Project 2021-08 Modifications to FAC-008

​​​​​​Related Files​

The comment period for draft one of Reliability Standard FAC-008-6 – Facility Ratings concluded 8 p.m. Eastern, Thursday, October 19, 2023. 
The comments received and ballot results can be accessed via the links below.

The standard drafting team will review all comments received and determine the next steps of the project.

As currently written, the FAC-008 Reliability Standard and associated defined terms “Facility" and “Element" have been interpreted by some to mean that only electrical components may be considered when developing Generator Facility Ratings under R1. This could lead to plannin​​g and operational entities being provided Generator Facility Ratings that are higher than the actual output the plant is capable of, which could be detrimental to reliability during actual system emergencies. Explicitly allowing the inclusion of mechanical elements in the development of Facility Ratings will ensure Generators are rated to their most limiting element.

Further, the FAC-008-3 non-formal use of the term “jointly owned" is ambiguous when compared with the industry legacy use of “jointly owned" as a purely financial and contractual obligation.   This lack of clarity of intent of the standard could cause risk of facility rating gaps, misunderstanding of rating overlap requirements or gaps in facility rating coordination that could be resolved by clearly defining the technical expectations of the term “jointly owned".

Standard(s) Affected: FAC-008-5​

Purpose/Industry Need
The purpose of the proposed project is to produce Generator Owner Facility Ratings that accurately reflect the real power capability of the facility and are therefore useful for reliability-related activities (such as in contingency analysis, SOL determination, etc.).​ 

Additionally, provide clarification around the phrase “jointly owned" and the level of individual component ratings that are required to be shared with the other entity. This will ensure clear expectations are set such that there are no gaps or conflicts between interconnecting entities.​

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DraftActionsDatesResultsConsideration of Comments

Draft 1

Clean | Redline to Last Approved

Implementation Plan​


Supporting Materials

Technical Rationale

Unofficial Comment Form

VRF/VSL Justifications​

Initial Ballots and Non-binding Poll

Ballot Open Reminder​



10/10/2023 - 10/19/2023

Ballot Results

Join Ballot Pools​

9/5/2023 - 10/4/2023

​Comment Period 



​9/5/2023 - 10/19/2023​

Standard Authorization Request
Clean | Redline​
The SC accepted the SAR on September 21, 2022​

Drafting Team Nominations

Supporting Materials

Unofficial Nomination Form (Word) 

Nomination Period

Submit Nominations

12/09/2021 – 1/27/2022

Standard Authorization Request

Supporting Materials

Unofficial Comment Form (Word)

Comment Period


Submit Comments

12/09/2021 – 1/27/2022

​​Comments Received​​​