Common use of Proposed Rates Clause in Contracts

Proposed Rates. T-1 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 Customer Charge $10.13 $10.13 Energy Charge On-Peak kWh x $0.25689 $0.11063 Distrib/Access On-Peak Charge kWh x $0.23648 $0.10894 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Charge kWh x $0.02805 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 Base Bill Subtotal Subtotal Transmission On-Peak Charge kWh x $0.00090 $0.00081 ------------------------------------------------------------------ Retail Fuel & Purchased Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Net Performance Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 Attachment 1 Exhibit 4 Page 23 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 Rate Customers Hours Use: 200 ----------------------------------------------------------------------------------------------------------------------------------- Maximum Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 $27,125.36 $10,970.40 $38,095.76 $27,563.03 $6,720.00 $34,283.03 ($3,812.73) -14.1% -10.0% 300 250 50,000 $68,416.03 $27,426.00 $95,842.03 $69,449.92 $16,800.00 $86,249.92 ($9,592.11) -14.0% -10.0% 1,000 500 100,000 $135,997.58 $54,852.00 $190,849.58 $138,149.00 $33,600.00 $171,749.00 ($19,100.58) -14.0% -10.0% > 1,000 1,000 200,000 $272,545.01 $109,704.00 $382,249.01 $276,792.75 $67,200.00 $343,992.75 ($38,256.26) -14.0% -10.0% > 1,000 1,500 300,000 $406,320.19 $164,556.00 $570,876.19 $412,941.71 $100,800.00 $513,741.71 ($57,134.48) -14.1% -10.0% -----------------------------------------------------------------------------------------------------------------------------------

Proposed Rates. T-1 T-2 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 with Customer Charge with Ratchet kW = First 150 kW $10.13 30.86 $10.13 30.86 Ratchet kW = First 150 kW $27.77 $27.77 < 300 kW $127.37 $127.37 < 300 kW $114.62 $114.62 > 300 kW $185.20 $185.20 > 300 kW $166.67 $166.67 > 1,000 kW $416.22 $416.22 > 1,000 kW $374.57 $374.57 Demand Charge kW x $24.52 $11.45 Distrib/Access Energy Charge On-Peak kWh x $0.25689 0.03975 $0.11063 Distrib/Access On-Peak 0.02757 Demand Charge kWh kW x $0.23648 21.09 $0.10894 9.32 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Transmission ----------------------------------------------------------- Demand Charge kWh kW x $0.02805 0.98 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 0.98 Base Bill Subtotal Subtotal Transmission Distrib/Access Energy Charge On-Peak Charge kWh x $0.00090 0.04890 $0.00081 ------------------------------------------------------------------ 0.03795 Retail Fuel & Purchased Off-Peak kWh x $0.02919 $0.02614 Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Transmission Net Performance Energy Charge On-Peak kWh x $0.00000 $0.00000 Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 Off-Peak kWh x $0.00000 $0.00000 DSM kWh x $0.00381 $0.00381 ------------------------------------------------------------------ ----------------------------------------------------------- Delivery Component Subtotal Subtotal Combined Adjustment Charge $0.04571 $0.04571 Generation Charge On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 123 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 Attachment 1 Exhibit 4 Page 23 27 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 Rate Customers Hours Use: 200 400 ----------------------------------------------------------------------------------------------------------------------------------- Maximum Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 40,000 $27,125.36 32,506.88 $10,970.40 21,940.80 $38,095.76 54,447.68 $27,563.03 35,558.57 $6,720.00 13,440.00 $34,283.03 48,998.57 ($3,812.735,449.11) -14.1-16.8% -10.0% 