Lineman's Reference vs Commercial Electrical 3D Guide

Learn it. Wire it. Energize it. Check your work. Built by a working journeyman lineman for linemen and their apprentices. The XFMR Lab simulates distribution transformer banks driven by your own wiring — the metering, fusing, and faulting all behave the way you'd expect in the field. NEW IN 2.0 — BUILT-IN TRANSFORMER TRAINING (Replacing XFMR INFO) Six guided lessons take you from "what's a transformer?" to wiring a 3-pot bank: • Start Here — What is a Transformer? • Dual H Bushings — The Two Wirings & the Nameplate • The Tap Changer — One Pot, Multiple System Voltages • Three-Phase — The Three Phases and How They're Related • Bank Identification — Delta or Wye, Open or Closed • Your First Bank: Delta-Wye Closed (120/208) • More lessons on the way! Work the lessons in order, or jump straight to the labs. ALSO NEW IN 2.0 • The Sandbox (Beta) — wire anything from scratch in a COMPLETELY-customizable lab, with live, vector-based voltage and fault logic baked in. • Death Traps — scenario-based transformer traps linemen run into — and how to navigate them safely. • A brand-new look across every lab — new graphics, sharper, faster, & easier to read in the field. • Voltmeter you can now drag with two fingers; readings update as the leads move. • Parallel the secondary coils by hand in wye secondary labs • Stats that track lab completions, quiz scoring and for-fun stuff like the number of fuses you've blown. • User Customizations - the user can now alter the spec of their labs; from grounding to parallel coil cutover-direction, requiring the 4th cutout, tap changer implementation and more. • 2.0 is FREE for everyone who already owns XFMR Lab — thank you for years of feedback and encouragement. WHAT YOU GET Single Phase — Single Bushing · Dual Bushing Three Phase (closed) — Delta-Delta · Delta-Wye · Wye-Delta · Wye-Wye Three Phase (open) — Open Delta-Delta · Open Wye-Delta Misc — Paralleling · 4th Cutout · Death Traps (6 Scenarios) Advanced — Straight 480 · 240/480 · 277/480 · Corner-Grounded 240/480 · Wye-Wye 5-Wire (120/240 + 120/208) - all now able to be wired up Wye AND Delta on the topside The Sandbox (Beta) EVERY FUTURE UPDATE IS FREE - THE APP IS A ONE-TIME PURCHASE. I'm always working on new updates. TOOLS & REFERENCE • Volt, ohm and rotation meters with real behavior • Nameplate, secondary coil and tap changer animations • Reference diagrams for every standard bank Learning Mode walks apprentices through every wrong-connection check. Journeymen and experienced users can keep this turned off if they'd like. QUIZZES • Classic Quiz — Select each lab you want in your quiz - with graded scoring across each lab. • Advanced Quiz — You're provided with the job-site info and need to pick the right nameplate and coil setup, then wire it. • Bank ID - A beginner's quiz tied into the new XFMR Training lesson plan. The user is provided with different primary and secondary wirings and must correctly identify them. Used by 30,000+ linemen since 2021. Questions? Suggestions? Reach me at info@digitalapprentice.net

Commercial Electrical 3D Guide puts you inside a fully wired 3-story commercial office building, rendered in real-time 3D with transparent walls so every electrical system is visible at once. Built for electricians, engineers, inspectors, contractors, and students, this is the most detailed interactive electrical reference available on iPhone and iPad. EXPLORE THE 3D BUILDING Rotate, pinch, and zoom through a complete building model showing power distribution from the utility service entrance to branch circuits on every floor. Toggle X-Ray mode to see through walls and trace every conduit run. Filter by system category to isolate exactly what you need. SYSTEMS COVERED Power Distribution: utility transformer, main switchboard, distribution panels, branch circuit panels, automatic transfer switch, bus duct riser, motor control centers, variable frequency drives Emergency Power: generator, ATS, UPS systems, emergency panels, critical load circuits Lighting and Controls: lighting panels, occupancy sensors, daylight controls, emergency lighting, exit signs Low Voltage: data rooms, telecom closets, fire alarm interface, security connections, grounding and bonding Mechanical: chillers, AHUs, cooling towers, pumps, VAV boxes with all electrical connections shown TAP TO LEARN Tap any component to instantly see its full name, NEC code reference, function description, inspection interval, common failure modes, and AHJ notes. Every component is linked to real code data you can use on the job. BUILDING SECTIONS Six 2D section drawings give you a schematic view of the building: three cut sections (A-A, B-B, C-C) and three elevations (West, East, North), all drawn to scale with every component labeled. Tap any symbol to open the tap-to-learn panel. Tap cut line indicators in the 3D scene to jump straight to the matching section view. LEARNING HUB - 8 MODULES Quiz: NEC code questions covering load calculations, conductor sizing, OCPD ratings, and grounding, with full explanations on every answer. Glossary: Complete electrical terminology covering NEC definitions, trade terms, and common abbreviations. Guided Tour: Step-by-step walkthrough of the power path from utility entrance to final outlet. Fault Simulator: Diagnostic sequences for ground faults, overloads, open neutrals, and arc-fault nuisance tripping. Load Calculator: Branch circuit, feeder, and service entrance calculations per NEC Article 220 with real-time results. Violations: The most cited NEC violations in commercial construction with correct installations and inspection tips. Inspection Checklist: Inspection forms for rough-in, service entrance, panel trim-out, and final phases. Mark pass or fail and review a summary report. App Guide: Complete walkthrough of every feature so you get full value from day one. REFERENCE DOCUMENTS Single Line Diagram: Full power distribution SLD from utility to branch circuits, color coded by voltage level. Floor Plans: Electrical floor plans for all three floors with full component labels and circuit routing. Legend: Complete symbol legend for every device in the drawings. Load Schedule: Panel schedules for every board in the building with connected loads and demand factors. Calculation Sheets: Service sizing, fault current, and voltage drop calculations shown in full. Equipment Schedule: Full equipment list with NEC ratings and installation locations. GALLERY 44 professional electrical reference drawings in six categories: distribution diagrams, floor plans, section views, details, schedules, and code references. Pinch to zoom, swipe to browse, search by keyword. Dark mode only. iPhone and iPad, portrait and landscape, iOS 16 and later. No ads. No subscription.