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. The purpose of this guide is to identify the activities, instructions, and attributes that may 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 power stations.Changes to this guide are intended to ⎯ Review and consider "lessons learned" from industry (in particular, for post-modification and postmaintenance testing). ⎯ Provide a more comprehensive, organized "user-friendly" format. ⎯ Review and consider any other related user feedback. Revision Standard - Superseded. 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. This guidance is applicable to initial construction, modification (backfit), and maintenance activities. This guide does not apply to periodic testing.