Fault Current Calculator (PFC) vs Electrician Pro

Fault Current Calculator for iPhone and iPad is a fast, free tool for electricians, contractors, and engineers. Calculate Prospective Fault Current (PFC), Prospective Short-Circuit Current (PSCC), and Prospective Earth Fault Current (PEFC). Enter any two known values - voltage, loop impedance (Zs/Ze), or fault current - and the app instantly calculates the third. KEY FEATURES: PSCC and PEFC calculations: Calculate prospective short-circuit current for L-N or L-L faults and prospective earth fault current for L-E faults. Single-phase and three-phase support: Perform fault-current calculations for both system types. Automatic calculations: Enter any two known values to auto calculate the third. Loop-impedance calculator: Calculate Zs or Ze from voltage and prospective fault current. Formula display: See the formula used for each calculation so you can understand and verify the result. Works offline: Use the app in roof spaces, basements, plant rooms, and other locations without a signal. Dark mode and light mode: Maintain a clear display in different site conditions. 16 languages: Fully translated for electricians worldwide (af, ar, de, es, en, fr, hi, id, it, ja, ko, nl, pl, pt, ru, zh). Fast and free: A clean interface designed to deliver results without unnecessary steps. DEFINITIONS: AIC (Ampere Interrupting Capacity), often written as kAIC for kilo-Amperes, is a specific rating for protective devices that open a circuit, such as circuit breakers and fuses. SCCR (Short-Circuit Current Rating) is the maximum fault current that a complete piece of equipment or electrical assembly (like an industrial control panel, switchboard, or HVAC unit) can safely withstand without causing a hazard. Electrical calculations should be independently verified before safety-critical work. Ensure the calculated prospective fault current does not exceed the protective device's rated breaking capacity. For additional tools, upgrade to Electrical Tools & Reference, which includes calculators for kVA, Max Zs, cable sizing, and more. Pro Certs Software - trusted by electricians since 2011.

Electrician Pro is a professional electrical calculator and field toolkit built for electricians, electrical engineers, technicians, apprentices, and students. Get fast, reliable calculations wherever you work — on the job site, in the workshop, or while studying. No internet connection required. From Ohm’s Law and power calculations to voltage drop, wire sizing, conduit fill, motors, transformers, and 3-phase systems, Electrician Pro puts the essential tools you need in one place. CORE CALCULATORS — FREE • Ohm’s Law — Calculate voltage, current, resistance, and power • Power Calculator — Calculate watts, VA, kW, and power factor • Unit Converter — Convert common electrical and length units • kW ↔ HP — Quickly convert between power units • AWG ↔ mm² — Convert wire sizes between common standards ADVANCED FIELD TOOLS — PRO Unlock the complete toolkit with 12 advanced calculators and reference tools: • Voltage Drop — Calculate voltage drop and percentage • Wire Size — Select conductor sizes based on NEC requirements • Conduit Fill — Check conduit capacity and fill • Box Fill — Calculate NEC box fill requirements • 1-Phase & 3-Phase Power — Calculate line, phase, and total system values • Motor Calculator — Calculate motor FLA and power requirements • Power Factor — Calculate PF, kW, kVA, and kVAR • Transformer — Calculate turns ratios and primary/secondary currents • Resistor Colors — Decode 4, 5, and 6-band resistors • Cable Comparison — Compare technical specifications across wire sizes • Conduit Bending — Calculate offset, stub, and saddle bends WHY ELECTRICIAN PRO? • 100% Offline — Work without Wi-Fi or mobile data • Fast — Enter your values and get results instantly • Professional — Built around established electrical formulas and NEC-based calculations • Practical — Designed for real-world electrical work, not complicated menus • Global — Available in 10 languages, including English, Arabic, Chinese, Japanese, Korean, Spanish, French, German, Italian, and Portuguese Whether you’re installing circuits, sizing cables, checking voltage drop, working with motors, or studying electrical engineering, Electrician Pro gives you the calculations you need when you need them. Calculate smarter. Work faster. Carry your electrical toolkit wherever you go.