300 250 50,000 100,000 $68,416.03 81,869.83 $27,426.00 54,852.00 $95,842.03 136,721.83 $69,449.92 89,438.76 $16,800.00 33,600.00 $86,249.92 123,038.76 ($9,592.1113,683.07) -14.0-16.7% -10.0% 1,000 500 100,000 200,000 $135,997.58 162,905.18 $54,852.00 109,704.00 $190,849.58 272,609.18 $138,149.00 178,126.68 $33,600.00 67,200.00 $171,749.00 245,326.68 ($19,100.5827,282.50) -14.0-16.7% -10.0% > 1,000 1,000 200,000 400,000 $272,545.01 326,360.19 $109,704.00 219,408.00 $382,249.01 545,768.19 $276,792.75 356,748.11 $67,200.00 134,400.00 $343,992.75 491,148.11 ($38,256.2654,620.08) -14.0-16.7% -10.0% > 1,000 1,500 300,000 600,000 $406,320.19 487,042.97 $164,556.00 329,112.00 $570,876.19 816,154.97 $412,941.71 532,874.75 $100,800.00 201,600.00 $513,741.71 734,474.75 ($57,134.4881,680.22) -14.1-16.8% -10.0% -----------------------------------------------------------------------------------------------------------------------------------

Proposed Rates. T-1 T-2 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 with Customer Charge with Ratchet kW = First 150 kW $10.13 30.86 $10.13 30.86 Ratchet kW = First 150 kW $27.77 $27.77 < 300 kW $127.37 $127.37 < 300 kW $114.62 $114.62 > 300 kW $185.20 $185.20 > 300 kW $166.67 $166.67 > 1,000 kW $416.22 $416.22 > 1,000 kW $374.57 $374.57 Demand Charge kW x $24.52 $11.45 Distrib/Access Energy Charge On-Peak kWh x $0.25689 0.03975 $0.11063 Distrib/Access On-Peak 0.02757 Demand Charge kWh kW x $0.23648 21.09 $0.10894 9.32 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Transmission ----------------------------------------------------------- Demand Charge kWh kW x $0.02805 0.98 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 0.98 Base Bill Subtotal Subtotal Transmission Distrib/Access Energy Charge On-Peak Charge kWh x $0.00090 0.04890 $0.00081 ------------------------------------------------------------------ 0.03795 Retail Fuel & Purchased Off-Peak kWh x $0.02919 $0.02614 Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Transmission Net Performance Energy Charge On-Peak kWh x $0.00000 $0.00000 Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 Off-Peak kWh x $0.00000 $0.00000 DSM kWh x $0.00381 $0.00381 ------------------------------------------------------------------ ----------------------------------------------------------- Delivery Component Subtotal Subtotal Combined Adjustment Charge $0.04571 $0.04571 Generation Charge On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 124 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 Attachment 1 Exhibit 4 Page 23 28 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 Rate Customers Hours Use: 200 450 ----------------------------------------------------------------------------------------------------------------------------------- Maximum Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 45,000 $27,125.36 33,852.26 $10,970.40 24,683.40 $38,095.76 58,535.66 $27,563.03 37,557.45 $6,720.00 15,120.00 $34,283.03 52,677.45 ($3,812.735,858.21) -14.1-17.3% -10.0% 300 250 50,000 112,500 $68,416.03 85,233.28 $27,426.00 61,708.50 $95,842.03 146,941.78 $69,449.92 94,435.97 $16,800.00 37,800.00 $86,249.92 132,235.97 ($9,592.1114,705.81) -14.0-17.3% -10.0% 1,000 500 100,000 225,000 $135,997.58 169,632.08 $54,852.00 123,417.00 $190,849.58 293,049.08 $138,149.00 188,121.10 $33,600.00 75,600.00 $171,749.00 263,721.10 ($19,100.5829,327.98) -14.0-17.3% -10.0% > 1,000 1,000 200,000 450,000 $272,545.01 339,813.99 $109,704.00 246,834.00 $382,249.01 586,647.99 $276,792.75 376,736.95 $67,200.00 151,200.00 $343,992.75 527,936.95 ($38,256.2658,711.04) -14.0-17.3% -10.0% > 1,000 1,500 300,000 675,000 $406,320.19 507,223.67 $164,556.00 370,251.00 $570,876.19 877,474.67 $412,941.71 562,858.01 $100,800.00 226,800.00 $513,741.71 789,658.01 ($57,134.4887,816.66) -14.1-17.3% -10.0% -----------------------------------------------------------------------------------------------------------------------------------

