on protection grade, protection grade of product and accessories as well as design conformance shall be inspected, and the identification shall be intact. 3.2.18 Site acceptance of cable head, component, wire connection device and wiring terminal shall meet the following requirements:
1 Inspect quality certificate and related technical documents which shall meet the following requirements:
1) Aluminium and aluminium alloy cable accessory shall be provided with inspection report matched with cable conductor;
2) Fire resistance grade of intermediate connecting accessories of mineral insulated cables shall not be inferior to that of the cable;
3) Rated voltage, connection capacity and protection grade of wire connection device and wiring terminal shall meet the design requirements:
2 Appearance inspection: components shall be complete, package identification and board shall meet the design requirements, wiring shall be correct and handover test shall be passed.
3.3.3 Before wiring of electromotor, electrical heater and electric actuating machine, they shall be connected to mechanical equipment and meet the process requirement subjecting to manual operation, and the insulation resistance shall be tested and regarded as qualified. 3.3.4 Diesel power generating set installation shall meet the following requirements: 1 Before diesel power generating set installation, foundation shall pass the acceptance. 2 After...

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