PECO Technical Standards The ComEd and PECO Transmission Facility Connection Document addresses the requirements for the interconnection to the transmission system within both the ComEd service territory in Illinois and the PECO service territory in Pennsylvania in line with the requirements of NERC Reliability Standard FAC-001. Additional Company standards/requirements as necessary to address site specific interconnection issues are available to the interconnecting customer upon request at any point during the interconnection process. Requests for interconnection to the ComEd/PECO distribution system are addressed in documentation that is available on the respective Company websites which may be accessed via the Exelon website. Date Exelon Mid-Atlantic Interconnection Guidelines PDF 1.29.2026 Exelon Transmission Facility Interconnection Requirements PDF 1.1.2024 Approved Contractor Lists for Design and Execution PDF 2.18.2026 Exelon Utilities Transmission Bus Configuration Design Philosophy PDF 5.19.2021 Historical Standards: PECO | Exelon ZIP