LEARNING//WORKED EXAMPLES
VOLTAGE DROP CALCULATION EXAMPLES
Learn voltage drop calculations through practical, real-world examples. Each example includes complete step-by-step solutions showing how to apply formulas, iterate on wire sizes, and achieve NEC-compliant designs.
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Residential Garage Circuit
ResidentialBeginner
Calculate voltage drop for a 20A, 120V circuit to a detached garage 150 feet from the main panel.
GIVEN PARAMETERS
voltage
120V
phase
Single-phase
current
20A
length
150 feet
conductor
Copper
conduit
PVC
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