Single-family standard (Part III) and optional (220.82), duplex per 220.85 with independent Unit 1 / Unit 2, and multifamily with named unit groups (220.84) — mixed buildings handled exactly. Service size per 240.6(A) with copper THHN and aluminum XHHW conductor recommendations — Table 310.12 (83% rule) where it applies.

Mixed conductor types and sizes across EMT, IMC, RMC, PVC Sch 40/80, ENT, FMC, and LFMC. Applies the 53/31/40% rules, the 60% nipple allowance, and Note 7 rounding, with a minimum-trade-size recommendation.

All four standard waiver types with a live paper preview — draw a signature on screen (mouse or finger), auto-dated today, then print or save the finished waiver as a PDF. Generic form; verify state statutory requirements.

K-factor method for single and three-phase circuits, copper or aluminum, with parallel sets, minimum size for a target percentage, and a courtesy 75°C ampacity check.