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Regulatory Information - Open Access

Open Access Information

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On this page you will find information on SCE's tariffs for wholesale customers under the jurisdiction of the Federal Energy Regulatory Commission (FERC): the Transmission Owner Tariff and the Wholesale Distribution Access Tariff.

The Transmission Owner Tariff provides, in conjunction with the California Independent System Operator ("CAISO") tariff, certain terms and conditions for service utilizing SCE's transmission facilities that have been turned over to the operational control of the CAISO.
The Wholesale Distribution Access Tariff provides the terms and conditions for service utilizing SCE's distribution facilities that are under its operational control.

In this section, SCE posts its currently effective rates for transmission service and formula transmission rate information.

Attention: Information regarding SCE's generation interconnection process (including application forms, interconnection queue and circuit maps) has been moved. Please visit the SCE's interconnection webpage at: on.sce.com/gridinterconnections.

SCE Transmission Owner Tariff

2019 Transmission Maintenance and Compliance Review (TMCR)

2019 Draft Transmission Maintenance and Compliance Review (TMCR) Report
Transmission Maintenance and Compliance Review Stakeholder Meeting Notice – May 29
2019 Draft TMCR Stakeholder Meeting Presentation – May 29, 2019
Stakeholder comments template – 2019 Draft TMCR
Stakeholder Comments on Draft 2019 TMCR Report
- CPUC
- Six Cities
- NCPA

