Common use of Design Standard Clause in Contracts

Design Standard. The System Upgrade Facilities and related facilities to be constructed by TrAILCo (or by Penelec on behalf of TrAILCo), with the exception of the 345 kV Line Loop work, will be designed to meet the following requirements:  FirstEnergy Transmission Planning Criteria  FirstEnergy Requirements for Transmission Connected Facilities  FirstEnergy Transmission System Protection Practices  FirstEnergy Substation Design Standards Manual  Power Circuit Breakers 23 kV through 500 kV (“FE-BKR-1”)  Open Rack Power Capacitors (“FE-CAP-1”)  Liquid Immersed Substation Power & GSU Transformers (“FE-TR-1”) Effective Date: 8/8/2015 - Docket #: ER15-2398-000 - Page 00 XXXXXXXX X – MILESTONES In accordance with Article 5.1 of this Agreement, the following milestone dates shall apply to the designated performance:

Design Standard. The System Upgrade Facilities and related facilities to be constructed by TrAILCo (or by Penelec on behalf of TrAILCo), with the exception of the 345 kV Line Loop work, will be designed to meet the following requirements:  • FirstEnergy Transmission Planning Criteria  • FirstEnergy Requirements for Transmission Connected Facilities  • FirstEnergy Transmission System Protection Practices  • FirstEnergy Substation Design Standards Manual  • Power Circuit Breakers 23 kV through 500 kV (“FE-BKR-1”)  • Open Rack Power Capacitors (“FE-CAP-1”)  • Liquid Immersed Substation Power & GSU Transformers (“FE-TR-1”) Effective Date: 8/8/2015 - Docket #: ER15SERVICE AGREEMENT NO. 2232 Figure 1 Simplified One-2398-000 - Page 00 XXXXXXXX X Line Diagram SERVICE AGREEMENT NO. 2232 APPENDIX B – MILESTONES In accordance with Article 5.1 of this Agreement, the following milestone dates shall apply to the designated performance:

Design Standard. The System Upgrade Facilities and related facilities to be constructed by TrAILCo (or by Penelec on behalf of TrAILCo), with the exception of the 345 kV Line Loop work, will be designed to meet the following requirements:  • FirstEnergy Transmission Planning Criteria  • FirstEnergy Requirements for Transmission Connected Facilities  • FirstEnergy Transmission System Protection Practices  • FirstEnergy Substation Design Standards Manual  • Power Circuit Breakers 23 kV through 500 kV (“FE-BKR-1”)  • Open Rack Power Capacitors (“FE-CAP-1”)  • Liquid Immersed Substation Power & GSU Transformers (“FE-TR-1”) Effective Date: 8/8/2015 - Docket #: ER15Figure 1 Simplified One-2398-000 - Page 00 Line Diagram XXXXXXXX X – MILESTONES In accordance with Article 5.1 of this Agreement, the following milestone dates shall apply to the designated performance:

Design Standard. The System Upgrade Facilities and related facilities to be constructed by TrAILCo (or by Penelec on behalf of TrAILCo), with the exception of the 345 kV Line Loop work, will be designed to meet the following requirements:  • FirstEnergy Transmission Planning Criteria  • FirstEnergy Requirements for Transmission Connected Facilities  • FirstEnergy Transmission System Protection Practices  • FirstEnergy Substation Design Standards Manual  • Power Circuit Breakers 23 kV through 500 kV (“FE-BKR-1”)  • Open Rack Power Capacitors (“FE-CAP-1”)  • Liquid Immersed Substation Power & GSU Transformers (“FE-TR-1”) Effective Date: 8/8/2015 SERVICE AGREEMENT NO. 2232 Figure 1 Simplified One-Line Diagram 84 SERVICE AGREEMENT NO. 2232 APPENDIX B - Docket #: ER15-2398-000 - Page 00 XXXXXXXX X – MILESTONES In accordance with Article 5.1 of this Agreement, the following milestone dates shall apply to the designated performance: