Electrical / Electronics
Single-phase voltage drop
Helper calculation for simplified single-phase voltage drop from resistivity and area; it is not standards-based conductor sizing.
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Voltage drop percent
Converts voltage drop to a percentage of nominal voltage.
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.
Cable resistance from resistivity
Calculates resistance of a uniform conductor 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 insulated-copper ampacity
Historical data from a 1938 publication. Exact Iz lookup for educational and comparative use only.