Transmission Owner Tariff (TOT) Combined - effective June 1, 2019

Title Page, 0.0.0 – effective June 1, 2010
Table of Contents, 2.0.0 – effective January 1, 2016
Section 1, Preamble, 0.0.0 – effective June 1, 2010
Section 2, Effective Date, 0.0.0 – effective June 1, 2010
Section 3, TO Definitions, 1.0.0 – effective January 1, 2018
Section 4, Eligibility, 0.0.0 – effective June 1, 2010
Section 5, Access Charges and Transmission Rates, 2.0.0 – effective January 1, 2018
Section 6, Ancillary Services, 0.0.0 – effective June 1, 2010
Section 7, Billing and Payment, 0.0.0 – effective June 1, 2010
Section 8, Obligation to Interconnect or Construct Transmission Expansion & Facility Upgrades, 1.0.0 – effective June 1, 2010
Section 9, Expansion Process, 0.0.0 – effective June 1, 2010
Section 10, Interconnection Process, 0.0.0 – effective June 1, 2010
Section 11, Uncontrollable Forces and Indemnification, 0.0.0 – effective June 1, 2010
Section 12, Regulatory Filings, 0.0.0 – effective June 1, 2010
Section 13, Creditworthiness, 0.0.0 – effective June 1, 2010
Section 14, Disputes, 0.0.0 – effective June 1, 2010
Section 15, Recovery of Reliability Service Costs, 0.0.0 – effective June 1, 2010
Section 16, Miscellaneous, 0.0.0 – effective June 1, 2010
Appendix I, Transmission Revenue Requirement, 10.0.0 – effective January 1, 2019
Appendix II, Charges for Wholesale Transmission Services, 8.0.0 – effective January 1, 2018
Appendix III, Transmission Rates for End-Use Service, 18.0.0 – effective June 1, 2019
Appendix IV, Rates for Certain Ancillary Service Bids, 0.0.0 – effective June 1, 2010
Appendix V, Notices, 0.0.0 – effective June 1, 2010
Appendix VI, Reliability Services Rate Schedule, 10.0.0 – effective January 1, 2019
Appendix VII, Interconnection Procedures in Effect Prior to July 1, 2005, 0.0.0 – effective June 1, 2010
Appendix VIII, Not Used, 5.0.0 – effective January 1, 2012
Appendix IX, Formula Rate, 0.0.0 – effective January 1, 2012
- Attachment 1 to Appendix IX, Formula Rate, 5.0.0 – effective November 16, 2018
- Attachment 2 to Appendix IX, Formula Rate, 14.10.0 – effective March 1, 2019
Appendix X, Rate Schedule for Recovery of Costs, 1.0.0 – effective January 1, 2018
Appendix XI, Appendix XI - TMCR, 0.1.0 – effective September 1, 2018
Supplemental Documents
- FERC Wholesale Transmission Rates
- FERC Retail Transmission Rates
- FERC Transmission Rate Historical Information
Formula Transmission Rate TO2020 Draft Annual Update - June 14, 2019
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2020
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 14, 2019
- Attachment 4: Workpapers
- Attachment 5: TO2018 True Up TRR (PDF)/ (Excel)
Formula Transmission Rate Filing TO2019A - April 11, 2019
- Volume 1: General Info
- Volume 2: Testimony
- Exhibit SCE-4: Formula Determination of Base TRR (PDF) / (Excel)
- Volume 3: Workpapers
Post Retirement Benefits Other than Pensions (PBOPs) Filing-- March 8, 2019
- Filing Letter
- Attachments
- TO Tariff Revisions
Phase 2 Retail Rate Change Filing – February 28, 2019
- Filing Letter
- TO Tariff Revisions
- Exhibit and Attachment
Formula Transmission Rate TO2019 Annual Update - November 29, 2018
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2019
- Attachment 3: Revision to Formula Rate Inputs Compared to June 15, 2018
- Attachment 4: Workpapers
- Attachment 5: TO13 True Up TRR (PDF)/ (Excel) and Incremental Workpapers
EV Rate Revision Filing - November 20, 2018
- Filing Letter
- TO Tariff Revisions
- Exhibits
TCJA Revision Filing - September 17, 2018
- Filing Letter
- TO Tariff Revisions
- Declarations
Formula Transmission Rate TO2019 Draft Annual Update - June 15, 2018
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2019
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2018
- Attachment 4: Workpapers (1 / 2)
- Attachment 5: TO13 True Up TRR (PDF)/ (Excel) and Incremental Workpapers
Successor Formula Transmission Rate TO2018 - October 27, 2017
- Volume 1: General Info
- Volume 2: Testimony
- Exhibit SCE-4: Formula Determination of Base TRR (PDF) / (Excel)
- Volume 3: Workpapers (1 / 2)
Formula Transmission Rate TO12 Annual Update - October 27, 2017
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2018
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2017
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO12 Draft Annual Update - June 15, 2017
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2018
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2016
- Attachment 4: Workpapers (1 / 2)
Accumulated Deferred Income Taxes (ADIT) Net Operating Loss (NOL) Revision Filing - February 1, 2017
- Filing Letter
- TO Tariff Revisions
Formula Transmission Rate TO11 Annual Update - November 30, 2016
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2017
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2016
- Attachment 4: Workpapers (1 / 2)
Post Retirement Benefits Other than Pensions (PBOPs) Filing--August 16, 2016
- Filing Letter
- Attachment 1: Formula Spreadsheet Schedule 35