Proposed Rates. T-1 T-2 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 with Customer Charge with Ratchet kW = First 150 kW $10.13 30.86 $10.13 30.86 Ratchet kW = First 150 kW $27.77 $27.77 < 300 kW $127.37 $127.37 < 300 kW $114.62 $114.62 > 300 kW $185.20 $185.20 > 300 kW $166.67 $166.67 > 1,000 kW $416.22 $416.22 > 1,000 kW $374.57 $374.57 Demand Charge kW x $24.52 $11.45 Distrib/Access Energy Charge On-Peak kWh x $0.25689 0.03975 $0.11063 Distrib/Access On-Peak 0.02757 Demand Charge kWh kW x $0.23648 21.09 $0.10894 9.32 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Transmission ----------------------------------------------------------- Demand Charge kWh kW x $0.02805 0.98 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 0.98 Base Bill Subtotal Subtotal Transmission Distrib/Access Energy Charge On-Peak Charge kWh x $0.00090 0.04890 $0.00081 ------------------------------------------------------------------ 0.03795 Retail Fuel & Purchased Off-Peak kWh x $0.02919 $0.02614 Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Transmission Net Performance Energy Charge On-Peak kWh x $0.00000 $0.00000 Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 Off-Peak kWh x $0.00000 $0.00000 DSM kWh x $0.00381 $0.00381 ------------------------------------------------------------------ ----------------------------------------------------------- Delivery Component Subtotal Subtotal Combined Adjustment Charge $0.04571 $0.04571 Generation Charge On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 120 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 Attachment 1 Exhibit 4 Page 23 24 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 Rate Customers Hours Use: 200 250 ----------------------------------------------------------------------------------------------------------------------------------- Maximum Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 25,000 $27,125.36 28,470.74 $10,970.40 13,713.00 $38,095.76 42,183.74 $27,563.03 29,561.92 $6,720.00 8,400.00 $34,283.03 37,961.92 ($3,812.734,221.82) -14.1-14.8% -10.0% 300 250 50,000 62,500 $68,416.03 71,779.48 $27,426.00 34,282.50 $95,842.03 106,061.98 $69,449.92 74,447.13 $16,800.00 21,000.00 $86,249.92 95,447.13 ($9,592.1110,614.85) -14.0-14.8% -10.0% 1,000 500 100,000 125,000 $135,997.58 142,724.48 $54,852.00 68,565.00 $190,849.58 211,289.48 $138,149.00 148,143.42 $33,600.00 42,000.00 $171,749.00 190,143.42 ($19,100.5821,146.06) -14.0-14.8% -10.0% > 1,000 1,000 200,000 250,000 $272,545.01 285,998.81 $109,704.00 137,130.00 $382,249.01 423,128.81 $276,792.75 296,781.59 $67,200.00 84,000.00 $343,992.75 380,781.59 ($38,256.2642,347.22) -14.0-14.8% -10.0% > 1,000 1,500 300,000 375,000 $406,320.19 426,500.89 $164,556.00 205,695.00 $570,876.19 632,195.89 $412,941.71 442,924.97 $100,800.00 126,000.00 $513,741.71 568,924.97 ($57,134.4863,270.92) -14.1-14.8% -10.0% -----------------------------------------------------------------------------------------------------------------------------------

