Conductors & Raceway
Conductor Sizing & Voltage Drop
Compare conductor ampacity and estimate voltage drop on branch circuits and feeders.
Conductor Ampacity CalculatorApply ambient and conductor-count corrections.Branch Circuit Conductor and Breaker CheckCompare general-load requirements with a conductor and breaker.Copper vs Aluminum Wire Cost CalculatorCompare user-entered material and termination costs for two conductor alternatives.Feeder Conductor Sizing and Voltage Drop CalculatorFind the smallest listed feeder conductor meeting ampacity and voltage-drop targets.Voltage Drop and Wire Size CalculatorEstimate circuit voltage loss and compare listed conductor sizes.Wire Resistance CalculatorEstimate one-conductor and current-path resistance from material, conductor size, length, and temperature.Wire Power Loss CalculatorEstimate I-squared-R conductor losses and annual energy cost for single-phase or balanced three-phase circuits.Parallel Conductor Sizing CalculatorEstimate per-set current and voltage drop for identical parallel conductors.Feeder and Branch Circuit Voltage Drop CalculatorSum estimated voltage drop through feeder and branch-circuit segments using separate load and conductor inputs.