Calcul Électrique NF C 15-100

"Electrical Calculation NF C 15-100" is the electrician's calculator, designed for the job site: cable cross-section, voltage drop, power balance, current/power conversion. 100% offline, ad-free, no account required: it works everywhere, even in basements without network access.

FREE AND UNLIMITED — ESSENTIAL CALCULATIONS
No daily calculation quota, no hidden limits. Calculate as much as you want, free, for life.

• Cable cross-section "3 criteria": complete sizing combining voltage drop and permissible current Iz (table 52H) according to the installation method (A1, A2, B1, B2, C, E), insulation (PVC/PR), ambient temperature, and grouped circuits, with correction factors K1/K2. The app also calculates the circuit breaker rating In and verifies the rule IB ≤ In ≤ Iz.

• Voltage drop: result in volts and percentage, 3%/5% thresholds, compliance badge at a glance.

• Power balance: diversity factor, operating current, choice of subscription in kVA (single-phase and three-phase).

• Power ↔ current: single-phase/three-phase conversion with cos φ.

Equipment per room: number of outlets and light points per room.

PROFESSIONAL TOOLS — ONE-TIME PURCHASE €9.99, NO SUBSCRIPTION REQUIRED
Pay once, it's yours for life. No subscription, no renewal.

• NF C 15-100 circuits: number of circuits and protection ratings (circuit breakers) per use.

• PE protective conductor: earth conductor cross-section.

• Bathroom zones: zones 0/1/2 and authorized equipment.

• 30 mA residual current devices: type A / type AC distribution. • Electrical panel & GTL: 20% reserve, ETEL dimensions.

• Quick reference guide: equipment heights, AGCP and emergency shut-off, surge protector.

• PDF export of the calculation report with your name and tradesperson profile ("Prepared by [name, company]"): a clean document to give to the client or the inspection agency.

WHO IS IT FOR?
Self-employed and employed electricians, building tradespeople, apprentices and students in electrical engineering (CAP, BP, Bac Pro MELEC, BTS Electrotechnics), and instructors in vocational training centers. A pocket-sized tool for verifying sizing on-site or reviewing for an exam.

AVAILABLE IN 10 LANGUAGES
French, English, Spanish, Portuguese, Turkish, Albanian, Romanian, Arabic, Polish, Ukrainian. Ideal for site teams and non-native French-speaking apprentices: everyone works in their own language.

COMPLIANT WITH NF C 15-100 STANDARDS
Calculations are based on the principles of standard NF C 15-100 and IEC 60364-5-52 (permissible currents). This application is an AID for electrical sizing: each installation must be checked and validated by a qualified professional. Compliance is not promised or guaranteed automatically.

DESIGNED FOR BUILDING PROFESSIONALS
• Sunlight-readable screen.

Contextual help "?" on each field.

Tutorial on first launch.

French decimal point.

100% offline: nothing to download on site.

MADE IN FRANCE
Developed by Comptoir Studio, a French publisher. Support: support@comptoirstudio.fr

PRIVACY
No personal data collected, no data resold. Your calculations remain on your device.