*******TEXAS NODAL MARKET NOTICE*******

NOTICE DATE: September 29, 2010

NOTICE TYPE: Market Trials

SHORT DESCRIPTION: REMINDER – The 36-Hour Full-System Market and Reliability Test is scheduled to start today, September 29, 2010, at 08:00 CDT

INTENDED AUDIENCE: Qualified Scheduling Entities, QSEs with Resources, Resource Entities, Nodal Accountable Executives, Nodal Transition Project Managers, Market Trial Contacts

DAYS AFFECTED: September 29 – 30, 2010

LONG DESCRIPTION: The 36-Hour Full-System Market and Reliability Test is scheduled to start today, September 29, 2010, beginning at 08:00 CDT. The test is scheduled to run until 20:00 CDT on September 30, 2010.

Market participants should take the following steps:

Ensure that support staff is available to support testing
Dial into the WebEx conference bridge (primary LFC contacts/non-control room personnel):

The WebEx teleconference information has been provided via email to Nodal Project Managers and technical contacts

Prepare your systems for switching Resources to Nodal control when instructed to do so by ERCOT
Follow all instructions from the ERCOT control center and resolve issues as needed throughout the testing period

During the transition from Zonal to Nodal control and from Nodal to Zonal, each participating QSE will receive an individual call from the ERCOT Operator instructing them to switch control from one system to the other. QSEs must not switch to Nodal control until instructed to do so by ERCOT through this call.

ACTION REQUIRED: Please advise operators and other personnel performing Zonal market activities that the necessary support staff will need to be available to support this testing through 20:00 CDT on September 30, 2010.

CONTACT: If you have any questions, please contact either the Market Trials team by email at [log in to unmask] or your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.