Proposed Rates. T-1 T-2 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 with Customer Charge with Ratchet kW = First 150 kW $10.13 30.86 $10.13 30.86 Ratchet kW = First 150 kW $27.77 $27.77 < 300 kW $127.37 $127.37 < 300 kW $114.62 $114.62 > 300 kW $185.20 $185.20 > 300 kW $166.67 $166.67 > 1,000 kW $416.22 $416.22 > 1,000 kW $374.57 $374.57 Demand Charge kW x $24.52 $11.45 Distrib/Access Energy Charge On-Peak kWh x $0.25689 0.03975 $0.11063 Distrib/Access On-Peak 0.02757 Demand Charge kWh kW x $0.23648 21.09 $0.10894 9.32 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Transmission ----------------------------------------------------------- Demand Charge kWh kW x $0.02805 0.98 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 0.98 Base Bill Subtotal Subtotal Transmission Distrib/Access Energy Charge On-Peak Charge kWh x $0.00090 0.04890 $0.00081 ------------------------------------------------------------------ 0.03795 Retail Fuel & Purchased Off-Peak kWh x $0.02919 $0.02614 Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Transmission Net Performance Energy Charge On-Peak kWh x $0.00000 $0.00000 Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 Off-Peak kWh x $0.00000 $0.00000 DSM kWh x $0.00381 $0.00381 ------------------------------------------------------------------ ----------------------------------------------------------- Delivery Component Subtotal Subtotal Combined Adjustment Charge $0.04571 $0.04571 Generation Charge On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 122 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 Attachment 1 Exhibit 4 Page 23 26 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 Rate Customers Hours Use: 200 350 ----------------------------------------------------------------------------------------------------------------------------------- Maximum Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 35,000 $27,125.36 31,161.50 $10,970.40 19,198.20 $38,095.76 50,359.70 $27,563.03 33,559.68 $6,720.00 11,760.00 $34,283.03 45,319.68 ($3,812.735,040.02) -14.1-16.2% -10.0% 300 250 50,000 87,500 $68,416.03 78,506.38 $27,426.00 47,995.50 $95,842.03 126,501.88 $69,449.92 84,441.55 $16,800.00 29,400.00 $86,249.92 113,841.55 ($9,592.1112,660.33) -14.0-16.1% -10.0% 1,000 500 100,000 175,000 $135,997.58 156,178.28 $54,852.00 95,991.00 $190,849.58 252,169.28 $138,149.00 168,132.26 $33,600.00 58,800.00 $171,749.00 226,932.26 ($19,100.5825,237.02) -14.0-16.2% -10.0% > 1,000 1,000 200,000 350,000 $272,545.01 312,906.40 $109,704.00 191,982.00 $382,249.01 504,888.40 $276,792.75 336,759.27 $67,200.00 117,600.00 $343,992.75 454,359.27 ($38,256.2650,529.13) -14.0-16.1% -10.0% > 1,000 1,500 300,000 525,000 $406,320.19 466,862.28 $164,556.00 287,973.00 $570,876.19 754,835.28 $412,941.71 502,891.49 $100,800.00 176,400.00 $513,741.71 679,291.49 ($57,134.4875,543.79) -14.1-16.2% -10.0% -----------------------------------------------------------------------------------------------------------------------------------

Proposed Rates. T-1 T-2 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 with Customer Charge with Ratchet kW = First 150 kW $10.13 30.86 $10.13 30.86 Ratchet kW = First 150 kW $27.77 $27.77 < 300 kW $127.37 $127.37 < 300 kW $114.62 $114.62 > 300 kW $185.20 $185.20 > 300 kW $166.67 $166.67 > 1,000 kW $416.22 $416.22 > 1,000 kW $374.57 $374.57 Demand Charge kW x $24.52 $11.45 Distrib/Access Energy Charge On-Peak kWh x $0.25689 0.03975 $0.11063 Distrib/Access On-Peak 0.02757 Demand Charge kWh kW x $0.23648 21.09 $0.10894 9.32 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Transmission ----------------------------------------------------------- Demand Charge kWh kW x $0.02805 0.98 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 0.98 Base Bill Subtotal Subtotal Transmission Distrib/Access Energy Charge On-Peak Charge kWh x $0.00090 0.04890 $0.00081 ------------------------------------------------------------------ 0.03795 Retail Fuel & Purchased Off-Peak kWh x $0.02919 $0.02614 Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Transmission Net Performance Energy Charge On-Peak kWh x $0.00000 $0.00000 Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 