Apps Like Fault Current Finder for iPhone and iPad
Model systems to calculate
Models electrical distribution systems to calculate available . Users input system data to determine short circuit currents at various points. The assists in verifying if equipment like fuses and circuit breakers are properly rated.
Fault Current Finder screenshots
Ranked alternatives
Showing 1–20 of 1,000 ranked alternatives.


Southwire® Voltage Drop Calc
Southwire Company
Calculate and wire size
Calculate for a specific conductor run or determine wire size based on and current carrying capacity. Limits wire size to and NEC ampacity. Supports AWG and KCMIL sizes only.

SLD | Electrical diagrams
Angel Martinez
Create with drag-and-drop symbols
Create one-line using standardized symbols. Select and drag symbols to arrange . Includes IEC and ANSI symbols for engineering. Add circuit breakers, switches, fuses, and other components. Save and export .



Mike Holt's Electrical Toolbox
Mike Holt Enterprises Inc.
Size conductors, calculate voltage drop, select circuit
Provides conductor sizing calculations, circuit protection sizing, raceway sizing, and equipment grounding conductor sizing for heating and air-conditioning equipment.

2017 Master Electrician Ref.
PawEng, LLC
Access electrical codes and standards
Access electrical codes and standards for residential, commercial, and industrial applications. Search for wiring diagrams, safety protocols, and equipment specifications. View detailed explanations of electrical systems and components.

Ugly's Electrical References
Informed Publishing
Access code tables and track updates
Access code updates for 2023 NEC and NEMA standards. View table changes, formulas, and conduit bending guides with video tutorials. Calculate ampacity and conduit fill. Include transformer data and wiring configurations.


Ohms Law Calc.
V PUGAZHENTHI
Calculate voltage, current, and resistance
Calculate electrical values using formulas for voltage, current, resistance, power, and more. Determine wire size and voltage drop. Perform transformer and generator calculations. Convert between electrical units.


Electrical Calculator lite
V PUGAZHENTHI
Calculate voltage, current, and resistance
Calculate values using resistor color codes, voltage, current, and resistance formulas. Perform impedance and RLC circuit analysis. Input values to get accurate results for engineering, wiring, and circuit design tasks.


Electrical Calculator
V PUGAZHENTHI
Calculate values instantly
Provides tools for and electronics calculations. Users can compute resistance, voltage, current, and power. Includes resistor color code conversion and voltage drop calculations aligned with NEC/IEEE standards. Supports USCS and SI units.

Piper PA-44 Training
Aircraft Training Aids, LLC
Explore aircraft systems with interactive diagrams
Learn about aircraft systems and limitations through organized chapters based on the POH. Explore interactive diagrams to tap on components and see system changes.





Electronics Engineer Helper
Rostyslav Dovhaliuk
Search datasheets and calculate resistor values
Datasheet search allows users to find electronic components. Resistor color codes and markings are decoded for 4, 5, and 6 band codes. Electronic symbols are displayed according to IEC 60617, IEEE 315, and GOST standards.
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