The working notes
Show the work.
Electrical planning, explained with inputs, results, and the assumptions in between.
Home run planning with ZapSketch: a step-by-step guide
How to plan electrical home runs: set the scale, place the panel, draw each run, and check wire size, voltage drop and conduit fill. With a by-hand method for every step.
Updated Read article comparison · voltage-drop / validationSouthwire Voltage Drop Calculator Alternative: 21,000 Circuits Tested
Tested on 21,000 circuits against Southwire’s voltage drop calculator: all 10,500 DC results match to the last digit. Every input and result is downloadable.
Updated Read articleWorking on a run? Open the free calculators