Off-Peak kWh x $0.00000 $0.00000 DSM kWh x $0.00381 $0.00381 ------------------------------------------------------------------ ----------------------------------------------------------- Delivery Component Subtotal Subtotal Combined Adjustment Charge $0.04571 $0.04571 Generation Charge On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 121 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 Attachment 1 Exhibit 4 Page 23 25 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 Rate Customers Hours Use: 200 300 ----------------------------------------------------------------------------------------------------------------------------------- Maximum Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 30,000 $27,125.36 29,816.12 $10,970.40 16,455.60 $38,095.76 46,271.72 $27,563.03 31,560.80 $6,720.00 10,080.00 $34,283.03 41,640.80 ($3,812.734,630.92) -14.1-15.5% -10.0% 300 250 50,000 75,000 $68,416.03 75,142.93 $27,426.00 41,139.00 $95,842.03 116,281.93 $69,449.92 79,444.34 $16,800.00 25,200.00 $86,249.92 104,644.34 ($9,592.1111,637.59) -14.0-15.5% -10.0% 1,000 500 100,000 150,000 $135,997.58 149,451.38 $54,852.00 82,278.00 $190,849.58 231,729.38 $138,149.00 158,137.84 $33,600.00 50,400.00 $171,749.00 208,537.84 ($19,100.5823,191.54) -14.0-15.5% -10.0% > 1,000 1,000 200,000 300,000 $272,545.01 299,452.60 $109,704.00 164,556.00 $382,249.01 464,008.60 $276,792.75 316,770.43 $67,200.00 100,800.00 $343,992.75 417,570.43 ($38,256.2646,438.17) -14.0-15.5% -10.0% > 1,000 1,500 300,000 450,000 $406,320.19 446,681.58 $164,556.00 246,834.00 $570,876.19 693,515.58 $412,941.71 472,908.23 $100,800.00 151,200.00 $513,741.71 624,108.23 ($57,134.4869,407.35) -14.1-15.5% -10.0% -----------------------------------------------------------------------------------------------------------------------------------

Proposed Rates. T-1 T-2 Summer Winter Summer Winter ------ ------ ------ ------ Customer Charge $11.26 $11.26 with Customer Charge with Ratchet kW = First 150 kW $10.13 30.86 $10.13 30.86 Ratchet kW = First 150 kW $27.77 $27.77 < 300 kW $127.37 $127.37 < 300 kW $114.62 $114.62 > 300 kW $185.20 $185.20 > 300 kW $166.67 $166.67 > 1,000 kW $416.22 $416.22 > 1,000 kW $374.57 $374.57 Demand Charge kW x $24.52 $11.45 Distrib/Access Energy Charge On-Peak kWh x $0.25689 0.03975 $0.11063 Distrib/Access On-Peak 0.02757 Demand Charge kWh kW x $0.23648 21.09 $0.10894 9.32 Off-Peak kWh x $0.01784 $0.01445 Distrib/Access Off-Peak Transmission ----------------------------------------------------------- Demand Charge kWh kW x $0.02805 0.98 $0.02509 ----------------------------------------------------------- Transmission On-Peak Charge kWh x $0.00761 $0.00351 0.98 Base Bill Subtotal Subtotal Transmission Distrib/Access Energy Charge On-Peak Charge kWh x $0.00090 0.04890 $0.00081 ------------------------------------------------------------------ 0.03795 Retail Fuel & Purchased Off-Peak kWh x $0.02919 $0.02614 Power Delivery Component Subtotal Subtotal Charge kWh x $0.03709 $0.03709 Transmission Net Performance Energy Charge On-Peak kWh x $0.00000 $0.00000 Adjustment Generation Charge Charge kWh x $0.00481 $0.00481 Off-Peak kWh x $0.00000 $0.00000 DSM kWh x $0.00381 $0.00381 ------------------------------------------------------------------ ----------------------------------------------------------- Delivery Component Subtotal Subtotal Combined Adjustment Charge $0.04571 $0.04571 Generation Charge On-Peak kWh x $0.02800 $0.02800 DSM kWh x $0.00354 $0.00354 Off-Peak kWh x $0.02800 $0.02800 ----------------------------------------------------------- Combined Adjustment Charge $0.04544 $0.04544 119 125 File Name: S\SHARED\SALESGEN\TYPCBILL\TYP98SE2.WK4 Boston Edison Company Last