Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2013 (JIANBIAO [2013] No. 169) issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China, the drafting group has formulated this standard through extensive investigation and study, careful drawing of experience from practices, and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
Main contents of this standard are as follows: general provisions, terms, basic requirements, transportation and storage of cables and accessories, construction of cable line auxiliary facilities, cable laying, installation of cable accessories, construction of cable line fireproofing facilities, engineering succession and acceptance, etc.
Main technical contents revised in this standard are as follows: 1. “Basic requirements” clause is added; 2. some terms in “Terms” clause are deleted, supplemented or modified; 3. the grounding requirements for cable shaft are added; 4. the requirement for bending radius of aluminum alloy cable laying are added; 5. the setting requirements for the identification of city cable line channel are added; 6. the requirements for construction and acceptance of cable tunnel and cable line on-line monitoring system are added; 7. the requirements for construction and acceptance of oil-filled paper insulation cable are deleted; 8. technical standards such as the buried depth of cable duct, the number of layers of cables laid on bearer and tray are adjusted.
These provisions printed in bold type in this standard are compulsory and must be enforced strictly.
The Ministry of Housing and Urban-Rural Development of the People's Republic of China is in charge of the administration of this standard and the explanation of the compulsory provisions; China Electricity Council is responsible for its routine management; China Electric Power Research Institute is responsible for the explanation of specific technical contents. In the process of implementing this standard, the relevant opinions or advices, whenever necessary, can be posted or passed on to China Electric Power Research Institute (Address: No.33, South Binhe Road, Xicheng District, Beijing, 100055, China).
Standard for construction and acceptance of cable line - Electric equipment installation engineering
1 General provisions
1.0.1 This standard is formulated with a view to ensuring the construction quality of cable line engineering, unifying the construction and acceptance criteria, and standardizing the quality control requirements and acceptance conditions during the construction.
1.0.2 This standard is applicable to the construction and acceptance of cable lines with rated voltage of 500kV and below and their auxiliary facilities.
1.0.3 The installation engineering of cable lines with special requirements such as those used in mines, vessels, seabed, metallurgy, chemical industry, etc. shall also meet the relevant requirements of relevant professional standards.
1.0.4 The construction and acceptance of cable line shall meet the requirements specified in this standard and those in relevant current national standards.
2 Terms
2.0.1 cable line
whole system consisting of cables, accessories, auxiliary equipment and auxiliary facilities
2.0.2 metallic sheath
metallic tubular cladding layer in uniform and continuous sealing
2.0.3 armour
cladding layer composed of metallic tape or metallic wire, which is generally used to protect cables from external mechanical force
2.0.4 cable termination
device installed at the end of a cable to connect the cable to other electric equipment or aerial power transmission line and maintain insulation up to the connection point
2.0.5 cable joint
device used for connecting cable to its conductor, insulation layer, shield and protective layer to realize continuous cable line
2.0.6 flexible joint
intermediate joint made by connecting unarmoured cables under the controllable conditions of factory, which is continuously armoured together with cable
2.0.7 cable dividing box
special electric connection equipment which is used for collecting and dividing cable lines in power distribution system, but is not generally provided with secondary auxiliary configuration such as control measurement
2.0.8 cable tunnel and cable line on-line monitoring system
system used for monitoring, analyzing, assisting in diagnosis, alarming and remotely controlling cable operating state and line facilities such as cable tunnel, which consists of field equipment, sensor, signal collection unit, monitoring host, monitoring substation and remote monitoring center
2.0.9 cable ducts
duct which is used to protect cable body laid inside and pull the cable out for replacement in case of cable fault, including single duct and rack duct
2.0.10 cable bearer
device usually formed by integral casting, welding of profiles or connection and assembling of fasteners for a purpose of supporting and fixing the cables
2.0.11 cable tray
continuous rigid structural system composed of straight section, non-straight section, accessories, bearer and hanger of tray (bracket) or ladder, for a purpose of supporting the cables
2.0.12 cable buildings
buildings such as cable trench, channel, tunnel, interlayer, vertical (inclined) shaft, and working shaft for laying of cable or placement of accessories
2.0.13 cable accessories
general terms of cable termination, joint and oil-filled cable pressure box
2.0.14 cable auxiliary equipments
general terms of cable line components such as cross-linked box, grounding box, sheath protector and monitoring system
2.0.15 cable auxiliary facilities
general terms of cable line components such as cable duct, bearer, tray and building
3 Basic requirements
3.0.1 Cables, accessories and auxiliary equipment shall meet the requirements of technical documents for product and shall be provided with product identification and qualification certificates.
