Exhibit 12 ONCOR ELECTRIC DELIVERY COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Year Ended December 31, -------------------------------------------- 2003 2002 2001 2000 ---- ---- ---- ---- Millions of Dollars, Except Ratios EARNINGS: Income (loss) from continuing operations $ 258 $ 245 $ 228 $ 226 Add:Total federal income taxes 126 118 119 120 Fixed charges (see detail below) 309 274 280 270 ----- ----- ----- ----- Total earnings $ 693 $ 637 $ 627 $ 616 ===== ===== ===== ===== FIXED CHARGES: Interest expense, excluding capitalized interest $ 304 $ 270 $ 274 $ 264 Rentals representative of the interest factor 5 4 6 6 ----- ----- ----- ----- Total fixed charges $ 309 $ 274 $ 280 $ 270 ===== ===== ===== ===== RATIO OF EARNINGS TO FIXED CHARGES 2.24 2.32 2.24 2.28 ==== ==== ==== ====