Electrical Calc Pack 2.0 - NEC Edition

12 ready-to-use NEC-compliant Excel spreadsheets for US electrical engineers and contractors. Covers wire sizing, voltage drop, short circuit, lighting design, load schedule, circuit breakers, power factor, transformers, energy consumption, HVAC load, lightning protection, and grounding & bonding. All calculations based on NEC 2023 / NFPA 70, ASHRAE, IEEE, and NFPA 780. Works with Excel 2016+ and Google Sheets. Instant access. Lifetime updates.