A 37-image illustrated reference collection covering electrical engineering fundamentals — power distribution and premises wiring, grounding & bonding, conductor sizing and residential wiring maps, protective devices and motor circuit protection, motors & industrial control, low-voltage/life-safety/building-automation systems, and a matched utility substation illustration set — presented as a zoomable interactive reader so every label, table, and callout stays legible. Pinch or Ctrl/Cmd-scroll to zoom into any illustration. The first 4 illustrations are free to preview above — the remaining 33 unlock with a one-time $4.99 purchase.
Unlock all 37 illustrations: power distribution and voltage configurations, grounding electrode systems, conductor sizing, residential NEC article maps, GFCI/AFCI device maps, Class 1/2/3 low-voltage circuits, motor branch-circuit protection, fire alarm and integrated security systems, building automation (BAS/BACnet) architecture, and a full substation illustration set from one-line diagram through structural/foundation detail. Instant access after purchase — yours to keep, no expiration.
Or skip picking — the All-Access Pass unlocks every Professional Program, exam, and premium guide on the site, including anything added later, for one flat price.
A broad illustrated reference spanning seven topic areas: power distribution fundamentals (voltage configurations, premises wiring, service entrance requirements, panel schedules); grounding & bonding (electrode systems, bonding vs. grounding, isolated-ground receptacles); wiring, conductors & circuits (conductor sizing, conduit types, residential rough-in, NEC article maps, GFCI/AFCI device layouts, lighting load calculations, and Class 1/2/3 low-voltage circuit limits); protective devices & overcurrent protection (AC disconnect clearances, motor branch-circuit protection and sizing); motors & industrial control; low-voltage, life-safety & building systems (fire alarm, integrated security, smart-home wiring, and BAS/BACnet architecture); and a matched utility-scale power substation illustration set covering the SCADA/RTU architecture, ring-bus isometric, equipment details, structures, and foundations.
Scroll or use the Prev/Next buttons at the bottom to move between illustrations, or press the arrow keys. Click the ☰ menu button in the top-right to open the full index and jump directly to any topic. To zoom in on a detail — an NEC article callout, a table value, a wiring label — hold Ctrl (or Cmd on Mac) and scroll, pinch on a trackpad or touchscreen, or use the +/− buttons in the bottom-right corner; drag to pan while zoomed in, and double-click or use the reset button to return to the full view.
Electrical engineers, electricians, and inspectors who want a quick illustrated reference tying NEC articles to real installation scenarios, students building foundational understanding of power distribution, grounding, wiring, and protection concepts, and building/security/automation professionals who want a visual reference for how low-voltage and BAS systems interconnect with electrical infrastructure.
These are standalone illustrated reference images grouped by topic — not a sequential drawing set with continuous sheet numbering like the site's other interactive readers. Each illustration covers a distinct electrical concept, organized from foundational to more advanced within each topic area.
Yes. Every illustration is a high-resolution image and the reader supports pinch-zoom, Ctrl/Cmd-scroll zoom, and click-drag panning, so you can zoom into any callout, label, or table value for a clear, legible view.
The first 4 illustrations are free with no purchase or account required. The remaining 33 unlock with a one-time $4.99 purchase.
No. Checkout is guest-only via Stripe — no account required. After purchase you get a bookmarkable access link, and you can always recover it later with the restore-by-email link using the email you checked out with.
This is an in-browser interactive reader, not a file download — it is designed for studying and referencing the collection directly in your browser with full zoom/pan detail, similar to the site's other interactive readers and illustrated guides.
Disclaimer: This collection is an educational illustrated reference summarizing common electrical engineering concepts and typical NEC article relationships. It is not a substitute for the full text of the National Electrical Code or any applicable local amendments, is not engineering-stamped for any specific project, and should not be used as the sole basis for design, installation, or inspection decisions. Always verify current code requirements and specific application details with a licensed electrical engineer or the authority having jurisdiction.