Contents
1 General Provisions
2 Terms
3 Selection of Electrical Devices and Conductors
3.1 Selection of Electrical Devices
3.2 Selection of Conductors
4 Layout of Switchgear Assembly
4.1 General Requirements
4.2 Safety Precautions in Layout of Switchgear Assembly
4.3 Requirements for Buildings
5 Protection Against Electronic Shock in Electrical Installation
5.1 Measure for Protection against Direct Contact
5.2 Measure for Protection against Indirect Contact by Automatic Disconnection of Supply
5.3 SEILV System And PELV System and FELV System
6 Protection for Power Circuits
6.1 General Requirements
6.2 Protection against Short Circuit
6.3 Protection against Overload
6.4 Protection against Electrical Fire of Power Circuits
7 Erection of Wiring System
7.1 General Requirements
7.2 Wiring of Insulated Conductors
7.3 Wiring of Suspended Conductors
7.4 Wiring of Bare Conductors
7.5 Wiring of Enclosed Busbar
7.6 Wiring of Cables
7.7 Wiring of Electric Shaft
Appendix A Value of Factor k
Explanation of Wording in This Code
List of Quoted Standards
Code for Design of Low Voltage Electrical Installations
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1 General Provisions
1.0.1 This code is formulated 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 1000V 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 parts 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 part 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
