# Electrical Load Case Studies > Electrical engineering companion for load calculations, code compliance, and design case studies. (iPhone/iPad app by Yuhsiu Lai.) - Source: https://appshunter.io/ios/app/electrical-load-case-studies/id1097542655 (this page in markdown: same URL + `.md`) - Developer: [Yuhsiu Lai](https://appshunter.io/developer/433114647) - Category: Reference, Utilities, Education - Price: $4.99 - Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 14 MB - Languages: English - Released: 2016-04-05 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/electrical-load-case-studies/id1097542655/reviews.md ## What is Electrical Load Case Studies? Electrical Load Case Studies is a hands-on engineering companion for designers, students, and apprentices learning electrical distribution. Instead of static reference pages, every calculation walks you through each step with the NEC article it cites — so you build judgment, not just answers. Whether you're sizing a residential service, sanity-checking a feeder before submittal, or studying for a code exam, you have the working tools and the reasoning behind them in one place. CALCULATORS • Residential service load — both the standard method (NEC 220 Part III) and the optional method (220.82). Editable inputs for square footage, small-appliance and laundry circuits, fixed appliances, range, dryer, HVAC noncoincident loads, and EV chargers. Every demand factor is shown with the article it comes from. • Commercial service load — unit-load by occupancy, receptacle demand factor, motor branch sizing, continuous-load adjustment. • Conductor & breaker sizing — adjusts 90°C ampacity for ambient temperature and bundling, enforces 110.14(C) terminal limits and 240.4(D) small-conductor caps, picks the next standard OCPD per 240.6(A). • Voltage drop — branch and feeder, single-phase or three-phase, with an automatic upsize suggestion when drop exceeds 3%. • Box volume fill — Table 314.16(B) per-conductor volume, with proper handling of devices, clamps, support fittings, and grouped equipment grounds. CASE STUDIES Three progressive worked examples — single-family dwelling, six-unit multifamily with 220.84 diversity, and a small commercial tenant build-out. Each includes a scenario brief, load schedule, single-line representation, decision-point quizzes that explain the reasoning behind each choice, and a one-tap link into the live calculator with the values pre-loaded. CODE BROWSER Searchable summaries of the NEC articles you actually use — 220, 230, 240, 250, 310, 314, 625, 705 — with plain-English explanations and a "common mistakes" list for each. SCENARIO SIMULATOR Take a finished residential calculation and layer on a real-world change: add a Level-2 EV charger, convert AC to a heat pump, add an ADU, or test a PV interconnection against the 705.12 120% rule. See the before/after demand, line current, and required service size side-by-side. PRACTICE MODE Self-assessment problems with numeric answer fields, tolerance-based grading, and full worked solutions when you want to compare your work line-by-line. DIAGRAMS 22 reference illustrations covering services, branch wiring, grounding systems, and motor circuits, with pinch-zoom viewing. EXPORT Generate a project-ready PDF of any calculation — header, summary, full step-by-step trace, NEC references, footer disclaimer — sized for letter paper and ready to share, file, or print. Educational tool. NEC values reflect common 2023 NEC practice; verify against your codebook and have all designs reviewed by a licensed engineer before installation. ## Key features - Step-by-step NEC calculations - Residential and commercial load calculators - Conductor and breaker sizing - Voltage drop analysis - Box volume fill calculations - Worked case studies - Searchable code browser - Scenario simulator - Practice mode with solutions - Exportable PDF reports ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/electrical-load-case-studies/id1097542655/reviews.md ### 1/5 — This app is absolute garbage *2025-03-19* Do not waste any time or money on this app it is absolutely useless garbage definitely don’t recommend ## Frequently asked questions about Electrical Load Case Studies ### What is Electrical Load Case Studies? Electrical Load Case Studies is a reference app designed to help users with electrical load calculations and understanding NEC articles. It offers interactive calculators and detailed case studies for practical learning. ### How does Electrical Load Case Studies help with NEC compliance? The app walks users through calculations step-by-step, citing the specific NEC articles used. It also includes a searchable code browser with plain-English explanations and common mistakes for key articles. ### What types of calculations are included in Electrical Load Case Studies? It includes calculators for residential and commercial service loads, conductor and breaker sizing, voltage drop, and box volume fill, all referencing relevant NEC sections. ### Can I export my calculations from Electrical Load Case Studies? Yes, you can generate a project-ready PDF of any calculation. This PDF includes a header, summary, step-by-step trace, NEC references, and a footer disclaimer, ready for sharing or printing. ### What are the case studies in Electrical Load Case Studies? The app features three progressive worked examples: a single-family dwelling, a six-unit multifamily building, and a small commercial tenant build-out, each with quizzes and links to pre-loaded calculators. ### What devices is Electrical Load Case Studies available on? Electrical Load Case Studies is available on iPhone, iPad, and iPod devices, making it accessible for users on the go. ### How much does Electrical Load Case Studies cost? Electrical Load Case Studies is a paid application, priced at $4.99. This one-time purchase grants access to all its features and content. ### How often is Electrical Load Case Studies updated? The app was last updated on April 28, 2026, indicating recent development and potential for ongoing improvements and NEC code updates. ## Version history (last 2 releases) ### 2.0 — 2026-04-28 Version 2.0 — a complete rebuild from the ground up. NEW — Calculators with reasoning Residential and commercial load calculators, conductor and breaker sizing, voltage drop, and box fill. Every result comes with a numbered step-by-step breakdown showing the formula, intermediate values, and the NEC article each step cites. NEW — Case studies you can interact with Three progressive case studies (small dwelling → multifamily → small commercial) with reveal-on-tap reasoning steps and decision-point quizzes that explain why each answer is right or wrong. NEW — NEC code browser Searchable summaries of the load-calculation articles plus a "common mistakes" list for each. Tap a reference badge in any calculator step to jump straight to the article. NEW — Scenario simulator Add an EV charger, swap AC for a heat pump, add an ADU, or test a PV interconnection. See the calculation before and after, with a clear flag if the existing service needs to be upgraded. NEW — Practice mode Self-assessment problems with tolerance-based grading and full worked solutions. NEW — PDF export Project-ready output of any calculation, ready to share or file. Modernized for iOS 17 and the latest iPhones and iPads — full Auto Layout, Dark Mode, accessibility, and the privacy manifest required by current App Store guidelines. Thanks for the feedback that shaped this update. ### 1.2 — 2016-04-05 This app has been updated by Apple to display the Apple Watch app icon. ## More apps by Yuhsiu Lai - [Availability and Reliability](https://appshunter.io/ios/app/availability-and-reliability/id435033141) - [Battery Capacity Calculator](https://appshunter.io/ios/app/battery-capacity-calculator/id445176473) - [48VDC Power System](https://appshunter.io/ios/app/48vdc-power-system/id449477913) - [NEC Electrical Code Tools](https://appshunter.io/ios/app/nec-electrical-code-tools/id469334093) - [Engineer's Toolset](https://appshunter.io/ios/app/engineers-toolset/id478486737) - [Battery Current Simulator](https://appshunter.io/ios/app/battery-current-simulator/id488430945) All apps by Yuhsiu Lai: https://appshunter.io/developer/433114647 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*