Summary of November 1, 2010
Nodal Protocol Revisions
(Effective Upon the Nodal Protocol Transition Plan’s Texas
Nodal Market Implementation Date, as prescribed by zonal Protocol
Section 21.12, Process for Transition to Nodal Market Protocol Sections, unless otherwise noted below)
Section 1:
NPRR244 – Clarification of Other Binding Documents
This Nodal Protocol Revision Request (NPRR) clarifies the concept of “Other
Binding Documents” and the revision process to better align with item (j) of the
Public Utility Regulatory Act, T EX .
U TIL .
C ODE A NN . § 39.151 (Vernon 1998 &
Supp. 2007) (PURA), Essential Organizations, and P.U.C.
S UBST . R. 25.503,
Oversight of Wholesale Market Participants, with respect to governing documents that are public and in effect in the ERCOT Region.
Revised Subsection: 1.1
Section 2:
NPRR219 - Resolution of Alignment Items A33, A92, A106, and A150 - TSPs Must
Submit Outages for Resource Owned Equipment and Clarification of Changes in
Status of Transmission Element Postings
This NPRR establishes ERCOT as the responsible Entity that will manage Outage
Scheduler entries for the Generation Resource for Transmission Elements owned by the Resource other than the Outage of the Generation or Load Resource itself.
ERCOT’s obligations in this regard shall terminate upon the implementation of system changes that enable Resource Entity to enter Outages for their
Transmission Facilities in the Outage Scheduler. This NPRR also requires all changes or expected changes in the status of Transmission Facilities to be in the
Outage Scheduler to ensure that all Outages in the Outage Scheduler are provided to the Market Information System (MIS).
Revised Subsection: 2.1
NPRR244 – Clarification of Other Binding Documents
See Section 1 above.
Revised Subsection: 2.1
Section 3:
NPRR219 - Resolution of Alignment Items A33, A92, A106, and A150 - TSPs Must
Submit Outages for Resource Owned Equipment and Clarification of Changes in
Status of Transmission Element Postings
See Section 2 above.
Page 1 of 6

Summary of November 1, 2010
Nodal Protocol Revisions
(Effective Upon the Nodal Protocol Transition Plan’s Texas
Nodal Market Implementation Date, as prescribed by zonal Protocol
Section 21.12, Process for Transition to Nodal Market Protocol Sections, unless otherwise noted below)
Revised Subsection: 3.1.2, 3.1.3.1, 3.1.3.2, 3.1.4.3, 3.1.5.1, 3.3.2.1 [partially greyboxed effective upon system implementation]
NPRR246 - Requirement for Resource Entities to Update Resource Parameters
This NPRR requires Resource Entities to update their Resource Parameters after
Net Dependable Capability tests, reactive capability tests, ERCOT requests, and known data changes to any Resource Parameters.
Revised Subsection: 3.7
NPRR261- Revision of Data Submission Timeline for Network Model
This NPRR removes the three-month summer model and replaces it with individual model packages for each month. This NPRR also separates item (5) of
Section 3.10.4 into three paragraphs for clarification of ERCOT’s requirements.
Revised Subsections: 3.10.1, 3.10.4 [grey-boxed effective upon system implementation]
NPRR273 - Allow Use of the ONTEST Resource Status to Indicate Resource
Startup, Shutdown and Test Operations
This NPRR expands the use of the Generation Resource Status of ONTEST to provide for Generation Resource operations during start up and shut down of the unit as well as unit testing requirements .
Revised Subsections: 3.9.1, 3.9.2
NPRR284 – Cost Allocation Zones as They Relate to NOIE Load Zones – As Built
Systems
This NPRR changes the Cost Allocation Load Zone assignment for NOIE Load
Zones to a single 2003 Congestion Management Zone (CMZ) for Nodal go-live.
Revised Subsection: 3.4.3
Page 2 of 6

Summary of November 1, 2010
Nodal Protocol Revisions
(Effective Upon the Nodal Protocol Transition Plan’s Texas
Nodal Market Implementation Date, as prescribed by zonal Protocol
Section 21.12, Process for Transition to Nodal Market Protocol Sections, unless otherwise noted below)
Section 4:
NPRR255 - Resolution of Alignment Item A81 - DRUC Timing and Execution when
DAM is Delayed or Aborted
This NPRR adds new Section 5.2.2 to describe the process that ERCOT will follow in the event that the Day-Ahead Market (DAM) is delayed or aborted.
This NPRR resolves alignment items A81 and A139.
Revised Subsection: 4.1.2
NPRR263 - Resolution of Alignment Item A99 - Settlement Point Price Calculation
When Busses are De-energized
This NPRR adds the requirement for ERCOT to assign a Locational Marginal
Price (LMP) for use in the calculation of Day-Ahead and Real-Time Settlement
Point Prices.
Revised Subsection: 4.5.1
NPRR274 - Generic Startup Costs for Combined Cycle Generation Resources –
Removal of Temporal Constraint
This NPRR removes the Startup Offer Generic Cap Resource Categories for
Combined Cycle Generation Resources with less than five hours Off-Line.
Revised Subsection: 4.4.9.2.3
NPRR279 - Resolution of Alignment Item A144 - Clarify Posting of MCPC for
DAM and SASM
This NPRR conforms the Nodal Protocols to the system and business process implementation for posting of prices from the DAM and any Supplemental
Ancillary Services Market (SASM). Reports of clearing prices in the DAM and
SASM will be reviewed and if the potential exists for a change in the prices,
ERCOT will notify Market Participants and describe the nature of the error and any conditions that may have caused the error.
Revised Subsection: 4.5.3
NPRR280 - Move Shift Factor Posting Requirement to Real-Time
This NPRR moves the requirement to post Shift Factor data from the Day-Ahead
Operations section (Section 4.2.3) of the Nodal Protocols as a daily posting to the
Real-Time operations section (Section 6.5.7.1.13) as an hourly posting.
Revised Subsection: 4.2.3
Page 3 of 6