- Attachment 2: Actuarial Report for 2015
- TO Tariff Revisions
Formula Transmission Rate TO11 Draft Annual Update - June 15, 2016
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2017
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2016
- Attachment 4: Workpapers (1 / 2)
Retail Rate Revision Filing-Standby Rates - April 13, 2016
- Filing Letter
- Exhibit 1: Affidavit
  - Attachment 1 to Exhibit 1: CPUC Decision 16-03-030 “CPUC Phase 2 Order”
  - Attachment 2 to Exhibit 1: Medium and Large Power Rate Group Rate Design Settlement
- TO Tariff Revisions
Retail Rate Revision Filing-Net Energy Metering – March 30, 2016
- Filing Letter
- Attachment 1: CPUC Decision 16-01-044 “NEM 2.0 Decision”
- Attachment 2: Proposed Schedule 33
- TO Tariff Revisions
Depreciation Update Filing - January 6, 2016
- Filing Letter
- Exhibit A: Affidavit
  - Attachment 1 to Exhibit A: Quantification
- Exhibit B: GRC Order
- Exhibit C: SCE Testimony
- Exhibit D: Annotated SCE Testimony
- TO Tariff Revisions
Formula Transmission Rate TO10 Annual Update - December 1, 2015
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF ) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2016
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 15, 2015
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO10 Draft Annual Update - June 15, 2015
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2016
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 15, 2015
- Attachment 4: Workpapers (1 / 2)
Unfunded Reserves Filing - April 3, 2015
- Filing Letter
- Attachment 1: One Time True Up TRR Adjustment Workpaper (PDF) / (Excel)
- Attachment 2: Revised TO8 Formula Spreadsheet Workpaper (PDF) / (Excel)
- Attachment 3: Revised TO9 Formula Spreadsheet Workpaper (PDF) / (Excel)
- TO Tariff Revisions
Formula Transmission Rate TO9 Annual Update - November 25, 2014
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2015
- Attachment 3: Revisions to Formula Rate Inputs Compared to June 13, 2014
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO8 Amended Annual Update - September 17, 2014
- Filing Letter
- Attachment 1: Formula Determination of Revised 2012 True Up TRR (PDF) / (Excel)
- Attachment 2: Revised Workpapers
- Attachment 3: Revised 2012 True Up TRR Explanation
- Attachment 4:Monthly Comparison of TRR Change
Post Retirement Benefits Other than Pensions (PBOPs) Filing--September 5, 2014
- Filing Letter
- Attachment 1: Formula Spreadsheet Schedule 35
- Attachment 2: Actuarial Report for 2013
- Attachment 3: Proposed Revised Formula Spreadsheet with TO9 Inputs
- Attachment 4: PBOPs Formula Rate Issue Description
- Attachment 5: Formula Spreadsheet
- TO Tariff Revisions
Formula Transmission Rate TO9 Draft Annual Update Revised- July 16, 2014
- Draft Filing Letter
- Explanation of ER08-375 CWIP ROE Change
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2015
- Attachment 4: Revised Workpapers
Formula Transmission Rate TO9 Draft Annual Update - June 13, 2014
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2015
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to June 13, 2014
- Attachment 4: Workpapers (1 / 2)
Formula Transmission Rate TO8 Amended Annual Update (Draft) - June 13, 2014
- Notice of Revision to TO8 Annual Update
- Revised 2012 True Up TRR Explanation
- Attachment 1: Formula Determination of Revised 2012 True Up TRR (PDF) / (Excel )
- Attachment 4: Revised Workpapers
Formula Transmission Rate TO8 Annual Update - November 26, 2013
- Filing Letter
- Attachment 1: Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Retail and Wholesale Transmission Rates Effective January 1, 2014
- Attachment 3: Revisions to Formula Rate Inputs Compared to September 24, 2013
- Attachment 4: Workpapers
Formula Transmission Rate TO8 Draft Annual Update Based on Aug 26, 2013 Offer of Settlement - September 24, 2013
- Draft Filing Letter
- Attachment 1: Draft Formula Determination of Base TRR (PDF) / (Excel)
- Attachment 2: Draft Retail and Wholesale Transmission Rates Effective January 1, 2014
- Attachment 3: Draft Revisions to Formula Rate Inputs Compared to September 24, 2013
- Attachment 4: Workpapers
FERC Formula Rate Settlement - August 26, 2013
- Filing Letter
- Explanatory Statement
- Settlement Offer and Exhibits
- Corrected Exhibits Filing - October 9, 2013
2nd Formula Transmission Rate Draft Informational Filing - June 14, 2013
- Draft Filing Letter
- Draft Formula Determination of Base TRR (PDF) / (ZIP)
- Workpapers
Depreciation Update Filing - April 8, 2013
- Filing Letter and Affidavit
- Attachment
Retail Rate Revision Filing – March 29, 2013
- Filing Letter and Affidavit
- Revised Schedule 33 and Attachments
1st Formula Transmission Rate Informational Filing - September 14, 2012
- Filing Letter & Attachments 2-3
- Formula Determination of Base TRR (PDF)/(ZIP)
- Workpapers
1st Formula Transmission Rate Draft Informational Filing - June 15, 2012
- Draft Filing Letter
- Draft Formula Determination of Base TRR (PDF) / (ZIP)
- Workpapers

