TALLAHASSE, Fla. -

State regulators are conducting a three-day hearing on annual rate adjustments for Florida's five investor-owned power companies.

The Public Service Commission's hearing on Monday includes adjustments for fuel price changes expected during 2013 for all five companies.

The five-member panel also will hear testimony on costs related to nuclear plant projects that are still in the planning and construction stages for Florida Power & Light Co. and Progress Energy Florida.

In addition, the commissioners will consider adjustments for purchasing power from other sources when plants are shut down for maintenance and repairs as well as conservation and environment costs.

The other regulated utilities are Tampa Electric Co., Gulf Power Co. and Florida Public Utilities Co.