Electrical Current
Definition
The flow of electric charge through a conductor, measured in amperes (A). One ampere equals one coulomb of charge passing a point per second. Current flows from positive to negative (conventional) or negative to positive (electron flow).
Practical Note
Household circuits typically carry 15-20A. Electric vehicle chargers use 30-50A. Industrial motors may draw hundreds of amps. Current capacity determines wire sizing requirements.
Related Calculators
Calculate voltage, current, resistance, or power using Ohm's Law. Enter any two known values to solve for the remaining electrical properties with animated circuit visualization.
Calculate voltage drop and power loss in electrical circuits. Recommend optimal AWG wire sizes for DC, single-phase, and three-phase systems.
Determine correct wire size based on current load and NEC ampacity tables. Applies temperature correction, conduit fill derating, and continuous load factors.
Calculate electric motor power requirements, torque, and recommended motor size. Supports load analysis and standard motor selection.