Printable Voltage Drop Worksheet
This worksheet is for electricians, installers, and anyone checking single-phase voltage drop on branch circuits or feeders. It includes the formula VD = 2 × K × I × L ÷ CM, with K values shown for copper and aluminum, plus a table with columns for Circuit, Volts, Amps, One-way length (ft), K, Circular mils, Voltage drop, and % drop. Example rows include garage sub-feed entries with sample values filled in.
Free printable · PDF
- 1 page
- US Letter, landscape — choose “Fit to page” for A4
- PDF, 105 KB
Free for personal, family and classroom use.
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Use the sheet by entering the circuit details, then filling in the conductor constant, circular mils, and calculated voltage drop. Compare the result to your target % drop and use the worksheet to review different wire sizes or run lengths before selecting a conductor.
Good for
- Check voltage drop on single-phase runs
- Compare copper and aluminum conductor options
- Record feeder and sub-feed calculations
Tip: Print in landscape so the full calculation table stays easy to read.
5 files · PDF, XLSX, DOCX
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This sheet plus 5 more in one download, with the editable Excel and Word files. Printable copper and aluminum ampacity chart, correction and bundling factor sheet, an Excel corrected-ampacity calculator, a voltage drop worksheet and a circuit schedule template.
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