Fio Certo: Cálculo Elétrico

⚡ Fio Certo — Electrical Calculation

Fio Certo is an electrical calculation app for electricians, electrical engineers, technicians, and anyone interested. Size conductors, circuit breakers, voltage drop, and electrical projects according to NBR 5410.

The essential app for electricians, electrical engineers, and technicians who need to accurately size conductors and circuit breakers, strictly following the NBR 5410 standard.

No more calculation errors, printed tables, and formulas in your head. With Fio Certo, you can perform complete electrical sizing in the palm of your hand — fast, reliable, and professional.

🔌 COMPLETE ELECTRICAL CALCULATORS

✅ Conductor — Calculate the minimum wire cross-section (mm²) based on power, voltage, circuit length, installation method, and insulation type (PVC or XLPE). The app ensures that the voltage drop respects the 4% limit required by NBR 5410.

✅ Circuit Breaker — Automatically determines the ideal circuit breaker for each circuit, following the standard rule: Ib ≤ In ≤ Iz. The app adjusts to available commercial standards.

✅ General Purpose Outlets (TUG) — Calculates the load per room according to the standard, with differentiated criteria for wet areas (kitchens, bathrooms, laundries) and other environments.

✅ Special Purpose Outlets (TUE) — Dedicated circuits for showers 🚿, air conditioners ❄️, ovens 🍕, motors ⚙️ and much more, with pre-configured power ratings to speed up your work.

📁 PROJECT MANAGEMENT

Organize your electrical projects with client name, technical manager, date, and all calculated circuits. Each circuit stores wire cross-section, capacity, recommended circuit breaker, and voltage drop. Everything is saved locally, available offline.

📊 TECHNICAL TABLES NBR 5410

Consult the current carrying capacity table (Table 33 of the standard) directly in the app. Filter by installation method (B1, B2, C, D), insulation type, and number of conductors. From 1.5mm² to 500mm² cross-section.

📄 TECHNICAL SPECIFICATION REPORT (Premium)

Automatically generate a complete technical specification report of your project, with all circuits, loads, cross-sections, and circuit breakers organized. Ideal for technical documentation, reports, and delivery to the client.

👥 COMMUNITY

Join a community of electrical professionals. Exchange experiences, ask questions, and share best practices with other electricians and engineers.

💡 WHY USE THE RIGHT WIRE?

⚡ Calculations based on NBR 5410 — the current Brazilian standard
📴 Works 100% offline — no internet required
🎯 Intuitive interface with visual identification via emojis
🏗️ For residential and commercial use
📱 Modern and professional design (Material Design 3)
🔄 Automatic updates with new features and bug fixes

💎 PREMIUM PLAN

Unlock unlimited projects and descriptive report generation with an affordable subscription. Invest in the tool that will elevate the quality of your work.