I salvaged a bad transformer. I took it apart and made notes, number of turns on the primary and wire size. I saved the laminations to use another day, that was 20 years ago. I have lost my notes. Now I have a project for this transformer I need to calculate the number of turns on the primary and wire size for 120 VAC, 1800 watts.
Laminations measure, 6 1/4" x 5 1/4". The lamination stack is 2 7/8" thick. Lamination center is 2 1/8" wide.
Ep = 120
Bm = 1.0
f = frequency = 60
Ac = core area sq in = 6.109375
Np = [3.49 x Ep x 10 to 6 power] divide by [f x Ac x Bm]
Np = [3.49 x 120 x 10^6] / [60 x 6.109 x 1] = [418.8 x 10^6] / 366.54 = 418,800,000. / 366.54 = 1,142,576.5 This is WRONG
1.1 million turns is WRONG. I think the primary was closer to 200 turns.