3Faz: Electrical Calculator

Cloudbud Tech

In-app purchases

About this app

faz is an electrical calculator for engineers, electricians and students that works on site. Results update as you type, are checked against the limit, and one tap shows the formula and the standard behind them. No internet needed.

YOUR COUNTRY'S STANDARD
• Profiles for the US (NEC), international (IEC 60364), the UK (BS 7671) and Türkiye (TS HD 60364)
• Limits, units and tables follow the profile you pick
• AWG/kcmil and mm², feet and meters, HP and kW
• English and Turkish

83 TOOLS IN 15 MODULES
• Cables: wire and cable sizing, voltage drop, maximum cable length, ampacity tables, conduit and trunking fill, busbar rating
• Protection: breaker selection, short-circuit current, cable thermal withstand, RCD selection, B, C, D trip curves
• Grounding and earthing: rod, strip and plate resistance, soil resistivity (Wenner), protective and bonding conductor size, TT, TN, IT guide, foundation earthing
• Motors: current, power, efficiency, power factor, speed, slip, torque, star-delta starting, terminal diagrams, motor cable and protection
• Power factor correction: capacitor kVAr, kVAr to µF, step plan
• Transformers and generators: transformer sizing, rated and short-circuit current, losses, generator sizing, UPS and battery runtime
• Solar PV and storage: string design, DC cable size, panel count, DC fuse and surge protection, battery bank
• Lighting: lumen method, average illuminance, energy use
• Lightning and surge: surge protective devices, protection angle and rolling sphere
• Basics: Ohm's law, real, reactive and apparent power, load current, energy cost
• Electronics: resistor and capacitor color codes, SMD codes, LED resistor, voltage divider, 555 timer
• Converters: AWG to mm², kW, HP and kVA, star-delta impedance, dB and dBm
• Regional packs: NEC conduit and box fill (US), max Zs and ring final circuit test (UK), demand factors and EMO fees (Türkiye)
• Library: cable types, IP and IK ratings, conductor colors, plugs and sockets, regulation summaries

EVERY RESULT SHOWS ITS SOURCE
"How it's calculated" lays out the formula, your values in it, what each symbol means and the clause of the standard. Every result is checked against its limit: within limit, near limit or over.

PROJECTS AND REPORTS
• Save calculations to projects and group a circuit's calculations under one label
• Get a bill of materials for the project
• Share a calculation or a whole project as a PDF report

faz PRO
• PDF reports with your company logo and letterhead
• Single-line diagram, drawn from the calculations in your project
• Quantity takeoff, building and riser load
• Motor and transformer nameplate scanning (the photo stays on your device)
• Voltage drop with reactance, selectivity, mesh grounding, touch and step voltage, harmonics and resonance risk, reactive penalty check, lightning risk assessment, solar annual yield, NEC dwelling load

71 of the 83 tools are free. Pro comes monthly, yearly (with a 3-day free trial) or as a one-time lifetime purchase.

PRIVACY
faz asks for no account and collects nothing that identifies you. Your calculations and projects stay on your device.

faz is a calculation aid. Results need review by a qualified engineer.

Payment is charged to your Apple Account when you confirm the purchase. A subscription renews automatically unless it is canceled at least 24 hours before the end of the current period.

What’s new

What's new:
• The app is now called 3Faz, with a new icon and launch screen
• Report details: enter your name, registration number and company once in Settings, and every report carries them
• Company name and address are now free; the logo comes with 3Faz Pro