3.0.2 Technical safety measures shall be taken for the construction of cable lines, and shall meet the requirements of this standard and technical documents for product.
3.0.3 Performances of fasteners such as mechanical strength, corrosion resistance and flame resistance shall meet the requirements of relevant standards. As for steel fasteners, hot-galvanized products or those with equivalent hot galvanizing performance shall be adopted except for anchor bolts.
3.0.4 For cable lines with anti-interference requirements, anti-interference measures shall be taken according to the design requirements.
4 Transportation and storage of cables and accessories
4.0.1 The transportation and storage of cables and accessories shall meet the requirements of technical documents for product to avoid strong vibration, dumping, moisture and corrosion, and the outer surface of the box body and the components in the box shall not be damaged.
4.0.2 The cable and cable drum shall not be damaged during transportation, loading and unloading. The cable drum shall not be laid flat during transportation and storage.
4.0.3 It shall be ensured that the cable drum is firm and cables are wound tightly before the cable drum is transported or rolled. The oil pipe between the oil-filled cable and the pressure oil tank shall be fixed and free of damage. The pressure oil tank shall be firm and its pressure value shall meet the technical requirements for products. The cable drum shall be rolled in the direction indicated by the arrow marked on it or in the winding direction of the cable.
4.0.4 The cables and their accessories shall be inspected according to the following requirements after being delivered to the site:
1 the technical documents for product shall be complete;
2 the rated voltage, model, specification, length and packaging of the cable shall meet the ordering requirements;
3 the cable appearance shall be in good condition and the cable end shall be sealed tightly; in case of any doubt on appearance inspection, judgment or test shall be conducted to see whether it is affected with damp;
4 the accessory components shall be complete and the material quality shall meet the technical requirements for products;
5 the pressure oil tank, oil pipe, valve and pressure gauge of oil-filled cable shall be in good condition.
4.0.5 The storage of cables and related materials shall meet the following requirements:
1 the cables shall be stored in a centralized and classified manner and shall be marked with rated voltage, model, specification and length; channels shall be available between cable drums; the foundation shall be solid and the drum shall be padded where restricted by conditions; the storage place shall be kept ventilated, dry and free of accumulated water;
2 the porcelain sleeve of cable termination shall be provided with measures to prevent mechanical damage during storage;
3 the moisture proof packaging for the insulating materials of cable accessories shall be well sealed; the insulating materials shall be stored and preserved according to the material performance and preservation requirements, and the preservation period shall meet the requirements of technical documents for product;
4 The storage and preservation of fireproofing materials such as fire bulkhead, paint, wrapping tape and plugging materials shall meet the requirements of technical documents for product;
5 the cable trays shall be kept in categories and shall not be deformed.
4.0.6 During the preservation, the cable drum and its package shall be in good condition, the marking shall be complete, and the end sealing shall be tight. The defects, if any, shall be handled promptly. The oil pressure of oil-filled cable shall be inspected regularly and recorded, and it shall not be lower than the lower limit.
Foreword ii 1 General provisions 2 Terms 3 Basic requirements 4 Transportation and storage of cables and accessories 5 Construction of cable line auxiliary facilities 5.1 Processing and laying of cable ducts 5.2 Configuration and installation of cable bearer 5.3 Cable line protection facilities and buildings 6 Cable laying 6.1 General requirements 6.2 Laying of buried cables 6.3 Intraductal cable laying 6.4 Cable laying in cable buildings 6.5 Cable laying on bridge 6.6 Submarine cable laying 6.7 Aerial cable laying 7 Installation of cable accessories 7.1 General requirements 7.2 Installation requirements 7.3 Cable tunnel and cable line on-line monitoring system 8 Construction of cable line fireproofing facilities 9 Engineering succession and acceptance Annex A Commonly used calculation equations for lateral pressure and traction Explanation of wording in this standard List of quoted standards
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2013 (JIANBIAO [2013] No. 169) issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China, the drafting group has formulated this standard through extensive investigation and study, careful drawing of experience from practices, and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
Main contents of this standard are as follows: general provisions, terms, basic requirements, transportation and storage of cables and accessories, construction of cable line auxiliary facilities, cable laying, installation of cable accessories, construction of cable line fireproofing facilities, engineering succession and acceptance, etc.
