NF C 15-100 Jobsite Pocket Reference

Offline-first Progressive Web App for electricians

izyElec is a free Progressive Web App designed as a chantier aide-mémoire for French residential electrical work under NF C 15-100. It helps electricians and installers quickly look up room requirements, cable sizing hints, earthing / equipotential bonding notes, bathroom volumes 0 / 1 / 2, glossary terms, and a Consuel-oriented checklist — including fully offline use on a phone.

It is not a conformity certification tool and not a substitute for the official AFNOR text. Decisions on site must always be checked against the current standard and the real job context.

The product is published by axialdata (Pierre-Yves Léglise EI) and is available without an account.

Technical Stack

Frontend:

• React 19 + TypeScript
• Vite 8 for build and development
• Tailwind CSS 4 with a custom design-token theme (light / dark)
• React Router DOM for client-side navigation
• Lucide React for icons
• Oxlint for linting

Offline & local data:

• vite-plugin-pwa + Workbox (prompt-based updates)
• Service worker with offline shell and navigate fallback
• IndexedDB persistence via idb-keyval (checklist state)

Deployment:

• Static SPA served by Nginx in a single Docker image
• Coolify-compatible (Dockerfile, port 80, /healthz)
• Production URL: https://izyelec.com

Security headers (edge):

• Strict CSP, HSTS preload, COOP / COEP / CORP
• Referrer-Policy, Permissions-Policy, X-Frame-Options DENY
• Tuned for a high score on MDN HTTP Observatory

Main Features

Room assistant:

• Per-room shortcuts (living room, kitchen, bathroom, bedroom, WC, circulation, outdoor, garage…)
• Must-have points, watchouts, and usual circuits (section / breaker)
• Deep links to bathroom volumes and earthing chapters when relevant

Calculators:

• Cable section & voltage-drop helper (mono / tri, copper / aluminium)
• Breaker ↔ section sanity check with status pills
• Quick notes for DDR 30 mA, GTL / board, and Consuel earth reminders

Earthing & equipotential bonding:

• Dedicated chapter for earth electrode, PE, LEP, LEL / LES
• Practical rows for sections / elements and measurement reminders

Bathroom volumes:

• Interactive volume diagram (tray / bath geometries)
• Allowed / forbidden material guidance per volume 0 / 1 / 2
• Cross reminders for DDR 30 mA and local equipotential bonding (LEL)

Glossary:

• Searchable acronyms and technical terms (PE, LEL, DDR, GTL…)
• Filters by acronym / term

Jobsite checklist:

• Before / during / tests style checklist templates
• Project name + progress bar
• Persisted locally in IndexedDB (works offline)

Offline & PWA

• Installable on Android / desktop (Chrome, Edge) and iOS “Add to Home Screen”
• Native install prompt when the browser exposes beforeinstallprompt
• Offline badge and update banner when a new service worker is waiting
• App shell cached for use without network coverage on site

Responsive Layout

• Mobile-first UI kept as the primary chantier experience
• Tablet layout: wider content column and multi-column grids
• Desktop layout: sticky side navigation, expanded content width, calculators and reference blocks side-by-side
• Dark mode with persistent preference

SEO & Discoverability

• Per-route titles and descriptions
• Open Graph / Twitter meta + share image
• JSON-LD (WebApplication + Organization)
• sitemap.xml, robots.txt, llms.txt, and AI catalog endpoints

Legal & Privacy

• Mandatory French legal notices (LCEN)
• Free access, no user account, local-first storage
• Optional self-hosted audience measurement (Rybbit) documented in the privacy section

Used in production since September 2026.

Last update : v1.1.1 – September 2026

Resources:

Application : https://izyelec.com

Publisher : https://www.axialdata.net