Update: 28-May-97 M.D.P.U. Nos. 96-100 & 96-23 Range Name: RATE T-2 S-2 Attachment 1 Exhibit 4 Page 23 29 of 29 Boston Edison Company Settlement Proposal 1998 Rate Designs (Seasonality & Time-of-Use in Access & Distribution) Impact on T-2 S-2 Rate Customers Hours Use: 200 ----------------------------------------------------------------------------------------------------------------------------------- Maximum ------------------------------------------------------------------------------------------------------------------ Average Present Rates Proposed Rates Difference Ratchet Average Monthly Adjustment Annual Delivery Energy Annual Difference % of % of kW kW kWh Base Factors Total Component Component Total In Totals Base Total ----------------------------------------------------------------------------------------------------------------------------------- 150 100 20,000 ------------------------------------------------------------------------------------------------------------------ 2,600 $27,125.36 1,907.16 $10,970.40 1,307.28 $38,095.76 3,214.44 $27,563.03 2,019.10 $6,720.00 873.60 $34,283.03 2,892.70 ($3,812.73321.74) -14.1-16.9% -10.0% 300 250 50,000 3,000 $68,416.03 2,184.12 $27,426.00 1,508.40 $95,842.03 3,692.52 $69,449.92 2,314.92 $16,800.00 1,008.00 $86,249.92 3,322.92 ($9,592.11369.60) -14.0-16.9% -10.0% 1,000 500 100,000 3,400 $135,997.58 2,461.08 $54,852.00 1,709.52 $190,849.58 4,170.60 $138,149.00 2,610.74 $33,600.00 1,142.40 $171,749.00 3,753.14 ($19,100.58417.46) -14.0-17.0% -10.0% > 1,000 1,000 200,000 3,800 $272,545.01 2,738.04 $109,704.00 1,910.64 $382,249.01 4,648.68 $276,792.75 2,906.57 $67,200.00 1,276.80 $343,992.75 4,183.37 ($38,256.26465.31) -14.0-17.0% -10.0% > 1,000 1,500 300,000 4,200 $406,320.19 3,015.00 $164,556.00 2,111.76 $570,876.19 5,126.76 $412,941.71 3,202.39 $100,800.00 1,411.20 $513,741.71 4,613.59 ($57,134.48513.17) -14.1-17.0% -10.0% -----------------------------------------------------------------------------------------------------------------------------------4,600 $3,291.96 $2,312.88 $5,604.84 $3,498.22 $1,545.60 $5,043.82 ($561.02) -17.0% -10.0% 5,000 $3,568.92 $2,514.00 $6,082.92 $3,794.04 $1,680.00 $5,474.04 ($608.88) -17.1% -10.0% 5,400 $3,845.88 $2,715.12 $6,561.00 $4,089.86 $1,814.40 $5,904.26 ($656.74) -17.1% -10.0% ------------------------------------------------------------------------------------------------------------------ Present Rates S-2 Proposed Rates: S-2 Customer Charge $8.91 Customer Charge $8.02 Energy Charge kWh x $0.05770 Distrib/Access Charge kWh x $0.06001 ----------------------------------------------------- Transmission Charge kWh x $0.00162 Base Bill Subtotal -------------------------------------- Delivery Component Subtotal Retail Fuel & Purchased Power Charge kWh x $0.03709 Net Performance Adjustment Charge kWh x $0.00481 DSM kWh x $0.00000 Generation Charge kWh x $0.02800 ----------------------------------------------------- Combined Adjustment Charge $0.04190 126 Attachment 1 Exhibit 5 1998 Rate Schedules 127 B O S T O N E D I S O N C O M P A N Y ----------------------------------------- S C H E D U L E O F E L E C T R I C R A T E S --------------------------------------------------- Applying to all territory served by the Company in the following cities and towns: Acton, Arlington, Ashland, Bedford, Bellingham, Boston, Brookline, Burlington, Canton, Carlisle, Chelsea, Dedham, Dover, Framingham, Holliston, Hopkinton, Lexington, Lincoln, Maynard, Medfield, Medway, Xxxxxx, Xxxxxx, Natick, Needham, Newton, Norfolk, Xxxxxx, Sherborn, Somerville, Stoneham, Sudbury, Walpole, Waltham, Watertown, Wayland, Weston, Westwood, Winchester and Woburn. 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