2　Normative References

The following normative documents contain the provisions which，through referencein this text，constitute provisions of this specification.For dated references，subsequent amendments（excluding any corrigendum）to，or revision of，any of these publications do not apply.However，parties to agreements based on this rule are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.For undated references，the latest edition of the normative document referred to applies.

GB 5020　Code for Acceptance of Construction Quality of Steel Structures（2001）

GB 50169　Electric Equipment Installation Engineering-Code for Construction and Acceptance of Earth-termination system（1991）

GB 50168　Electric Equipment Installation Engineering-Code for Construction and Acceptance of Cable System（1991）

GB 8923　Rust Grades and Preparation Grades of Steel Surfaces before Application of Paints and Related Products

GB 98　Basic Forms and Sizes of Weld Grooves for Gas Welding，Manual Arc Welding and Gasshielded Arc Welding

GB/T 11345　Method for Manual Ultrasonic Testing and Classification of Testing Results for Ferritic Steel Welds（1989）

GB 11033　Basic Technical Requirements for Power Cable Accessories with Rated Voltages up to 26/35kV

JGJ 81　Technical Specification for Welding of Steel Structure of Building（1991）

JB/T 8144　Technical Requirements of Heat Shrinkable Accessories for Power Cable with Rated Voltages up to 35kV