The scope of this guide is to investigate the methods, practices, and requirements of both users and suppliers, and to promogate a systematic and coordinated approach for development of specifications for turnkey substation projects. The purpose of this guide is to develop, for producers and users, methods and procedures for formulating complete specifications for turnkey substations or projects. New IEEE Standard - Superseded. The technical requirements to engineer, design, specify, fabricate, manufacture, furnish,install, test, commission, and provide as-built documents for air-insulated substations are covered.This guide investigates the methods, practices, and requirements of both users and suppliers in order to promogate a systematic and coordinated approach for development of specifications for turn-key substation projects.