SCE Wholesale Distribution Access Tariff

Wholesale Distribution Access Tariff (WDAT) Combined - effective May 30, 2018

Title Page, 0.0.0 – effective May 28, 2010
Table of Contents, 2.0.0 – effective January 1, 2016
Section 1, Preamble and Applicability, 0.0.0 – effective May 28, 2010
Section 2, Definitions, 2.0.0 – effective May 30, 2018
Section 3, Ancillary Services, 0.0.0 – effective May 28, 2010
Section 4, Not Used, 0.0.0 – effective May 28, 2010
Section 5, Billing and Payment, 0.0.0 – effective May 28, 2010
Section 6, Regulatory Filings, 0.0.0 – effective May 28, 2010
Section 7, Uncontrollable Forces and Indemnification, 0.0.0 – effective May 28, 2010
Section 8, Creditworthiness, 0.0.0 – effective May 28, 2010
Section 9, Dispute Resolution, 0.0.0 – effective May 28, 2010
Section 10, Governing Law, 0.0.0 – effective May 28, 2010
Section 11, Not Used, 0.0.0 – effective May 28, 2010
Section 12, Nature of Distribution Service, 2.0.0 – effective May 30, 2018
Section 13, Service Availability, 3.0.0 – effective May 30, 2018
Section 14, Distribution Customer Responsibilities, 0.0.0 – effective May 28, 2010
Section 15, Procedures for Arranging Distribution Service, 3.0.0 – effective May 30, 2018
Section 16, Additional Study Procedures For Distribution Service Re, 0.0.0 – effective May 28, 2010
Section 17, Procedures if the Distribution Provider is Unable to Co, 0.0.0 – effective May 28, 2010
Section 18, Not Used, 0.0.0 – effective May 28, 2010
Section 19, Not Used, 0.0.0 – effective May 28, 2010
Section 20, Metering and Power Factor Correction at the Point of Receipt or the Point of Delivery, 0.0.0 – effective May 28, 2010
Section 21, Compensation for Distribution Service, 0.0.0 – effective May 28, 2010
Section 22, Stranded Cost Recovery, 0.0.0 – effective May 28, 2010
Section 23, Not Used, 0.0.0 – effective May 28, 2010
Section 24, Standards of Conduct, 0.0.0 – effective May 28, 2010
Attachment A Form of Service Agreement for Wholesale Distribution Service, 2.0.0 - effective May 30, 2018
Attachment B Technical and Operational Implementation of the Tariff for Wholesale Distribution Load, 0.0.0- effective May 28, 2010
Attachment C Technical and Operational Implementation of the Tariff for Generation Resources, 1.0.0 - effective May 29, 2017
Attachment D Methodology for Completing a System Impact Study, 0.0.0 - effective May 28, 2010
Attachment E Index of Wholesale Distribution Service Customers, 0.0.0 - effective May 28, 2010
Attachment F Standard Large Generator Interconnection Procedures, 0.0.0 - effective May 28, 2010
Attachment G Standard Small Generator Interconnection Procedures, 1.0.0 - effective October 1, 2014
Attachment H Clustering Large Generator Interconnection Procedures, 0.0.0 - effective May 28, 2010
Attachment I Generator Interconnection Procedures, 11.0.0 - effective May 30, 2018
- Appendix 1 Interconnection Request for a Generating Facility, 4.0.0 - effective May 30, 2018
- Appendix 2 Procedures for Transitioning Interconnection Requests, 1.0.0 - effective March 2, 2011
- Appendix 3 Generator Interconnection Study Process Agreement for Cluster Study Process, 3.0.0 - effective July 29, 2016
- Appendix 4 Independent Study Process Study Agreement, 4.0.0 - effective July 29, 2016
- Appendix 5 Generator Interconnection Agreement CSP, 1.0.0 - effective December 8, 2012
  - Appendix 5.1 Generator Interconnection Agreement CSP for QC4, 2.0.0 - effective October 1, 2014
  - Appendix 5.2 Generator Interconnection Agreement CSP for QC5, 7.0.0 - effective May 30, 2018
- Appendix 6 Generator Interconnection Agreement Independent Study Process, 1.0.0 - effective December 8, 2012
  - Appendix 6.1 Generator Interconnection Agreement ISP for QC4, 2.0.0 - effective October 1, 2014
  - Appendix 6.2 Generator Interconnection Agreement ISP for QC5, 7.0.0 - effective May 30, 2018
- Appendix 7 Generator Interconnection Agreement Fast Track Process, 6.0.0 - effective May 30, 2018
- Appendix 8 Certification Codes and Standards, 1.0.0 - effective January 23, 2017
- Appendix 9 Certification of Small Generator Equipment Packages, 0.0.0 - effective March 2, 2011
- Appendix 10 Application, Procedures, and Terms and Conditions, 2.0.0 - effective January 23, 2017
Attachment J, Rate Schedule for Recovery of Costs, 1.0.0 - effective January 1, 2018

Public WDAT-Rule 21 Queue

Interconnection Queue

SCE- WDAT and Rule 21 Interconnection Requests (Excel)

Financial Security Forms

Interconnection Application Forms

Pre-Application Reports

Contact Us

Should you have any questions regarding SCE's Open Access Information, please contact Karen Koyano in SCE's Regulatory Operations:
Email: Karen.Koyano@sce.com

If you have questions regarding SCE's generation interconnection processes, please use the contact information below:
Email: interconnectionQA@sce.com
Phone: (626) 302-3688

Mailing Address:

Grid Interconnection & Contract Development
Southern California Edison
2244 Walnut Grove Ave
PO Box 945
Rosemead, CA 91770