TradesElectrical
Electrical tools
Sizing a circuit is one connected decision, not five separate lookups. These tools follow the run from the load through the wire, the breaker, the conduit, and the box, and tell you what is really driving each size.
Electrical Wire Size and Voltage Drop Pick a conductor size and material for a run, and know whether ampacity or voltage drop is really driving it. Electrical Breaker and OCPD Sizing Size the breaker for a load and its conductor, and see what the code rules actually require. Electrical Voltage Drop Remedy Your run drops too much voltage. See the ways to fix it and which one makes sense. Electrical Conduit Fill Pick a conduit size for a bundle of conductors and see how much room is left for future pulls. Electrical Box Fill Figure the required box volume for your conductors and devices, and pick a box that fits.