TIME OF USE RATES AT THE UNITED ILLUMINATING COMPANY Presented at: Connecticut’s Energy Future December 2, 2004 James D. Lundrigan Pricing Manager The United Illuminating Company

TOU Rates at UI Objectives:  Flatten the load curve  Price the product more correctly in line with the market Commercial & Industrial TOU Rates  Large Power Time of Use  General Service Time of Use Residential Time of Use Rates  Rate A  Rate RT

Large Power Time of Use Time Periods: Summer (June through September)  On Peak – 10AM – 6PM Weekdays  Shoulder – 7AM – 10AM Weekdays and 6PM – 11PM Weekdays  Off Peak – 11PM -7AM Weekdays and all weekend hours Winter (October through May)  On Peak – 10AM – 6PM Weekdays  Shoulder – 7AM – 10AM Weekdays and 6PM – 11PM Weekdays  Off Peak – 11PM -7AM Weekdays and all weekend hours

Large Power Time of Use Kilowatt-Hour Pricing: Summer (June through September)  On Peak – 8.1¢/kWh  Shoulder – 7.9¢/kWh  Off Peak – 7.5¢/kWh Winter (October through May)  On Peak – 6.9¢/kWh  Shoulder – 6.7¢/kWh  Off Peak – 6.5¢/kWh

Large Power Time of Use Demand Pricing: Summer (June through September)  On Peak – $11.94/kW  Shoulder Excess - $1.91/kW  Off Peak Excess - $1.44/kW Winter (October through May)  On Peak – $10.57/kW  Shoulder Excess - $1.91/kW  Off Peak Excess - $1.44/kW

General Service Time of Use Time Periods: Summer (June through September)  On Peak – 10AM to 6 PM Weekdays  Off Peak – 6PM – 10AM Weekdays and all weekend hours Winter (October through May)  On Peak – 10AM to 6 PM Weekdays  Off Peak – 6PM – 10AM Weekdays and all weekend hours

General Service Time of Use Kilowatt-Hour Pricing: Summer (June through September)  On Peak – 13.0¢/kWh  Off Peak – 9.1¢/kWh Winter (October through May)  On Peak – 10.2¢/kWh  Off Peak – 7.7¢/kWh

General Service Time of Use Demand Pricing: Summer (June through September)  On Peak – $7.80/kW  Off Peak Excess - $1.42 Winter (October through May)  On Peak – $6.52/kW  Off Peak Excess - $1.42

Residential Rate A Time Periods: Summer (May through September)  On Peak – 7AM – 11PM  Off Peak – 11PM – 7AM Winter (October through May)  On Peak – 7AM – 11PM  Off Peak – 11PM to 7AM

Residential Rate A Kilowatt-Hour Pricing: Summer (May through September)  On Peak – 14.9¢/kWh  Off Peak – 8.8¢/kWh Winter (October through May)  On Peak – 12.7¢/kWh  Off Peak – 7.8¢/kWh

Residential Rate RT Time Periods: Summer (June through September)  On Peak – 9AM – 8PM weekdays  Off Peak – 8PM – 9AM weekdays and all weekend hours Winter (October through May)  On Peak – 9AM – 8PM weekdays  Off Peak – 8PM – 9AM weekdays and all weekend hours

Residential Rate RT Kilowatt-Hour Pricing: Summer (June through September)  On Peak – 19.7¢/kWh  Off Peak – 10.5¢/kWh Winter (October through May)  On Peak – 15.0¢/kWh  Off Peak – 7.8¢/kWh

How Are They Working? Percentage of Commercial Customers on TOU Rates = 7,375/30,000 or about 24.6% Percentage of Residential Customers on TOU Rates = 35,100/280,000 or about 12.5%