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GB 50303-2015: Code for acceptance of construction quality of building electrical engineering
GB 50303-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S 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’s
Republic of China;
General Administration of Quality Supervision, Inspection and
Quarantine of the People’s 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 piec...