Main technical contents revised in this standard are as follows: 1. “Basic requirements” clause is added; 2. some terms in “Terms” clause are deleted, supplemented or modified; 3. the grounding requirements for cable shaft are added; 4. the requirement for bending radius of aluminum alloy cable laying are added; 5. the setting requirements for the identification of city cable line channel are added; 6. the requirements for construction and acceptance of cable tunnel and cable line on-line monitoring system are added; 7. the requirements for construction and acceptance of oil-filled paper insulation cable are deleted; 8. technical standards such as the buried depth of cable duct, the number of layers of cables laid on bearer and tray are adjusted.
These provisions printed in bold type in this standard are compulsory and must be enforced strictly.
The Ministry of Housing and Urban-Rural Development of the People's Republic of China is in charge of the administration of this standard and the explanation of the compulsory provisions; China Electricity Council is responsible for its routine management; China Electric Power Research Institute is responsible for the explanation of specific technical contents. In the process of implementing this standard, the relevant opinions or advices, whenever necessary, can be posted or passed on to China Electric Power Research Institute (Address: No.33, South Binhe Road, Xicheng District, Beijing, 100055, China).
Standard for construction and acceptance of cable line - Electric equipment installation engineering
1 General provisions
1.0.1 This standard is formulated with a view to ensuring the construction quality of cable line engineering, unifying the construction and acceptance criteria, and standardizing the quality control requirements and acceptance conditions during the construction.
1.0.2 This standard is applicable to the construction and acceptance of cable lines with rated voltage of 500kV and below and their auxiliary facilities.
1.0.3 The installation engineering of cable lines with special requirements such as those used in mines, vessels, seabed, metallurgy, chemical industry, etc. shall also meet the relevant requirements of relevant professional standards.
1.0.4 The construction and acceptance of cable line shall meet the requirements specified in this standard and those in relevant current national standards.
2 Terms
2.0.1 cable line
whole system consisting of cables, accessories, auxiliary equipment and auxiliary facilities
2.0.2 metallic sheath
metallic tubular cladding layer in uniform and continuous sealing
2.0.3 armour
cladding layer composed of metallic tape or metallic wire, which is generally used to protect cables from external mechanical force
2.0.4 cable termination
device installed at the end of a cable to connect the cable to other electric equipment or aerial power transmission line and maintain insulation up to the connection point
2.0.5 cable joint
device used for connecting cable to its conductor, insulation layer, shield and protective layer to realize continuous cable line
2.0.6 flexible joint
intermediate joint made by connecting unarmoured cables under the controllable conditions of factory, which is continuously armoured together with cable
2.0.7 cable dividing box
special electric connection equipment which is used for collecting and dividing cable lines in power distribution system, but is not generally provided with secondary auxiliary configuration such as control measurement
2.0.8 cable tunnel and cable line on-line monitoring system
system used for monitoring, analyzing, assisting in diagnosis, alarming and remotely controlling cable operating state and line facilities such as cable tunnel, which consists of field equipment, sensor, signal collection unit, monitoring host, monitoring substation and remote monitoring center
2.0.9 cable ducts
duct which is used to protect cable body laid inside and pull the cable out for replacement in case of cable fault, including single duct and rack duct
2.0.10 cable bearer
device usually formed by integral casting, welding of profiles or connection and assembling of fasteners for a purpose of supporting and fixing the cables
2.0.11 cable tray
continuous rigid structural system composed of straight section, non-straight section, accessories, bearer and hanger of tray (bracket) or ladder, for a purpose of supporting the cables
2.0.12 cable buildings
buildings such as cable trench, channel, tunnel, interlayer, vertical (inclined) shaft, and working shaft for laying of cable or placement of accessories
2.0.13 cable accessories
general terms of cable termination, joint and oil-filled cable pressure box
2.0.14 cable auxiliary equipments
general terms of cable line components such as cross-linked box, grounding box, sheath protector and monitoring system
2.0.15 cable auxiliary facilities
general terms of cable line components such as cable duct, bearer, tray and building
3 Basic requirements
3.0.1 Cables, accessories and auxiliary equipment shall meet the requirements of technical documents for product and shall be provided with product identification and qualification certificates.