Summary of November 1, 2010
Nodal Protocol Revisions
(Effective Upon the Nodal Protocol Transition Plan’s Texas
Nodal Market Implementation Date, as prescribed by zonal Protocol
Section 21.12, Process for Transition to Nodal Market Protocol Sections, unless otherwise noted below)
Section 5:
NPRR255 - Resolution of Alignment Item A81 - DRUC Timing and Execution when
DAM is Delayed or Aborted
See Section 4 above.
Revised Subsection: 5.2.1, 5.2.2, 5.2.2.1 (new), 5.2.2.2 (new)
NPRR259 - Resolution of Alignment Items A175 and A176 - Settlement of
Generation Resources Dispatched to Meet System Reliability Requirements
This NPRR clarifies that all commitments of a specific Generation Resource in response to an ERCOT Dispatch Instruction (whether issued electronically or verbally) for the commitment of that Generation Resource will be considered to be a Reliability Unit Commitment (RUC) and will be settled in accordance with the RUC Settlement provisions described in the Nodal Protocols.
Revised Subsection: 5.1
Section 6:
NPRR219 - Resolution of Alignment Items A33, A92, A106, and A150 - TSPs Must
Submit Outages for Resource Owned Equipment and Clarification of Changes in
Status of Transmission Element Postings
See Section 2 above.
Revised Subsection: 6.3.2
NPRR259 - Resolution of Alignment Items A175 and A176 - Settlement of
Generation Resources Dispatched to Meet System Reliability Requirements
See Section 5 above.
Revised Subsection: 6.5.9.4.1
NPRR263 - Resolution of Alignment Item A99 - Settlement Point Price Calculation
When Busses are De-energized
See Section 4 above.
Revised Subsection: 6.6.1
Page 4 of 6

Summary of November 1, 2010
Nodal Protocol Revisions
(Effective Upon the Nodal Protocol Transition Plan’s Texas
Nodal Market Implementation Date, as prescribed by zonal Protocol
Section 21.12, Process for Transition to Nodal Market Protocol Sections, unless otherwise noted below)
NPRR273 - Allow Use of the ONTEST Resource Status to Indicate Resource
Startup, Shutdown and Test Operations
See Section 3 above.
Revised Subsections: 6.4.2.4, 6.4.3, 6.5.7.8, 6.6.5
NPRR279 - Resolution of Alignment Item A144 - Clarify Posting of MCPC for
DAM and SASM
See Section 4 above.
Revised Subsections: 6.3, 6.4.8.2.3
NPRR280 - Move Shift Factor Posting Requirement to Real-Time
See Section 4 above.
Revised Subsection: 6.5.7.1.13
Section 8:
NPRR219 - Resolution of Alignment Items A33, A92, A106, and A150 - TSPs Must
Submit Outages for Resource Owned Equipment and Clarification of Changes in
Status of Transmission Element Postings
See Section 2 above.
Revised Subsection: 8.3 [partially grey-boxed effective upon system implementation]
Section 9:
NPRR253 - CRR Balancing Account Invoice and Settlement and Billing Dispute
Process
This NPRR updates Section 9.12 and Section 9.14 with information pertaining to the ERCOT Invoice process and the statuses for processing of disputes.
Page 5 of 6

Summary of November 1, 2010
Nodal Protocol Revisions
(Effective Upon the Nodal Protocol Transition Plan’s Texas
Nodal Market Implementation Date, as prescribed by zonal Protocol
Section 21.12, Process for Transition to Nodal Market Protocol Sections, unless otherwise noted below)
Revised Subsections: 9.12, 9.14.1, 9.14.2, 9.14.3, 9.14.4, 9.14.4.1.3, 9.14.4.1.4,
9.14.4.1.4 (new), 9.14.4.1.5, 9.14.4.2.1, 9.14.4.3 (delete)
NPRR262 - Protocol Synchronization for Nodal Implementation Surcharge
This NPRR modifies the Nodal Implementation Surcharge (NIS) calculation to mirror the existing zonal calculation, by including generation from Non-Modeled
Generators and energy imported into the ERCOT System during a declared
Emergency Condition through each Direct Current Tie (DC Tie) in response to an
ERCOT Dispatch Instruction.
Revised Subsection: 9.16.4
Section 12:
NPRR244 – Clarification of Other Binding Documents
See Section 1 above.
Revised Subsection: 12.2 [partially grey-boxed effective upon system implementation]
ERCOT Fee Schedule:
Docket No. 36851, Application of the Electric Reliability Council of Texas, Inc. for
Approval of a Revised Nodal Market Implementation Surcharge (October 14, 2009)
(Final Order)
The Public Utility Commission of Texas (PUCT) approved the requested revised Nodal
Implementation Surcharge amount of $0.375/MWh, effective January 1, 2010.
Revised Attachment: ERCOT Fee Schedule
Page 6 of 6