This guide provides considerations for the pre-installation@ installation@ inspection@ and testing of Class 1E power@ instrumentation@ and control equipment and systems of a nuclear facility while in the process of installing@ inspecting@ and testing during new construction@ modification@ and maintenance. This guidance is applicable to initial construction@ modification (backfit)@ and maintenance activities. This guide does not apply to periodic testing. Purpose The purpose of this recommended practice is to identify the activities@ instructions@ and attributes that should be considered in the process of installing@ inspecting@ and testing during new construction@ modification@ and maintenance for Class 1E power@ instrumentation@ and control equipment at nuclear facilities.