Foreword

Specification for construction quality checkout and evaluation of electric equipment installation is a series of standards applied to quality checkout，acceptance and evaluation of electric equipment installation engineering.

The set of standards comprised of the following 17 parts：

—Part 1：General rules；

—Part 2：High-voltage electric equipments；

—Part 3：Power transformers，oil-immersed type reactors and instrument transformers；

—Part 4：Busbar equipments；

—Part 5：Power cable lines；

—Part 6：Grounding devices；

—Part 7：Rotating electrical machines；

—Part 8：Panels，cabinets and secondary circuit wirings；

—Part 9：Batteries；

—Part 10：35kV and below over-head power line installation；

—Part 11：Elevator；

—Part 12：Low-voltage apparatus；

—Part 13：Power converter equipments；

—Part 14：Cranes；

—Part 15：Electric equipments in explosive or inflammable hazardous environment；

—Part 16：1kV and under feeder cable engineering；

—Part 17：Electric lighting devices.

This part is the twelfth part of this series of standards，which was drafted according to the document of Notice on Project ConFastnessation of Formulating and Revising Professional Standards of Electric Power in 1999（Electric Power〔1999〕No.40）issued by the Electric Power Department of the State Economy and Trade Commission.

This part is a tabular form of GB 50254-1996 Electric equipment installation engineering code for construction and acceptance of low-voltage apparatus，and other related national standards and professional standards，which is a professional standards applied to quality checkout of low-voltage apparatus construction.

This part is proposed by and under the jurisdiction of Electric Power Construction Research Institute of State Grid.

Chief Development Organization：

　　　　　　Electric Power Construction Research Institute of State Grid

Participating Development Organization：

　　　　　　the First Electric Power Construction Company of Liaoning Province

Chief Drafting Staff：

　　　　　　Liu Qiang　Wu Lifeng

Electric Power Construction Research Institute of State Grid is responsible for the explanation of this part.