Initial Commit

2026-09-15 15:24:03 -04:00
commit 4dc7086e7e
605 changed files with 101380 additions and 0 deletions
@@ -0,0 +1,19 @@
+2. ELECTRICAL ENGINEERING
+SCORE: 6.0/10
+
+Strengths:
+- Uses the correct 3-phase voltage-drop equation with R·cosφ + X·sinφ.
+- Correctly calculates 252 A starting current and handles the 0.30 starting PF.
+- Numerical cable-drop calculations are internally consistent with the stated R/X assumptions.
+- Correctly separates ampacity from voltage-drop performance.
+
+Major errors:
+- Direct contradiction: first says X·sinφ is "dominant," then correctly calculates it as only ~17% of cable impedance drop.
+- Treats 5% as a NEMA MG 1 starting-voltage-drop limit; that is not a general motor-start acceptance criterion.
+- Actual starting terminal sag cannot be assessed from cable impedance alone; transformer/source impedance is essential.
+- NEC motor conductor sizing is not simply 42 A < 65 A. Motor conductor rules generally involve 125% of applicable motor FLC plus installation/termination/derating requirements.
+- Assumes THHN/THWN-2 and a 75°C ampacity column despite those conditions not being given.
+- The assumed 0.10 mΩ/m reactance is plausible only as an estimate and materially affects the starting result.
+
+Verdict:
+Good engineering mathematics, but insufficient code discipline and an overconfident final "pass." The defensible conclusion is that 6 AWG appears plausible for cable voltage drop under stated assumptions, while total starting-voltage performance and NEC compliance remain unproven.