Load calculations, conductor and breaker sizing, voltage drop, short-circuit and arc-flash studies, panel schedules, transformer and generator sizing, raceway and box fill, grounding and bonding — every core calculation worked with real numbers, start to finish.
This module runs one small commercial building through the entire design sequence, calculation by calculation, using every selection criterion Module 2 introduced and every concept Module 3 explained — not as isolated formulas, but as a chain where each result feeds the next: the load calculation's OCPD size shows back up sizing the equipment grounding conductor at the very end, the same feeder conductor gets checked against real rooftop ambient conditions, and the short-circuit study's fault current becomes a direct input to the arc-flash study that follows it.
Where a first-pass answer technically clears code but leaves almost no margin, the module shows the fix, not just the flaw — because that judgment, not the formula alone, is what a real design review is actually checking for. If the arithmetic gets away from you anywhere, the studio's calculators below run this same math live.