Fault Current Calculator (PFC) vs PAT Test 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.

PAT Test Pro — intelligent portable appliance testing on iPhone, iPad and Mac. Built by iCertifi for electricians and electrical contractors who want PAT testing finished on site, not typed up later. Scan, test, certify, email — before you leave the building. WHY ELECTRICIANS SWITCH • Unlimited appliances and unlimited certificates — no per-item or per-cert charges • Works offline; everything syncs the moment you are back on signal • Start on iPhone, continue on iPad, finish on Mac — one account, one dataset • No PC, no third-party desktop software, no manual transfers SMART BARCODE SCANNING Scan an appliance ID and its details fill themselves in. Return to a site months later, scan the same item, and every previously saved detail — make, model, location, class, previous results — populates instantly. No duplicate entry, no re-typing. APPLIANCE PASSPORT Every appliance carries its own history. Tap any item in Scannable Appliances, or the History button on the test form, to see every test ever recorded against that Appliance ID: dates, certificates, pass/fail results, readings and photos. Ideal for client queries and repeat contracts. AI APPLIANCE SCANNING Point the camera at an appliance and let the AI carry out the visual inspection. It records every defect found, its severity and the reasoning, and saves the findings alongside the test — ready-made evidence for failed items, remedial quotes and client disputes. RETEST DATES THAT CHASE THEMSELVES Set retest intervals per appliance or per site. Upcoming retests appear on your home screen, so recurring work comes back to you instead of quietly expiring. PROFESSIONAL CERTIFICATES Generate clean, fully compliant PAT test certificates carrying your company details, logo, retest date and digital signature. Choose your certificate colour. Email straight to the client as a secure PDF, or keep it in the cloud. BUILT FOR IN-SERVICE INSPECTION AND TESTING • Built-in database of common appliances for fast, accurate entry • Pass, fail and remedial recording with photo evidence • An asset register that builds itself as you test • Automatic certificate and page handling — no page limits to manage • Class I, Class II, extension lead and IEC lead testing • Suits offices, schools, landlords, HMOs, hotels, construction sites and portfolio contracts BOOKKEEPING BUILT IN Every completed appliance can raise a draft invoice in Mint Books automatically — invoicing, quotations and Making Tax Digital compliance without leaving the job. SECURE CLOUD, NOT A SPREADSHEET Industry-leading cloud infrastructure with end-to-end encryption and redundant storage. Your data is private, backed up and accessible only to you — even if a device is lost, stolen or replaced. SUBSCRIPTION An auto-renewing subscription is required to send and save PAT testing certificates and to use cloud storage. Payment is charged to your iTunes account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours prior to the end of the current period. Manage or cancel at any time in your Account Settings. Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://icertifi.zendesk.com/hc/en-us/articles/201659279-iCertifi-s-Privacy-Policy-GDPR-Compliance