1.0.1 This code is drawn up for the design of low-voltage electrical distribution to implement the national techno-economic policy so as to safeguard the human body and safety, ensure reliable distribution and qualification of electric energy, save electric energy , and ensure technical advancement, rational economy , and convenience of installation and maintenance.
1.0.2 This code is suitable for the design of the new and expansion works for low- voltage electrical distribution of AC and low-voltage below 500V.
1.0.3 The design of low-voltage electrical distribution shall save non-ferrous metal and rationally select conductors of copper and aluminum materials.
1.0.4 The design of low-voltage electrical distribution, besides the implementation of this code, shall further conform to the stipulations of the current national standards and codes.
1 General
2 Selection of electrical appliances and conductors
2.1 Selection of electrical appliances
2.2 Selection of conductors
3 Arrangement of distribution equipment
3.1 General provisions
3.2 Safety measures in arrangement of distribution equipment
3.3 Requirement on the building
4 Protection of distribution line
4.1 General provisions
4.2 Protection of short circuit
4.3 Protection of over-load
4.4 Protection of earthing fault
(Ⅰ) General provisions
(Ⅱ) Earthing fault protection of TN system
(Ⅲ) TT system earthing fault protection
(Ⅳ) IT system earthing fault protection
(Ⅴ) Earthing using leak current action protection
4.5 Set-up position of protecting electrical appliances
5 Laying of distribution line
5.1 General provisions
5.2 Laying of insulated conductor
5.3 Steel cable wiring
5.4 Naked conductor wiring
5.5 Enclosed bus bar wiring
5.6 Cable wiring
(Ⅰ) General provisions
(Ⅱ) Cable laid in indoor
(Ⅲ) Laying of cable in trench or tunnel
(Ⅳ) Buried laying of cable
(Ⅴ) Cable laid in duct
5.7 Shaft wiring
Appendix Ⅰ Explanation of terms
Appendix Ⅱ Explanation of wording for this code
Additional explanation Chief Editorial Unit, Participating
