IEC指南118:2017(E)面向技术委员会，提供了在准备IEC出版物时如何考虑能源效率方面的指导。 其目的是: -描述IEC出版物对能源效率的贡献； -描述能量效率方面的概念； -提供能源效率方面的类别和供技术委员会审议的能源效率方面的清单。 本指南: -帮助协调提高能源效率的方法； -提高人们对IEC出版物中的规定可能以消极和积极的方式影响产品本身（单独使用）和整个应用（嵌入产品）的能源性能的认识； -帮助技术委员会确定有助于提高产品本身和整个应用程序能效的能效方面；-促进在标准化方面处理能源效率问题时采用系统方法； -促进在标准化背景下处理能源效率方面时使用系统方法。

IEC Guide 118:2017(E) is intended for technical committees and gives guidance on how to consider energy efficiency aspects when preparing IEC publications.
Its purpose is:
- to describe the contributions of IEC publications to energy efficiency;
- to describe the concept of an energy efficiency aspect;
- to provide categories of energy efficiency aspects and a list of energy efficiency aspects to be considered by technical committees.
This Guide:
- helps in harmonizing the approach to energy efficiency;
- raises awareness that provisions in IEC publications can affect the energy performance of the product itself (taken individually) and of the entire application (embedding the product), in both negative and positive ways;
- helps technical committees to identify energy efficiency aspects that contribute to energy efficiency improvement of the product itself and of the entire application;
- promotes the use of a systematic approach when addressing energy efficiency in the context of standardization;
- promotes the use of a systems approach when addressing energy efficiency aspects in the context of standardization.