3.0.2 Technical safety measures shall be taken for the construction of cable lines, and shall meet the requirements of this standard and technical documents for product.
3.0.3 Performances of fasteners such as mechanical strength, corrosion resistance and flame resistance shall meet the requirements of relevant standards. As for steel fasteners, hot-galvanized products or those with equivalent hot galvanizing performance shall be adopted except for anchor bolts.
3.0.4 For cable lines with anti-interference requirements, anti-interference measures shall be taken according to the design requirements.
4 Transportation and storage of cables and accessories
4.0.1 The transportation and storage of cables and accessories shall meet the requirements of technical documents for product to avoid strong vibration, dumping, moisture and corrosion, and the outer surface of the box body and the components in the box shall not be damaged.
4.0.2 The cable and cable drum shall not be damaged during transportation, loading and unloading. The cable drum shall not be laid flat during transportation and storage.
4.0.3 It shall be ensured that the cable drum is firm and cables are wound tightly before the cable drum is transported or rolled. The oil pipe between the oil-filled cable and the pressure oil tank shall be fixed and free of damage. The pressure oil tank shall be firm and its pressure value shall meet the technical requirements for products. The cable drum shall be rolled in the direction indicated by the arrow marked on it or in the winding direction of the cable.
4.0.4 The cables and their accessories shall be inspected according to the following requirements after being delivered to the site:
1 the technical documents for product shall be complete;
2 the rated voltage, model, specification, length and packaging of the cable shall meet the ordering requirements;
3 the cable appearance shall be in good condition and the cable end shall be sealed tightly; in case of any doubt on appearance inspection, judgment or test shall be conducted to see whether it is affected with damp;
4 the accessory components shall be complete and the material quality shall meet the technical requirements for products;
5 the pressure oil tank, oil pipe, valve and pressure gauge of oil-filled cable shall be in good condition.
4.0.5 The storage of cables and related materials shall meet the following requirements:
1 the cables shall be stored in a centralized and classified manner and shall be marked with rated voltage, model, specification and length; channels shall be available between cable drums; the foundation shall be solid and the drum shall be padded where restricted by conditions; the storage place shall be kept ventilated, dry and free of accumulated water;
2 the porcelain sleeve of cable termination shall be provided with measures to prevent mechanical damage during storage;
3 the moisture proof packaging for the insulating materials of cable accessories shall be well sealed; the insulating materials shall be stored and preserved according to the material performance and preservation requirements, and the preservation period shall meet the requirements of technical documents for product;
4 The storage and preservation of fireproofing materials such as fire bulkhead, paint, wrapping tape and plugging materials shall meet the requirements of technical documents for product;
5 the cable trays shall be kept in categories and shall not be deformed.
4.0.6 During the preservation, the cable drum and its package shall be in good condition, the marking shall be complete, and the end sealing shall be tight. The defects, if any, shall be handled promptly. The oil pressure of oil-filled cable shall be inspected regularly and recorded, and it shall not be lower than the lower limit.
Contents of GB 50168-2018
Foreword ii
1 General provisions
2 Terms
3 Basic requirements
4 Transportation and storage of cables and accessories
5 Construction of cable line auxiliary facilities
5.1 Processing and laying of cable ducts
5.2 Configuration and installation of cable bearer
5.3 Cable line protection facilities and buildings
6 Cable laying
6.1 General requirements
6.2 Laying of buried cables
6.3 Intraductal cable laying
6.4 Cable laying in cable buildings
6.5 Cable laying on bridge
6.6 Submarine cable laying
6.7 Aerial cable laying
7 Installation of cable accessories
7.1 General requirements
7.2 Installation requirements
7.3 Cable tunnel and cable line on-line monitoring system
8 Construction of cable line fireproofing facilities
9 Engineering succession and acceptance
Annex A Commonly used calculation equations for lateral pressure and traction
Explanation of wording in this standard
List of quoted standards
