GB 50054-2011 PDF English
US$145.00 · In stock · Download in 9 secondsGB 50054-2011: Code for design of low voltage electrical installations Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 50054: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 50054-2011 | English | 145 |
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Code for design of low voltage electrical installations
| Valid |
| GB 50054-1995 | English | 919 |
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Code for design of low voltage electrial installations
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GB 50054-2011: Code for design of low voltage electrical installations---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50054-2011
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Code for Design of Low Voltage Electrical
Installations
Issued on: JULY 26, 2011
Implemented on: JUNE 1, 2012
Jointly Issued by Ministry of Housing and Urban-Rural Development of the People's
Republic of China
General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Foreword
According to the requirements of Document Jian Biao [2002] No. 85 issued by the former Ministry
of Construction (MOC)-"Notice on Printing and Publishing the Development and Revision Plan of
National Engineering Construction Standards in 2001~2002", this code was Formulated through
revising "Code for Design of Low Voltage Electrical Installations" GB 50054-95 jointly by China
Electric Design & Research Institute Co., Ltd . and organizations concerned.
During the revision process, this code was reviewed and finalized by the drafting group on the
basis of wide investigation, earnest summary of practical experience and reference to relevant
international standards and foreign advanced standards as well as extensive solicitation for opinions.
This code comprises 7 Chapters and 1 Appendix. the main technical content includes general
provisions, terms, selection of electrical devices and conductors, layout of switchgear assembly,
protection against electronic shock in electrical installation, protection for power circuits and erection
of wiring systems.
The main technical rev isions are as follows .
1. The applicable voltage was changed from AC SOOY power frequency to AC lOOOV power
frequency;
2. The provision that copper and aluminium conductors shall be selected m the General
Provisions of the former code was cancelled;
3. The terms were added as a separate chapter while the term explanation in the Appendix was
deleted;
4. The requirements for the selection and installation of functional switching devices and
residual current action protection devices were added;
5. The requirements of selecting switching device with neutral pole were added;
6. The requirements of installing electrical devices for insulation monitoring in IT system were
added ;
7. The requirements for selecting sectional area of protective bonding conductor for local
equipotential bonding were added;
8. The "3 .2 Safety Precautions in Layout of Switchgear Assemhly" of "Chapter 3 Layout of
Switchgear Assembly" was incorporated into "4.4 Protection against Ea1th Fault" of "Chapter 4
Protection for Power Circuits" in the former code, and "SELV System, PELV System and FELV
System" were added in "Chapter 5 Protection against Electronic Shock in Electrical Installation";
9. The "Protection against Electrical Fire of Power Circuits" was added in "Protection for
Power Circuits" ;
10. The requirements for "wiring of pliable metal conduit", "wiring of underground concealed
metal trunking", "mineral insulated cable erection" and "pre-branch cable erection" were added;
11 . Supplement, improvement and adjustment were made the partial provisions in the former
Table of Contents
General Provisions ... 1
2 Tenns ... 2
3 Selection of Electrical Devices and Conductors ... 5
3 .1 Selection of Electrical Devices ... 5
3 .2 Selection of Conductors ... 7
4 Layout of Switchgear Assembly ... 13
4.1 General Requirements ... 13
4.2 Safety Precautions in Layout of Switchgear Assembly ... 13
4.3 Requirements for Buildings ... 14
5 Protection Against Electronic Shock in Electrical Installation ... 16
5 .1 Measure for Protection Against Direct Contact ... 16
5 .2 Measure for Protection Against Indirect Contact by Automatic Disconnection of Supply ... 18
5.3 SEILV System And PELV System and FELV System ... 23
6 Protection for Power Circuits ... 26
6.1 General Requirements ... 26
6.2 Protection Against Short Circuit ... 26
6.3 Protection Against Overload ... 28
6.4 Protection Against Electrical Fire of Power Circuits ... 29
7 Erection of Wiring System ... 30
7.1 General Requirements ... 30
7 .2 Wiring of Insulated Conductors ... 31
7.3 Wiring of Suspended Conductors ... 35
7.4 Wiring of Bare Conductors ... 3 6
7 .5 Wiring of Enclosed Busbar ... 3 7
7.6 Wiring ofCables ... 38
7. 7 Wiring of Electric Shaft ... 44
Appendix A Value of Factor k ... 46
Explanation of Wording of This Code ... 49
List of Quoted Standards ... 50
1 General Provisions
1.0.1 This code is Fonnulated with a view to ensuring personal and property safety, energy conservation,
advanced technology, full function, economic rationality, reliable electrical installation as well as
convenient installation and operation in the design of low-voltage electrical installations.
1.0.2 This code is applicable to the design of low-voltage electrical installations at 1 OOOV AC power
frequency in construction, extension and renovation engineering.
1.0.3 The design of low-voltage electrical installations shall not only meet the requirements of this
code, but also comply with those in the current relevant ones of the nation .
2 Terms
2.0.1 Prospective touch voltage
The voltage between conductive paiis which may be touched by human being and animals
simultaneously where they haven't yet touched the conductive parts.
2.1.2 Conventional prospective touch voltage limit
The maximum value of prospective touch voltage which may exist continuously under specified
external influence.
2.0.3 Direct contact
Electrical contact with live pa1i by human being or animals.
2.0.4 Indirect contact
Electrical contact with live exposed conductive part under fault by human being or animals.
2.0.5 Protection against direct contact
Protection against electronic shock under no fault.
2.0.6 Protection against indirect contact
Protection against electronic shock under a single fault.
2.0.6 Additional protection
Protective measures other than protection against direct contact and indirect contact.
2.0.8 Arm's reach
The maximum range where human being can reach with hands, by virtue of no means, in any
direction from any point on the surface where human being usually stands or acts.
2.0.9 Enclosure
The outer cover which can provide protection type and protection grade to adapt to expected
application.
2.0.10 Protective barrier
A barrier for avoiding direct contact from normally possible approaching direction.
2.0.11 Protective obstacle
An obstacle for avoiding unintentional direct contact.
2.0.12 Electrical separation
Protective measures for insulating dangerous Jive parts against other electric loops and electric
components as well as against eaiih, and for avoiding all contacts.
2.0.13 Protective separation
2.0.26 Cable trunking
A closed shell, consisting of a base with movable cover, used for enclosing insulated conductor,
cable and flexible wire.
2.0.26 Cable tray
A cable supporter with continuous chassis and side but without cover.
2.0.28 Cable ladder
A cable supporter with a series of transverse supporting members firmly fixed on longitudinal
main suppotiing components .
2.0.29 Cable brackets
Spaced horizontal cable suppo1iers with only one fixed end.
2.0.30 Mobile equipment
A kind of electrical equipment which is movable during operation or is easy to move from one
position to another position where it is power-connected.
2.0.31 Hand-held equipment
Electrical equipment held in hand(s) during normal use.
2.0.32 Switching device
A device for making or breaking circuits.
2.0.33 Switch
A mechanical switching device which is capable of making, carrying or breaking current under
normal working conditions or under overloading condition as well as capable of carrying current for a
certain period under short-circuit conditions or other abnormal conditions.
2.0.34 Switch-disconnector
A switch capable of satisfying the isolation requirements of an isolator at the disconnected
position.
2.0.35 Device for isolation
A device with isolation function .
2.0.36 Circuit-breaker
A mechanical switching electrical installation which is...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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