Electrical / Electronics
DC two-wire voltage drop
Helper calculation for DC voltage drop from current, resistance per meter and length; it is not standards-based conductor sizing.
Related calculators
Voltage drop percent
Converts voltage drop to a percentage of nominal voltage.
Cable power loss
Helper calculation for cable power loss from current and resistance; it is not an allowable-load assessment.
Wire resistance
Calculates theoretical wire resistance from resistivity, length and cross-sectional area.
Manual single-phase cable sizing check
Combines load current, manually corrected Iz, voltage drop and overload-condition checks.
Single-phase selection from user table
Selects the smallest entered section that meets the manual current conditions and voltage-drop limit.
Historical minimum copper section
Historical data from a 1938 publication. Smallest-section selection without interpolation, for educational and comparative use only.